/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/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:37:27,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:37:27,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:37:27,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:37:27,601 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 19:37:27,632 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:37:27,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:37:27,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:37:27,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:37:27,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:37:27,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:37:27,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:37:27,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:37:27,634 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:37:27,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:37:27,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:37:27,635 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:37:27,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:37:27,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:37:27,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:37:27,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:37:27,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:37:27,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:37:27,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:37:27,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:37:27,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:37:27,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:37:27,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:37:27,637 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:37:27,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:37:27,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:37:27,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:37:27,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:37:27,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:37:27,854 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:37:27,855 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:37:27,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2022-03-03 19:37:27,856 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2022-03-03 19:37:27,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:37:27,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:37:27,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:37:27,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:37:27,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:37:27,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,899 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:37:27,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:37:27,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:37:27,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:37:27,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:37:27,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:37:27,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:37:27,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:37:27,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:37:27,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/1) ... [2022-03-03 19:37:27,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:37:27,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:27,940 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 19:37:27,969 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 19:37:27,982 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:37:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:37:27,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:37:27,982 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:37:27,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:37:27,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:37:27,983 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:37:27,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:37:27,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:37:27,983 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 19:37:28,019 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:37:28,021 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:37:28,102 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:37:28,129 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:37:28,129 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-03 19:37:28,130 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-03 19:37:28,131 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-03 19:37:28,133 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:37:28 BoogieIcfgContainer [2022-03-03 19:37:28,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:37:28,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:37:28,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:37:28,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:37:28,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:27" (1/2) ... [2022-03-03 19:37:28,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608e12a9 and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:37:28, skipping insertion in model container [2022-03-03 19:37:28,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:37:28" (2/2) ... [2022-03-03 19:37:28,144 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2022-03-03 19:37:28,151 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:37:28,151 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:37:28,151 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:37:28,152 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:37:28,196 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 19:37:28,241 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:37:28,249 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 19:37:28,250 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 19:37:28,258 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-03-03 19:37:28,272 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-03 19:37:28,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:28,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:28,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:28,289 INFO L85 PathProgramCache]: Analyzing trace with hash 185268790, now seen corresponding path program 1 times [2022-03-03 19:37:28,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:28,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88589293] [2022-03-03 19:37:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:28,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:28,439 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 19:37:28,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:28,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88589293] [2022-03-03 19:37:28,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88589293] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:37:28,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:37:28,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:37:28,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233072534] [2022-03-03 19:37:28,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:37:28,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:37:28,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:37:28,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:37:28,489 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 19:37:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:28,525 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2022-03-03 19:37:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:37:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-03 19:37:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:28,533 INFO L225 Difference]: With dead ends: 20 [2022-03-03 19:37:28,533 INFO L226 Difference]: Without dead ends: 16 [2022-03-03 19:37:28,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:37:28,537 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:28,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:28,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-03 19:37:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-03 19:37:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2022-03-03 19:37:28,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2022-03-03 19:37:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:28,580 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2022-03-03 19:37:28,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 19:37:28,581 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2022-03-03 19:37:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-03 19:37:28,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:28,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:28,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:37:28,582 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1471443425, now seen corresponding path program 1 times [2022-03-03 19:37:28,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:28,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697742234] [2022-03-03 19:37:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:28,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:28,674 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 19:37:28,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:28,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697742234] [2022-03-03 19:37:28,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697742234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:37:28,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:37:28,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:37:28,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613634967] [2022-03-03 19:37:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:37:28,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:37:28,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:37:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:37:28,678 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 19:37:28,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:28,705 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2022-03-03 19:37:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:37:28,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-03 19:37:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:28,710 INFO L225 Difference]: With dead ends: 21 [2022-03-03 19:37:28,710 INFO L226 Difference]: Without dead ends: 18 [2022-03-03 19:37:28,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:37:28,714 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:28,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-03 19:37:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-03 19:37:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2022-03-03 19:37:28,718 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2022-03-03 19:37:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:28,719 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2022-03-03 19:37:28,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 19:37:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2022-03-03 19:37:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-03 19:37:28,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:28,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:28,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:37:28,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:28,721 INFO L85 PathProgramCache]: Analyzing trace with hash 820973954, now seen corresponding path program 1 times [2022-03-03 19:37:28,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:28,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81446848] [2022-03-03 19:37:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:28,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:28,798 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 19:37:28,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:28,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81446848] [2022-03-03 19:37:28,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81446848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:28,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614432926] [2022-03-03 19:37:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:28,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:28,803 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 19:37:28,804 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 19:37:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:28,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:37:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:28,916 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 19:37:28,938 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 19:37:28,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:28,989 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:37:28,989 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 12 treesize of output 11 [2022-03-03 19:37:28,999 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 19:37:28,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614432926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:29,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:29,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-03 19:37:29,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394235061] [2022-03-03 19:37:29,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:29,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:37:29,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:29,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:37:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:37:29,003 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 19:37:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:29,056 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2022-03-03 19:37:29,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:37:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-03 19:37:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:29,059 INFO L225 Difference]: With dead ends: 25 [2022-03-03 19:37:29,060 INFO L226 Difference]: Without dead ends: 21 [2022-03-03 19:37:29,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:37:29,064 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:29,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-03 19:37:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-03 19:37:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2022-03-03 19:37:29,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2022-03-03 19:37:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:29,069 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2022-03-03 19:37:29,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 19:37:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2022-03-03 19:37:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-03 19:37:29,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:29,070 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:29,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-03 19:37:29,275 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 19:37:29,276 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:29,276 INFO L85 PathProgramCache]: Analyzing trace with hash -296532971, now seen corresponding path program 2 times [2022-03-03 19:37:29,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:29,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509172115] [2022-03-03 19:37:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:29,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:29,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:29,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509172115] [2022-03-03 19:37:29,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509172115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:29,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762539416] [2022-03-03 19:37:29,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:29,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:29,328 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 19:37:29,329 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 19:37:29,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:29,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:37:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:29,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:29,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762539416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:29,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:29,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-03-03 19:37:29,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439812966] [2022-03-03 19:37:29,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:29,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:37:29,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:29,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:37:29,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:37:29,462 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:29,493 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2022-03-03 19:37:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:37:29,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-03 19:37:29,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:29,496 INFO L225 Difference]: With dead ends: 50 [2022-03-03 19:37:29,496 INFO L226 Difference]: Without dead ends: 45 [2022-03-03 19:37:29,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:37:29,499 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:29,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-03 19:37:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2022-03-03 19:37:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 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 19:37:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2022-03-03 19:37:29,514 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2022-03-03 19:37:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:29,515 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2022-03-03 19:37:29,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:29,515 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2022-03-03 19:37:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-03 19:37:29,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:29,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:29,543 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 19:37:29,716 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 19:37:29,717 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1667530614, now seen corresponding path program 3 times [2022-03-03 19:37:29,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:29,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612064446] [2022-03-03 19:37:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:29,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:29,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:29,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612064446] [2022-03-03 19:37:29,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612064446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:29,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163557890] [2022-03-03 19:37:29,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:29,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:29,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:29,803 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 19:37:29,804 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 19:37:29,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:37:29,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:29,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:37:29,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:29,913 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 19:37:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:29,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:29,971 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:29,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:29,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163557890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:29,988 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:29,988 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-03-03 19:37:29,988 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604830254] [2022-03-03 19:37:29,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:29,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:37:29,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:37:29,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:37:29,989 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:30,083 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2022-03-03 19:37:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:37:30,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-03 19:37:30,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:30,085 INFO L225 Difference]: With dead ends: 65 [2022-03-03 19:37:30,085 INFO L226 Difference]: Without dead ends: 39 [2022-03-03 19:37:30,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:37:30,086 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:30,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 45 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-03 19:37:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2022-03-03 19:37:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2022-03-03 19:37:30,095 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2022-03-03 19:37:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:30,095 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2022-03-03 19:37:30,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2022-03-03 19:37:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:37:30,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:30,096 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:30,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:30,307 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 19:37:30,307 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:30,308 INFO L85 PathProgramCache]: Analyzing trace with hash 176919713, now seen corresponding path program 4 times [2022-03-03 19:37:30,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:30,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606964234] [2022-03-03 19:37:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:30,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:30,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:30,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606964234] [2022-03-03 19:37:30,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606964234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:30,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311387501] [2022-03-03 19:37:30,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:30,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:30,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:30,355 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 19:37:30,357 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 19:37:30,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:30,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:37:30,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:30,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:30,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311387501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:30,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:30,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:37:30,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704044631] [2022-03-03 19:37:30,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:30,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:37:30,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:37:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:37:30,443 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:30,469 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2022-03-03 19:37:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:37:30,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 19:37:30,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:30,472 INFO L225 Difference]: With dead ends: 73 [2022-03-03 19:37:30,473 INFO L226 Difference]: Without dead ends: 66 [2022-03-03 19:37:30,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:37:30,473 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:30,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-03 19:37:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2022-03-03 19:37:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 19:37:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2022-03-03 19:37:30,479 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2022-03-03 19:37:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:30,479 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2022-03-03 19:37:30,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2022-03-03 19:37:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 19:37:30,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:30,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:30,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-03 19:37:30,691 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 19:37:30,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:30,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2143585342, now seen corresponding path program 5 times [2022-03-03 19:37:30,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:30,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230769959] [2022-03-03 19:37:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:30,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:30,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230769959] [2022-03-03 19:37:30,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230769959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:30,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645359718] [2022-03-03 19:37:30,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:30,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:30,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:30,778 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 19:37:30,779 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 19:37:30,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:37:30,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:30,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:37:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:30,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:30,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:37:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:30,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:31,137 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:37:31,137 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 12 treesize of output 11 [2022-03-03 19:37:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:31,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645359718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:31,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:31,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:37:31,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954506758] [2022-03-03 19:37:31,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:31,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:37:31,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:37:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:37:31,163 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:31,407 INFO L93 Difference]: Finished difference Result 128 states and 284 transitions. [2022-03-03 19:37:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:37:31,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 19:37:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:31,409 INFO L225 Difference]: With dead ends: 128 [2022-03-03 19:37:31,409 INFO L226 Difference]: Without dead ends: 125 [2022-03-03 19:37:31,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:37:31,411 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:31,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-03-03 19:37:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-03 19:37:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2022-03-03 19:37:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.263157894736842) internal successors, (172), 76 states have internal predecessors, (172), 0 states have call successors, (0), 0 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 19:37:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 172 transitions. [2022-03-03 19:37:31,429 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 172 transitions. Word has length 15 [2022-03-03 19:37:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:31,429 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 172 transitions. [2022-03-03 19:37:31,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 172 transitions. [2022-03-03 19:37:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 19:37:31,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:31,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:31,446 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 19:37:31,631 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 19:37:31,631 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1999694812, now seen corresponding path program 6 times [2022-03-03 19:37:31,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:31,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653953842] [2022-03-03 19:37:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:31,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:31,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653953842] [2022-03-03 19:37:31,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653953842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:31,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723758286] [2022-03-03 19:37:31,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:31,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:31,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:31,703 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 19:37:31,704 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 19:37:31,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:37:31,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:37:31,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:31,784 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 11 treesize of output 7 [2022-03-03 19:37:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:31,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:31,818 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:31,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:31,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723758286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:31,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:31,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-03 19:37:31,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291578922] [2022-03-03 19:37:31,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:31,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:37:31,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:37:31,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:37:31,838 INFO L87 Difference]: Start difference. First operand 77 states and 172 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:31,977 INFO L93 Difference]: Finished difference Result 152 states and 330 transitions. [2022-03-03 19:37:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:37:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-03 19:37:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:31,978 INFO L225 Difference]: With dead ends: 152 [2022-03-03 19:37:31,978 INFO L226 Difference]: Without dead ends: 111 [2022-03-03 19:37:31,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:37:31,979 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:31,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 77 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-03 19:37:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 65. [2022-03-03 19:37:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.28125) internal successors, (146), 64 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 19:37:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 146 transitions. [2022-03-03 19:37:31,985 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 146 transitions. Word has length 15 [2022-03-03 19:37:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:31,985 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 146 transitions. [2022-03-03 19:37:31,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 146 transitions. [2022-03-03 19:37:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:37:31,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:31,986 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:32,009 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 19:37:32,205 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 19:37:32,206 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1859667401, now seen corresponding path program 7 times [2022-03-03 19:37:32,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:32,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392420076] [2022-03-03 19:37:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:32,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:32,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392420076] [2022-03-03 19:37:32,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392420076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:32,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170019054] [2022-03-03 19:37:32,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:32,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:32,260 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 19:37:32,262 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 19:37:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:32,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:37:32,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170019054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:32,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:32,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-03 19:37:32,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388597715] [2022-03-03 19:37:32,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:32,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:37:32,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:32,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:37:32,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:37:32,372 INFO L87 Difference]: Start difference. First operand 65 states and 146 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:32,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:32,403 INFO L93 Difference]: Finished difference Result 153 states and 318 transitions. [2022-03-03 19:37:32,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:37:32,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:37:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:32,405 INFO L225 Difference]: With dead ends: 153 [2022-03-03 19:37:32,405 INFO L226 Difference]: Without dead ends: 140 [2022-03-03 19:37:32,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:37:32,407 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:32,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 37 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-03 19:37:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2022-03-03 19:37:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1979166666666665) internal successors, (211), 96 states have internal predecessors, (211), 0 states have call successors, (0), 0 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 19:37:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 211 transitions. [2022-03-03 19:37:32,422 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 211 transitions. Word has length 16 [2022-03-03 19:37:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:32,422 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 211 transitions. [2022-03-03 19:37:32,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 211 transitions. [2022-03-03 19:37:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-03 19:37:32,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:32,426 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:32,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:32,647 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 19:37:32,648 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:32,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1374078134, now seen corresponding path program 8 times [2022-03-03 19:37:32,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:32,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974237998] [2022-03-03 19:37:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:32,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:32,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974237998] [2022-03-03 19:37:32,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974237998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:32,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834894408] [2022-03-03 19:37:32,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:32,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:32,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:32,769 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 19:37:32,770 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 19:37:32,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:32,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:37:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:32,843 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 19:37:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:32,878 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:32,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834894408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:32,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:32,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-03-03 19:37:32,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271705703] [2022-03-03 19:37:32,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:32,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:37:32,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:32,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:37:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:37:32,904 INFO L87 Difference]: Start difference. First operand 97 states and 211 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:33,091 INFO L93 Difference]: Finished difference Result 166 states and 328 transitions. [2022-03-03 19:37:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:37:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-03 19:37:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:33,092 INFO L225 Difference]: With dead ends: 166 [2022-03-03 19:37:33,092 INFO L226 Difference]: Without dead ends: 100 [2022-03-03 19:37:33,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:37:33,093 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:33,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 118 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:33,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-03 19:37:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 36. [2022-03-03 19:37:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 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 19:37:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2022-03-03 19:37:33,096 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2022-03-03 19:37:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:33,096 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2022-03-03 19:37:33,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2022-03-03 19:37:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:37:33,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:33,097 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:33,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:33,311 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 19:37:33,312 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash -330172575, now seen corresponding path program 9 times [2022-03-03 19:37:33,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:33,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737627243] [2022-03-03 19:37:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:33,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:33,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:33,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737627243] [2022-03-03 19:37:33,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737627243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:33,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056791873] [2022-03-03 19:37:33,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:33,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:33,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:33,371 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 19:37:33,380 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 19:37:33,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:37:33,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:33,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:37:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:33,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:33,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056791873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:33,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:33,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-03 19:37:33,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026326692] [2022-03-03 19:37:33,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:33,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:37:33,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:33,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:37:33,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:37:33,481 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:33,515 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2022-03-03 19:37:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:37:33,515 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:37:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:33,516 INFO L225 Difference]: With dead ends: 128 [2022-03-03 19:37:33,516 INFO L226 Difference]: Without dead ends: 117 [2022-03-03 19:37:33,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:37:33,517 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:33,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 45 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-03 19:37:33,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2022-03-03 19:37:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 19:37:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2022-03-03 19:37:33,520 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2022-03-03 19:37:33,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:33,520 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2022-03-03 19:37:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2022-03-03 19:37:33,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:37:33,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:33,521 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:33,543 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 19:37:33,728 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 19:37:33,728 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1417189886, now seen corresponding path program 10 times [2022-03-03 19:37:33,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:33,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855087603] [2022-03-03 19:37:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:33,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:33,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:33,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855087603] [2022-03-03 19:37:33,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855087603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:33,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505853987] [2022-03-03 19:37:33,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:33,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:33,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:33,873 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 19:37:33,880 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 19:37:33,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:33,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:37:33,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:33,972 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 19:37:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:33,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:34,016 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:34,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:34,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505853987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:34,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:34,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-03-03 19:37:34,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599544142] [2022-03-03 19:37:34,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:34,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:37:34,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:34,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:37:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:37:34,049 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:34,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:34,309 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2022-03-03 19:37:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:37:34,309 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:37:34,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:34,310 INFO L225 Difference]: With dead ends: 179 [2022-03-03 19:37:34,310 INFO L226 Difference]: Without dead ends: 105 [2022-03-03 19:37:34,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:37:34,311 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:34,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 168 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-03 19:37:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2022-03-03 19:37:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-03-03 19:37:34,313 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2022-03-03 19:37:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:34,314 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-03-03 19:37:34,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-03-03 19:37:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:37:34,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:34,314 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:34,339 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 19:37:34,527 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 19:37:34,527 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash -960135275, now seen corresponding path program 11 times [2022-03-03 19:37:34,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:34,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667245718] [2022-03-03 19:37:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:34,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:34,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:34,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667245718] [2022-03-03 19:37:34,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667245718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:34,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451655251] [2022-03-03 19:37:34,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:34,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:34,589 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 19:37:34,615 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 19:37:34,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:37:34,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:37:34,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:34,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:34,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451655251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:34,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:34,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-03 19:37:34,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704911483] [2022-03-03 19:37:34,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:34,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:37:34,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:34,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:37:34,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:37:34,729 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:34,772 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2022-03-03 19:37:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:37:34,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:37:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:34,774 INFO L225 Difference]: With dead ends: 160 [2022-03-03 19:37:34,774 INFO L226 Difference]: Without dead ends: 147 [2022-03-03 19:37:34,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:37:34,775 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:34,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 53 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-03 19:37:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2022-03-03 19:37:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 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 19:37:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2022-03-03 19:37:34,778 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2022-03-03 19:37:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:34,779 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2022-03-03 19:37:34,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2022-03-03 19:37:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:37:34,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:34,779 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:34,803 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 19:37:35,002 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 19:37:35,002 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:35,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1906718218, now seen corresponding path program 12 times [2022-03-03 19:37:35,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:35,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114857805] [2022-03-03 19:37:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:35,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:35,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:35,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114857805] [2022-03-03 19:37:35,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114857805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:35,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380405540] [2022-03-03 19:37:35,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:35,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:35,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:35,148 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 19:37:35,153 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 19:37:35,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:37:35,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:35,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 19:37:35,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:35,246 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 19:37:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:35,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:35,285 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:35,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:35,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380405540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:35,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:35,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-03-03 19:37:35,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238063567] [2022-03-03 19:37:35,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:35,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:37:35,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:37:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:37:35,318 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:35,678 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2022-03-03 19:37:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:37:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:37:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:35,679 INFO L225 Difference]: With dead ends: 229 [2022-03-03 19:37:35,679 INFO L226 Difference]: Without dead ends: 135 [2022-03-03 19:37:35,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:37:35,680 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:35,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 227 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:37:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-03 19:37:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2022-03-03 19:37:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 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 19:37:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2022-03-03 19:37:35,682 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2022-03-03 19:37:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:35,682 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2022-03-03 19:37:35,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2022-03-03 19:37:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:37:35,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:35,683 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:35,711 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 19:37:35,895 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 19:37:35,895 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1044355617, now seen corresponding path program 13 times [2022-03-03 19:37:35,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:35,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771055405] [2022-03-03 19:37:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:35,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:35,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:35,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771055405] [2022-03-03 19:37:35,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771055405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:35,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175408883] [2022-03-03 19:37:35,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:35,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:35,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:35,970 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 19:37:36,000 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 19:37:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:36,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-03 19:37:36,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:36,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:36,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175408883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:36,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:36,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-03 19:37:36,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716271851] [2022-03-03 19:37:36,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:36,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-03 19:37:36,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:36,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-03 19:37:36,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:37:36,088 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:36,129 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2022-03-03 19:37:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:37:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:37:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:36,130 INFO L225 Difference]: With dead ends: 195 [2022-03-03 19:37:36,130 INFO L226 Difference]: Without dead ends: 180 [2022-03-03 19:37:36,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:37:36,131 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:36,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 52 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:36,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-03 19:37:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2022-03-03 19:37:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 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 19:37:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2022-03-03 19:37:36,135 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2022-03-03 19:37:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:36,135 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2022-03-03 19:37:36,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2022-03-03 19:37:36,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:37:36,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:36,136 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:36,160 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 19:37:36,351 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 19:37:36,351 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1911214146, now seen corresponding path program 14 times [2022-03-03 19:37:36,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:36,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328306988] [2022-03-03 19:37:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:36,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:36,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328306988] [2022-03-03 19:37:36,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328306988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:36,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692274464] [2022-03-03 19:37:36,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:36,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:36,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:36,536 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 19:37:36,537 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 19:37:36,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:36,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 19:37:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:36,647 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 19:37:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:36,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:36,693 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:36,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:36,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692274464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:36,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:36,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-03-03 19:37:36,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984027] [2022-03-03 19:37:36,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:36,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:37:36,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:37:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:37:36,739 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:37,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:37,192 INFO L93 Difference]: Finished difference Result 285 states and 545 transitions. [2022-03-03 19:37:37,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:37:37,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:37:37,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:37,193 INFO L225 Difference]: With dead ends: 285 [2022-03-03 19:37:37,193 INFO L226 Difference]: Without dead ends: 169 [2022-03-03 19:37:37,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:37:37,194 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 184 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:37,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 295 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:37:37,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-03 19:37:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 51. [2022-03-03 19:37:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 19:37:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 96 transitions. [2022-03-03 19:37:37,197 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 96 transitions. Word has length 23 [2022-03-03 19:37:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:37,197 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 96 transitions. [2022-03-03 19:37:37,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 96 transitions. [2022-03-03 19:37:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:37:37,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:37,198 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:37,220 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 19:37:37,410 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 19:37:37,410 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:37,410 INFO L85 PathProgramCache]: Analyzing trace with hash -858825387, now seen corresponding path program 15 times [2022-03-03 19:37:37,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:37,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463821134] [2022-03-03 19:37:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:37,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:37,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:37,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463821134] [2022-03-03 19:37:37,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463821134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:37,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803754015] [2022-03-03 19:37:37,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:37,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:37,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:37,484 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 19:37:37,511 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 19:37:37,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:37:37,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:37:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:37,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:37,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803754015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:37,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:37,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-03 19:37:37,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125558933] [2022-03-03 19:37:37,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:37,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:37:37,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:37:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:37:37,626 INFO L87 Difference]: Start difference. First operand 51 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:37,674 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2022-03-03 19:37:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:37:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:37:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:37,675 INFO L225 Difference]: With dead ends: 233 [2022-03-03 19:37:37,675 INFO L226 Difference]: Without dead ends: 216 [2022-03-03 19:37:37,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:37:37,676 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:37,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 60 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-03 19:37:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2022-03-03 19:37:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.095808383233533) internal successors, (350), 167 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 19:37:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 350 transitions. [2022-03-03 19:37:37,680 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 350 transitions. Word has length 24 [2022-03-03 19:37:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:37,680 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 350 transitions. [2022-03-03 19:37:37,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 350 transitions. [2022-03-03 19:37:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:37:37,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:37,681 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:37,704 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 19:37:37,903 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 19:37:37,904 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1031434442, now seen corresponding path program 16 times [2022-03-03 19:37:37,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:37,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025185792] [2022-03-03 19:37:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:37,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:38,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:38,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025185792] [2022-03-03 19:37:38,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025185792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:38,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483728355] [2022-03-03 19:37:38,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:38,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:38,124 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 19:37:38,136 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 19:37:38,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:38,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:38,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:37:38,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:38,262 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 19:37:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:38,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:38,318 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:38,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:38,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483728355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:38,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:38,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-03-03 19:37:38,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599982727] [2022-03-03 19:37:38,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:38,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:37:38,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:38,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:37:38,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:37:38,370 INFO L87 Difference]: Start difference. First operand 168 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:38,935 INFO L93 Difference]: Finished difference Result 347 states and 667 transitions. [2022-03-03 19:37:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:37:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:37:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:38,937 INFO L225 Difference]: With dead ends: 347 [2022-03-03 19:37:38,937 INFO L226 Difference]: Without dead ends: 207 [2022-03-03 19:37:38,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:37:38,938 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 226 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:38,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 372 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:37:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-03 19:37:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 56. [2022-03-03 19:37:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2022-03-03 19:37:38,941 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2022-03-03 19:37:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:38,941 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2022-03-03 19:37:38,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2022-03-03 19:37:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:37:38,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:38,941 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:38,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:39,147 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 19:37:39,147 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:39,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1886618399, now seen corresponding path program 17 times [2022-03-03 19:37:39,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:39,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431400796] [2022-03-03 19:37:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:39,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:39,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:39,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431400796] [2022-03-03 19:37:39,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431400796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:39,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502541428] [2022-03-03 19:37:39,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:39,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:39,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:39,241 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 19:37:39,241 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 19:37:39,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:37:39,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:37:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:39,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:39,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502541428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:39,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:39,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-03 19:37:39,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807353161] [2022-03-03 19:37:39,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:39,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-03 19:37:39,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-03 19:37:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:37:39,366 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:39,419 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2022-03-03 19:37:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:37:39,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-03 19:37:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:39,421 INFO L225 Difference]: With dead ends: 274 [2022-03-03 19:37:39,421 INFO L226 Difference]: Without dead ends: 255 [2022-03-03 19:37:39,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:37:39,422 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:39,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 70 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-03 19:37:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2022-03-03 19:37:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 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 19:37:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2022-03-03 19:37:39,427 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2022-03-03 19:37:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:39,427 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2022-03-03 19:37:39,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2022-03-03 19:37:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-03 19:37:39,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:39,428 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:39,449 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 19:37:39,642 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 19:37:39,642 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -260195710, now seen corresponding path program 18 times [2022-03-03 19:37:39,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:39,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546140395] [2022-03-03 19:37:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:39,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:39,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546140395] [2022-03-03 19:37:39,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546140395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:39,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721445722] [2022-03-03 19:37:39,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:39,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:39,904 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 19:37:39,906 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 19:37:39,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:37:39,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:39,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:37:39,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:40,020 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 19:37:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:40,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:40,065 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:40,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:40,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721445722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:40,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:40,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-03-03 19:37:40,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818945279] [2022-03-03 19:37:40,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:40,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:37:40,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:40,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:37:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:37:40,120 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:40,831 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2022-03-03 19:37:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:37:40,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-03 19:37:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:40,833 INFO L225 Difference]: With dead ends: 415 [2022-03-03 19:37:40,833 INFO L226 Difference]: Without dead ends: 249 [2022-03-03 19:37:40,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:37:40,834 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 272 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 458 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:37:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-03 19:37:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2022-03-03 19:37:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 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 19:37:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2022-03-03 19:37:40,837 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2022-03-03 19:37:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:40,837 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2022-03-03 19:37:40,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2022-03-03 19:37:40,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:37:40,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:40,838 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:40,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:41,059 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 19:37:41,059 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 546945813, now seen corresponding path program 19 times [2022-03-03 19:37:41,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:41,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229307933] [2022-03-03 19:37:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:41,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:41,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:41,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229307933] [2022-03-03 19:37:41,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229307933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:41,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821691259] [2022-03-03 19:37:41,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:41,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:41,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:41,166 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 19:37:41,203 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 19:37:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:41,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:37:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:41,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:41,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821691259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:41,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:41,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-03 19:37:41,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44964958] [2022-03-03 19:37:41,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:41,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:37:41,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:37:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:37:41,321 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:41,386 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2022-03-03 19:37:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:37:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:37:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:41,388 INFO L225 Difference]: With dead ends: 318 [2022-03-03 19:37:41,388 INFO L226 Difference]: Without dead ends: 297 [2022-03-03 19:37:41,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:37:41,388 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:41,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 90 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-03 19:37:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2022-03-03 19:37:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 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 19:37:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2022-03-03 19:37:41,394 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2022-03-03 19:37:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:41,394 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2022-03-03 19:37:41,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2022-03-03 19:37:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:37:41,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:41,396 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:41,418 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 19:37:41,618 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 19:37:41,618 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash 171054198, now seen corresponding path program 20 times [2022-03-03 19:37:41,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:41,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945154568] [2022-03-03 19:37:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:41,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:41,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:41,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945154568] [2022-03-03 19:37:41,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945154568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:41,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855151441] [2022-03-03 19:37:41,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:41,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:41,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:41,897 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 19:37:41,897 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 19:37:41,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:41,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:37:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:42,048 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 19:37:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:42,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:42,099 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:42,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:42,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855151441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:42,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:42,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-03-03 19:37:42,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640043513] [2022-03-03 19:37:42,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:42,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:37:42,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:42,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:37:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:37:42,156 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:43,001 INFO L93 Difference]: Finished difference Result 489 states and 947 transitions. [2022-03-03 19:37:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:37:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-03 19:37:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:43,003 INFO L225 Difference]: With dead ends: 489 [2022-03-03 19:37:43,003 INFO L226 Difference]: Without dead ends: 295 [2022-03-03 19:37:43,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:37:43,004 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 322 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:43,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 553 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:37:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-03 19:37:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 66. [2022-03-03 19:37:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 19:37:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2022-03-03 19:37:43,007 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 29 [2022-03-03 19:37:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:43,007 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2022-03-03 19:37:43,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2022-03-03 19:37:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:37:43,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:43,008 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:43,032 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 19:37:43,223 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 19:37:43,223 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1030791073, now seen corresponding path program 21 times [2022-03-03 19:37:43,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:43,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860385331] [2022-03-03 19:37:43,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:43,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:43,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:43,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860385331] [2022-03-03 19:37:43,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860385331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:43,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715741818] [2022-03-03 19:37:43,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:43,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:43,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:43,348 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 19:37:43,350 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 19:37:43,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 19:37:43,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:43,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:37:43,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:43,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:43,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715741818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:43,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:43,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-03-03 19:37:43,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614666491] [2022-03-03 19:37:43,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:43,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:37:43,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:37:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:37:43,501 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:43,564 INFO L93 Difference]: Finished difference Result 365 states and 685 transitions. [2022-03-03 19:37:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:37:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:37:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:43,566 INFO L225 Difference]: With dead ends: 365 [2022-03-03 19:37:43,566 INFO L226 Difference]: Without dead ends: 342 [2022-03-03 19:37:43,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:37:43,567 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:43,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 81 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-03 19:37:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 276. [2022-03-03 19:37:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.090909090909091) internal successors, (575), 275 states have internal predecessors, (575), 0 states have call successors, (0), 0 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 19:37:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 575 transitions. [2022-03-03 19:37:43,573 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 575 transitions. Word has length 30 [2022-03-03 19:37:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:43,573 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 575 transitions. [2022-03-03 19:37:43,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 575 transitions. [2022-03-03 19:37:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-03 19:37:43,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:43,574 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:43,597 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 19:37:43,791 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 19:37:43,791 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash 576201922, now seen corresponding path program 22 times [2022-03-03 19:37:43,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:43,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911140154] [2022-03-03 19:37:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:43,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:44,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:44,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911140154] [2022-03-03 19:37:44,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911140154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:44,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841966836] [2022-03-03 19:37:44,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:44,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:44,102 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 19:37:44,102 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 19:37:44,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:44,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-03 19:37:44,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:44,234 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 19:37:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:44,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:44,294 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:44,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:44,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841966836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:44,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:44,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-03-03 19:37:44,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132673329] [2022-03-03 19:37:44,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:44,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:37:44,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:44,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:37:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:37:44,361 INFO L87 Difference]: Start difference. First operand 276 states and 575 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:45,283 INFO L93 Difference]: Finished difference Result 569 states and 1105 transitions. [2022-03-03 19:37:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:37:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-03 19:37:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:45,287 INFO L225 Difference]: With dead ends: 569 [2022-03-03 19:37:45,287 INFO L226 Difference]: Without dead ends: 345 [2022-03-03 19:37:45,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:37:45,292 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 376 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:45,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 657 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:37:45,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-03 19:37:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 71. [2022-03-03 19:37:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 19:37:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2022-03-03 19:37:45,298 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2022-03-03 19:37:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:45,298 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2022-03-03 19:37:45,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2022-03-03 19:37:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:37:45,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:45,299 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:45,325 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 19:37:45,521 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 19:37:45,521 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:45,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash 705468629, now seen corresponding path program 23 times [2022-03-03 19:37:45,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:45,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262600451] [2022-03-03 19:37:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:45,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:45,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:45,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262600451] [2022-03-03 19:37:45,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262600451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:45,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855790458] [2022-03-03 19:37:45,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:45,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:45,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:45,646 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 19:37:45,648 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 19:37:45,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 19:37:45,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-03 19:37:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:45,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:45,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855790458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:45,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:45,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-03-03 19:37:45,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984217635] [2022-03-03 19:37:45,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:45,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:37:45,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:37:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:37:45,812 INFO L87 Difference]: Start difference. First operand 71 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:45,884 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2022-03-03 19:37:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:37:45,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:37:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:45,886 INFO L225 Difference]: With dead ends: 415 [2022-03-03 19:37:45,886 INFO L226 Difference]: Without dead ends: 390 [2022-03-03 19:37:45,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:37:45,887 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 160 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:45,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 94 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:45,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-03 19:37:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2022-03-03 19:37:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.088328075709779) internal successors, (662), 317 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 19:37:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2022-03-03 19:37:45,894 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2022-03-03 19:37:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:45,894 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2022-03-03 19:37:45,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2022-03-03 19:37:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:45,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:45,895 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:45,916 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 19:37:46,095 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 19:37:46,095 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1931958710, now seen corresponding path program 24 times [2022-03-03 19:37:46,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:46,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561748958] [2022-03-03 19:37:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:46,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:46,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561748958] [2022-03-03 19:37:46,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561748958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:46,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543730022] [2022-03-03 19:37:46,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:46,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:46,448 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 19:37:46,449 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 19:37:46,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 19:37:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-03 19:37:46,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:46,588 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 19:37:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:46,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:46,642 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:46,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:46,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543730022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:46,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:46,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 26 [2022-03-03 19:37:46,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350913618] [2022-03-03 19:37:46,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:46,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:37:46,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:46,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:37:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:37:46,708 INFO L87 Difference]: Start difference. First operand 318 states and 662 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:47,730 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2022-03-03 19:37:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:37:47,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-03 19:37:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:47,732 INFO L225 Difference]: With dead ends: 655 [2022-03-03 19:37:47,732 INFO L226 Difference]: Without dead ends: 399 [2022-03-03 19:37:47,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:37:47,733 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 434 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:47,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 770 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:37:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-03-03 19:37:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2022-03-03 19:37:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 75 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 19:37:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2022-03-03 19:37:47,737 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2022-03-03 19:37:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:47,737 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2022-03-03 19:37:47,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2022-03-03 19:37:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:37:47,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:47,738 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:47,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:37:47,951 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 19:37:47,951 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash -215743903, now seen corresponding path program 25 times [2022-03-03 19:37:47,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:47,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197183059] [2022-03-03 19:37:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:47,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:48,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:48,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197183059] [2022-03-03 19:37:48,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197183059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:48,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456319324] [2022-03-03 19:37:48,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:48,071 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 19:37:48,075 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 19:37:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:37:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:48,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:48,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456319324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:48,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:48,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 15 [2022-03-03 19:37:48,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357135622] [2022-03-03 19:37:48,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:48,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:37:48,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:37:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:37:48,238 INFO L87 Difference]: Start difference. First operand 76 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:48,304 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2022-03-03 19:37:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:37:48,305 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:37:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:48,306 INFO L225 Difference]: With dead ends: 468 [2022-03-03 19:37:48,306 INFO L226 Difference]: Without dead ends: 441 [2022-03-03 19:37:48,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:37:48,307 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 162 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:48,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 109 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-03-03 19:37:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2022-03-03 19:37:48,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.085635359116022) internal successors, (755), 362 states have internal predecessors, (755), 0 states have call successors, (0), 0 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 19:37:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2022-03-03 19:37:48,314 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2022-03-03 19:37:48,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:48,315 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2022-03-03 19:37:48,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2022-03-03 19:37:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-03 19:37:48,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:48,315 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:48,337 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 19:37:48,530 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 19:37:48,531 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1620184834, now seen corresponding path program 26 times [2022-03-03 19:37:48,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:48,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204768900] [2022-03-03 19:37:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:48,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:48,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:48,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204768900] [2022-03-03 19:37:48,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204768900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:48,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836854323] [2022-03-03 19:37:48,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:48,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:48,902 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 19:37:48,902 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 19:37:48,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:48,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:48,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-03 19:37:48,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:49,046 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 19:37:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:49,098 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:49,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:49,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836854323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:49,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:49,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 28 [2022-03-03 19:37:49,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304135916] [2022-03-03 19:37:49,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:49,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:37:49,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:37:49,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:37:49,169 INFO L87 Difference]: Start difference. First operand 363 states and 755 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:50,343 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2022-03-03 19:37:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:37:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-03 19:37:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:50,344 INFO L225 Difference]: With dead ends: 747 [2022-03-03 19:37:50,345 INFO L226 Difference]: Without dead ends: 457 [2022-03-03 19:37:50,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:37:50,346 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 496 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:50,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 892 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:37:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-03 19:37:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2022-03-03 19:37:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.95) internal successors, (156), 80 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 19:37:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2022-03-03 19:37:50,350 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2022-03-03 19:37:50,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:50,350 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2022-03-03 19:37:50,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2022-03-03 19:37:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-03 19:37:50,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:50,351 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:50,373 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 19:37:50,563 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 19:37:50,563 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:50,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1290799467, now seen corresponding path program 27 times [2022-03-03 19:37:50,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:50,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022919272] [2022-03-03 19:37:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:50,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:50,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:50,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022919272] [2022-03-03 19:37:50,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022919272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:50,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219241275] [2022-03-03 19:37:50,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:50,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:50,712 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 19:37:50,720 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 19:37:50,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-03 19:37:50,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:50,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-03 19:37:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:50,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:50,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219241275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:50,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:50,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-03-03 19:37:50,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190315593] [2022-03-03 19:37:50,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:50,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:37:50,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:37:50,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:37:50,914 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:50,987 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2022-03-03 19:37:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:37:50,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-03 19:37:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:50,989 INFO L225 Difference]: With dead ends: 524 [2022-03-03 19:37:50,989 INFO L226 Difference]: Without dead ends: 495 [2022-03-03 19:37:50,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:37:50,990 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 190 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:50,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 102 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-03 19:37:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2022-03-03 19:37:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0829268292682928) internal successors, (854), 410 states have internal predecessors, (854), 0 states have call successors, (0), 0 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 19:37:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2022-03-03 19:37:50,998 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2022-03-03 19:37:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:50,998 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2022-03-03 19:37:50,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2022-03-03 19:37:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-03 19:37:50,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:50,999 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:51,020 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 19:37:51,215 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 19:37:51,215 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2100125430, now seen corresponding path program 28 times [2022-03-03 19:37:51,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:51,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538686292] [2022-03-03 19:37:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:51,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:51,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:51,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538686292] [2022-03-03 19:37:51,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538686292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:51,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550435122] [2022-03-03 19:37:51,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:51,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:51,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:51,674 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 19:37:51,674 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 19:37:51,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:51,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-03 19:37:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:51,822 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 19:37:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:51,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:51,872 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:51,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:51,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550435122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:51,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:51,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 30 [2022-03-03 19:37:51,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889187745] [2022-03-03 19:37:51,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:51,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:37:51,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:51,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:37:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:37:51,935 INFO L87 Difference]: Start difference. First operand 411 states and 854 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:53,292 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2022-03-03 19:37:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:37:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-03 19:37:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:53,294 INFO L225 Difference]: With dead ends: 845 [2022-03-03 19:37:53,294 INFO L226 Difference]: Without dead ends: 519 [2022-03-03 19:37:53,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:37:53,296 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 562 mSDsluCounter, 2224 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:53,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1023 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:37:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-03 19:37:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2022-03-03 19:37:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 19:37:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2022-03-03 19:37:53,300 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2022-03-03 19:37:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:53,300 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2022-03-03 19:37:53,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2022-03-03 19:37:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-03 19:37:53,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:53,300 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:53,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-03 19:37:53,515 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 19:37:53,515 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 702457121, now seen corresponding path program 29 times [2022-03-03 19:37:53,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:53,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223875650] [2022-03-03 19:37:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:53,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:53,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:53,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223875650] [2022-03-03 19:37:53,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223875650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:53,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389837455] [2022-03-03 19:37:53,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:53,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:53,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:53,680 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 19:37:53,683 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 19:37:53,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-03 19:37:53,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:53,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-03 19:37:53,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:53,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:53,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389837455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:53,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:53,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 17 [2022-03-03 19:37:53,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105716976] [2022-03-03 19:37:53,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:53,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:37:53,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:37:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:37:53,888 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:53,964 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2022-03-03 19:37:53,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:37:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-03 19:37:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:53,966 INFO L225 Difference]: With dead ends: 583 [2022-03-03 19:37:53,966 INFO L226 Difference]: Without dead ends: 552 [2022-03-03 19:37:53,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:37:53,966 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:53,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 116 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-03-03 19:37:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2022-03-03 19:37:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 states have internal predecessors, (959), 0 states have call successors, (0), 0 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 19:37:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2022-03-03 19:37:53,974 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2022-03-03 19:37:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:53,975 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2022-03-03 19:37:53,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2022-03-03 19:37:53,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-03 19:37:53,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:53,976 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:53,998 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 19:37:54,190 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 19:37:54,190 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:54,190 INFO L85 PathProgramCache]: Analyzing trace with hash -498894526, now seen corresponding path program 30 times [2022-03-03 19:37:54,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:54,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661782257] [2022-03-03 19:37:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:54,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:54,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:54,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661782257] [2022-03-03 19:37:54,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661782257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:54,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845594091] [2022-03-03 19:37:54,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:54,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:54,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:54,662 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 19:37:54,664 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 19:37:54,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-03 19:37:54,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-03 19:37:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:54,831 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 19:37:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:54,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:54,879 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:54,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:54,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845594091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:54,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:54,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 32 [2022-03-03 19:37:54,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814424700] [2022-03-03 19:37:54,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:54,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:37:54,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:37:54,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:37:54,945 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:56,576 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2022-03-03 19:37:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:37:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-03 19:37:56,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:56,578 INFO L225 Difference]: With dead ends: 949 [2022-03-03 19:37:56,578 INFO L226 Difference]: Without dead ends: 585 [2022-03-03 19:37:56,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 19:37:56,579 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 632 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:56,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 1163 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:37:56,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-03 19:37:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2022-03-03 19:37:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 19:37:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2022-03-03 19:37:56,584 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2022-03-03 19:37:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:56,584 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2022-03-03 19:37:56,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2022-03-03 19:37:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-03 19:37:56,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:56,584 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:56,607 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 19:37:56,806 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 19:37:56,806 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:56,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1737217109, now seen corresponding path program 31 times [2022-03-03 19:37:56,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:56,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392356672] [2022-03-03 19:37:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:56,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:56,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:56,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392356672] [2022-03-03 19:37:56,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392356672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:56,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122728298] [2022-03-03 19:37:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:56,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:56,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:56,981 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 19:37:56,982 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 19:37:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:37:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:57,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:57,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122728298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:57,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:57,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 18 [2022-03-03 19:37:57,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992838386] [2022-03-03 19:37:57,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:57,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:37:57,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:57,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:37:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:37:57,210 INFO L87 Difference]: Start difference. First operand 91 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:57,297 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2022-03-03 19:37:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:37:57,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-03 19:37:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:57,300 INFO L225 Difference]: With dead ends: 645 [2022-03-03 19:37:57,300 INFO L226 Difference]: Without dead ends: 612 [2022-03-03 19:37:57,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:37:57,300 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 215 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:57,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 133 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-03-03 19:37:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2022-03-03 19:37:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 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 19:37:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2022-03-03 19:37:57,313 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2022-03-03 19:37:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:57,313 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2022-03-03 19:37:57,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2022-03-03 19:37:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-03 19:37:57,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:57,314 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:57,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-03 19:37:57,533 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 19:37:57,533 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:57,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1710480330, now seen corresponding path program 32 times [2022-03-03 19:37:57,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:57,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548168329] [2022-03-03 19:37:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:57,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:58,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:58,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548168329] [2022-03-03 19:37:58,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548168329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:58,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080441534] [2022-03-03 19:37:58,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:58,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:58,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:58,102 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 19:37:58,102 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 19:37:58,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:58,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-03 19:37:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:58,259 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 19:37:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:58,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:58,321 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:37:58,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:37:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:58,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080441534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:58,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:58,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 34 [2022-03-03 19:37:58,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155675374] [2022-03-03 19:37:58,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:58,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:37:58,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:58,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:37:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:37:58,407 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:00,251 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2022-03-03 19:38:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:38:00,251 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-03 19:38:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:00,253 INFO L225 Difference]: With dead ends: 1059 [2022-03-03 19:38:00,253 INFO L226 Difference]: Without dead ends: 655 [2022-03-03 19:38:00,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:38:00,254 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 706 mSDsluCounter, 2877 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:00,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 1312 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:38:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-03 19:38:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2022-03-03 19:38:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 19:38:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2022-03-03 19:38:00,258 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2022-03-03 19:38:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:00,258 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2022-03-03 19:38:00,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2022-03-03 19:38:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-03 19:38:00,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:00,259 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:00,282 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 19:38:00,471 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 19:38:00,471 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:00,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1462204447, now seen corresponding path program 33 times [2022-03-03 19:38:00,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:00,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960982801] [2022-03-03 19:38:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:00,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:00,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:00,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960982801] [2022-03-03 19:38:00,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960982801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:00,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589243364] [2022-03-03 19:38:00,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:38:00,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:00,643 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 19:38:00,643 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 19:38:00,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-03 19:38:00,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:00,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:00,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:00,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589243364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:00,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:00,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 19 [2022-03-03 19:38:00,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741105711] [2022-03-03 19:38:00,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:00,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:38:00,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:38:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:38:00,859 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:38:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:00,938 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2022-03-03 19:38:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:38:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 42 [2022-03-03 19:38:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:00,940 INFO L225 Difference]: With dead ends: 710 [2022-03-03 19:38:00,940 INFO L226 Difference]: Without dead ends: 675 [2022-03-03 19:38:00,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:38:00,941 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 320 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:00,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 111 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:38:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-03 19:38:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2022-03-03 19:38:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 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 19:38:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2022-03-03 19:38:00,950 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2022-03-03 19:38:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:00,950 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2022-03-03 19:38:00,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 19:38:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2022-03-03 19:38:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-03 19:38:00,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:00,951 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:00,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:01,171 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 19:38:01,171 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1015309186, now seen corresponding path program 34 times [2022-03-03 19:38:01,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:01,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044152221] [2022-03-03 19:38:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:01,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:01,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044152221] [2022-03-03 19:38:01,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044152221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:01,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229499616] [2022-03-03 19:38:01,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:38:01,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:01,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:01,799 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 19:38:01,800 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 19:38:01,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:38:01,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-03 19:38:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:01,952 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 19:38:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:01,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:02,004 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:38:02,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:38:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:02,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229499616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:02,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:02,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 36 [2022-03-03 19:38:02,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850595492] [2022-03-03 19:38:02,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:02,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 19:38:02,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 19:38:02,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:38:02,096 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:04,124 INFO L93 Difference]: Finished difference Result 1175 states and 2305 transitions. [2022-03-03 19:38:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:38:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-03 19:38:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:04,134 INFO L225 Difference]: With dead ends: 1175 [2022-03-03 19:38:04,134 INFO L226 Difference]: Without dead ends: 729 [2022-03-03 19:38:04,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=751, Invalid=4219, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:38:04,136 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 784 mSDsluCounter, 3235 mSDsCounter, 0 mSdLazyCounter, 2832 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:04,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 1470 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2832 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:38:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-03-03 19:38:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 101. [2022-03-03 19:38:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.96) internal successors, (196), 100 states have internal predecessors, (196), 0 states have call successors, (0), 0 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 19:38:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 196 transitions. [2022-03-03 19:38:04,141 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 196 transitions. Word has length 43 [2022-03-03 19:38:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:04,141 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 196 transitions. [2022-03-03 19:38:04,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 196 transitions. [2022-03-03 19:38:04,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-03 19:38:04,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:04,142 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:04,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-03 19:38:04,351 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 19:38:04,351 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1432891925, now seen corresponding path program 35 times [2022-03-03 19:38:04,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:04,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157643988] [2022-03-03 19:38:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:04,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:04,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:04,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157643988] [2022-03-03 19:38:04,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157643988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:04,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805102073] [2022-03-03 19:38:04,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:38:04,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:04,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:04,563 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 19:38:04,563 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 19:38:04,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-03 19:38:04,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:04,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:38:04,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:04,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:04,771 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:04,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805102073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:04,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:04,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 20 [2022-03-03 19:38:04,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621791668] [2022-03-03 19:38:04,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:04,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:38:04,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:04,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:38:04,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:38:04,772 INFO L87 Difference]: Start difference. First operand 101 states and 196 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:04,860 INFO L93 Difference]: Finished difference Result 778 states and 1490 transitions. [2022-03-03 19:38:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:38:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-03 19:38:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:04,863 INFO L225 Difference]: With dead ends: 778 [2022-03-03 19:38:04,863 INFO L226 Difference]: Without dead ends: 741 [2022-03-03 19:38:04,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:38:04,863 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 283 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:04,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 136 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:38:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-03-03 19:38:04,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 633. [2022-03-03 19:38:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.0727848101265822) internal successors, (1310), 632 states have internal predecessors, (1310), 0 states have call successors, (0), 0 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 19:38:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1310 transitions. [2022-03-03 19:38:04,872 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1310 transitions. Word has length 44 [2022-03-03 19:38:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:04,872 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1310 transitions. [2022-03-03 19:38:04,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1310 transitions. [2022-03-03 19:38:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-03 19:38:04,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:04,873 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:04,895 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 19:38:05,086 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 19:38:05,087 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1383356042, now seen corresponding path program 36 times [2022-03-03 19:38:05,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:05,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960683194] [2022-03-03 19:38:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:05,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:05,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960683194] [2022-03-03 19:38:05,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960683194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:05,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651905634] [2022-03-03 19:38:05,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:38:05,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:05,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:05,758 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 19:38:05,766 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 19:38:05,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-03 19:38:05,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-03 19:38:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:05,930 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 19:38:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:05,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:05,986 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:38:05,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:38:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:06,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651905634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:06,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:06,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 38 [2022-03-03 19:38:06,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112961497] [2022-03-03 19:38:06,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:06,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-03 19:38:06,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-03 19:38:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:38:06,070 INFO L87 Difference]: Start difference. First operand 633 states and 1310 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 19:38:08,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:08,346 INFO L93 Difference]: Finished difference Result 1297 states and 2547 transitions. [2022-03-03 19:38:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:38:08,347 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 45 [2022-03-03 19:38:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:08,349 INFO L225 Difference]: With dead ends: 1297 [2022-03-03 19:38:08,349 INFO L226 Difference]: Without dead ends: 807 [2022-03-03 19:38:08,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:38:08,350 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 866 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 3160 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 3366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:08,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 1637 Invalid, 3366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3160 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:38:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-03-03 19:38:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 106. [2022-03-03 19:38:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 105 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 19:38:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2022-03-03 19:38:08,354 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2022-03-03 19:38:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:08,354 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2022-03-03 19:38:08,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 19:38:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2022-03-03 19:38:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-03 19:38:08,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:08,356 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:08,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 19:38:08,563 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 19:38:08,563 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash 88713889, now seen corresponding path program 37 times [2022-03-03 19:38:08,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:08,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869822530] [2022-03-03 19:38:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:08,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:08,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:08,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869822530] [2022-03-03 19:38:08,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869822530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:08,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289543160] [2022-03-03 19:38:08,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:38:08,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:08,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:08,782 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 19:38:08,782 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 19:38:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:08,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 19:38:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:08,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:08,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289543160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:08,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:08,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 21 [2022-03-03 19:38:08,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276936284] [2022-03-03 19:38:08,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:08,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:38:08,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:38:08,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:38:08,982 INFO L87 Difference]: Start difference. First operand 106 states and 206 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:09,106 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2022-03-03 19:38:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:38:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-03 19:38:09,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:09,109 INFO L225 Difference]: With dead ends: 849 [2022-03-03 19:38:09,109 INFO L226 Difference]: Without dead ends: 810 [2022-03-03 19:38:09,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:38:09,111 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 256 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:09,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 150 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:38:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-03-03 19:38:09,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2022-03-03 19:38:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.0705035971223023) internal successors, (1439), 695 states have internal predecessors, (1439), 0 states have call successors, (0), 0 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 19:38:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2022-03-03 19:38:09,121 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2022-03-03 19:38:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:09,121 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2022-03-03 19:38:09,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2022-03-03 19:38:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-03 19:38:09,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:09,125 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:09,149 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 19:38:09,343 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 19:38:09,343 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:09,344 INFO L85 PathProgramCache]: Analyzing trace with hash -496185918, now seen corresponding path program 38 times [2022-03-03 19:38:09,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:09,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744708110] [2022-03-03 19:38:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:10,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:10,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744708110] [2022-03-03 19:38:10,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744708110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:10,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354149695] [2022-03-03 19:38:10,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:38:10,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:10,058 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 19:38:10,058 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 19:38:10,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:38:10,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-03 19:38:10,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:10,223 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 19:38:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:10,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:10,291 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:38:10,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:38:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:10,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354149695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:10,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:10,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 40 [2022-03-03 19:38:10,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853227233] [2022-03-03 19:38:10,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:10,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:10,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:10,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:10,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:10,380 INFO L87 Difference]: Start difference. First operand 696 states and 1439 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:12,942 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2022-03-03 19:38:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:38:12,943 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-03 19:38:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:12,946 INFO L225 Difference]: With dead ends: 1425 [2022-03-03 19:38:12,946 INFO L226 Difference]: Without dead ends: 889 [2022-03-03 19:38:12,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:38:12,953 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 952 mSDsluCounter, 4014 mSDsCounter, 0 mSdLazyCounter, 3506 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 952 SdHoareTripleChecker+Valid, 1813 SdHoareTripleChecker+Invalid, 3733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:12,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [952 Valid, 1813 Invalid, 3733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3506 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:38:12,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-03-03 19:38:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2022-03-03 19:38:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 19:38:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2022-03-03 19:38:12,959 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2022-03-03 19:38:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:12,959 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2022-03-03 19:38:12,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2022-03-03 19:38:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-03 19:38:12,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:12,960 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:12,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:13,181 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 19:38:13,182 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:13,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1821183957, now seen corresponding path program 39 times [2022-03-03 19:38:13,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:13,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740513186] [2022-03-03 19:38:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:13,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:13,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:13,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740513186] [2022-03-03 19:38:13,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740513186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:13,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266287200] [2022-03-03 19:38:13,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:38:13,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:13,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:13,394 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 19:38:13,395 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 19:38:13,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-03 19:38:13,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:13,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-03 19:38:13,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:13,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:13,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266287200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:13,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:13,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 22 [2022-03-03 19:38:13,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723367882] [2022-03-03 19:38:13,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:13,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:38:13,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:38:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:38:13,594 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:13,691 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2022-03-03 19:38:13,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:38:13,692 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-03-03 19:38:13,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:13,694 INFO L225 Difference]: With dead ends: 923 [2022-03-03 19:38:13,694 INFO L226 Difference]: Without dead ends: 882 [2022-03-03 19:38:13,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:38:13,694 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 442 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:13,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 139 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:38:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-03-03 19:38:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2022-03-03 19:38:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 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 19:38:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2022-03-03 19:38:13,704 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2022-03-03 19:38:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:13,705 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2022-03-03 19:38:13,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2022-03-03 19:38:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-03 19:38:13,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:13,706 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:13,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:13,927 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 19:38:13,928 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:13,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1921782090, now seen corresponding path program 40 times [2022-03-03 19:38:13,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:13,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182003341] [2022-03-03 19:38:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:13,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:14,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:14,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182003341] [2022-03-03 19:38:14,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182003341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:14,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570837108] [2022-03-03 19:38:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:38:14,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:14,704 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 19:38:14,705 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 19:38:14,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:38:14,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:14,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-03 19:38:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:14,888 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 19:38:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:14,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:14,945 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:38:14,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:38:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:15,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570837108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:15,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:15,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2022-03-03 19:38:15,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860014056] [2022-03-03 19:38:15,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:15,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-03 19:38:15,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:15,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-03 19:38:15,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:38:15,029 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:17,827 INFO L93 Difference]: Finished difference Result 1559 states and 3067 transitions. [2022-03-03 19:38:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 19:38:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-03 19:38:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:17,830 INFO L225 Difference]: With dead ends: 1559 [2022-03-03 19:38:17,830 INFO L226 Difference]: Without dead ends: 975 [2022-03-03 19:38:17,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1003, Invalid=5803, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 19:38:17,830 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1042 mSDsluCounter, 4435 mSDsCounter, 0 mSdLazyCounter, 3870 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 4119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 3870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:17,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1042 Valid, 1998 Invalid, 4119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 3870 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:38:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-03 19:38:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 116. [2022-03-03 19:38:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 19:38:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 226 transitions. [2022-03-03 19:38:17,835 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 226 transitions. Word has length 49 [2022-03-03 19:38:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:17,835 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 226 transitions. [2022-03-03 19:38:17,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 226 transitions. [2022-03-03 19:38:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-03 19:38:17,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:17,836 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:17,852 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 19:38:18,037 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 19:38:18,037 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash 577375585, now seen corresponding path program 41 times [2022-03-03 19:38:18,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:18,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989420236] [2022-03-03 19:38:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:18,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:18,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989420236] [2022-03-03 19:38:18,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989420236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:18,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266817356] [2022-03-03 19:38:18,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:38:18,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:18,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:18,302 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 19:38:18,303 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 19:38:18,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-03 19:38:18,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:18,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-03 19:38:18,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:18,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:18,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266817356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:18,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:18,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 23 [2022-03-03 19:38:18,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363956448] [2022-03-03 19:38:18,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:18,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:38:18,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:38:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:38:18,588 INFO L87 Difference]: Start difference. First operand 116 states and 226 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:18,718 INFO L93 Difference]: Finished difference Result 1000 states and 1925 transitions. [2022-03-03 19:38:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:38:18,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-03 19:38:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:18,721 INFO L225 Difference]: With dead ends: 1000 [2022-03-03 19:38:18,721 INFO L226 Difference]: Without dead ends: 957 [2022-03-03 19:38:18,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:38:18,722 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 322 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:18,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 158 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:38:18,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-03-03 19:38:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 831. [2022-03-03 19:38:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.066265060240964) internal successors, (1715), 830 states have internal predecessors, (1715), 0 states have call successors, (0), 0 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 19:38:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1715 transitions. [2022-03-03 19:38:18,733 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1715 transitions. Word has length 50 [2022-03-03 19:38:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:18,733 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1715 transitions. [2022-03-03 19:38:18,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1715 transitions. [2022-03-03 19:38:18,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-03 19:38:18,734 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:18,735 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:18,758 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 19:38:18,955 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 19:38:18,956 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:18,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1525368830, now seen corresponding path program 42 times [2022-03-03 19:38:18,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:18,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956887687] [2022-03-03 19:38:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:18,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:19,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:19,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956887687] [2022-03-03 19:38:19,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956887687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:19,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085872530] [2022-03-03 19:38:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:38:19,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:19,844 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 19:38:19,845 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 19:38:19,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-03 19:38:19,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-03 19:38:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:22,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:22,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:38:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 210 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:22,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:24,031 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:38:24,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-03-03 19:38:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 190 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:24,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085872530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:24,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:24,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 107 [2022-03-03 19:38:24,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878756565] [2022-03-03 19:38:24,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:24,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-03 19:38:24,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-03 19:38:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1958, Invalid=9598, Unknown=0, NotChecked=0, Total=11556 [2022-03-03 19:38:24,073 INFO L87 Difference]: Start difference. First operand 831 states and 1715 transitions. Second operand has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 19:38:57,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:57,199 INFO L93 Difference]: Finished difference Result 23444 states and 61253 transitions. [2022-03-03 19:38:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 314 states. [2022-03-03 19:38:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-03 19:38:57,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:57,265 INFO L225 Difference]: With dead ends: 23444 [2022-03-03 19:38:57,266 INFO L226 Difference]: Without dead ends: 23424 [2022-03-03 19:38:57,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 304 SyntacticMatches, 39 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39693 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=39410, Invalid=118596, Unknown=0, NotChecked=0, Total=158006 [2022-03-03 19:38:57,278 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 2335 mSDsluCounter, 2333 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2335 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 5557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3753 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:57,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2335 Valid, 1733 Invalid, 5557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1500 Invalid, 0 Unknown, 3753 Unchecked, 0.6s Time] [2022-03-03 19:38:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23424 states. [2022-03-03 19:38:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23424 to 2912. [2022-03-03 19:38:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 2.737890759189282) internal successors, (7970), 2911 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7970 transitions. [2022-03-03 19:38:57,492 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7970 transitions. Word has length 51 [2022-03-03 19:38:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:57,493 INFO L470 AbstractCegarLoop]: Abstraction has 2912 states and 7970 transitions. [2022-03-03 19:38:57,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.1203703703703705) internal successors, (121), 107 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 19:38:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7970 transitions. [2022-03-03 19:38:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-03 19:38:57,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:57,499 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:57,520 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 19:38:57,715 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 19:38:57,715 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1381478300, now seen corresponding path program 43 times [2022-03-03 19:38:57,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:57,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388303726] [2022-03-03 19:38:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:58,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:58,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388303726] [2022-03-03 19:38:58,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388303726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:58,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825612782] [2022-03-03 19:38:58,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:38:58,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:58,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:58,643 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 19:38:58,644 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 19:38:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:58,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-03 19:38:58,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:58,831 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 19:38:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:58,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:58,888 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:38:58,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:38:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:58,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825612782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:58,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:58,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 44 [2022-03-03 19:38:58,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685239639] [2022-03-03 19:38:58,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:58,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:38:58,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:38:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:38:58,995 INFO L87 Difference]: Start difference. First operand 2912 states and 7970 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:02,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:02,226 INFO L93 Difference]: Finished difference Result 13727 states and 39493 transitions. [2022-03-03 19:39:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:39:02,226 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-03 19:39:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:02,260 INFO L225 Difference]: With dead ends: 13727 [2022-03-03 19:39:02,260 INFO L226 Difference]: Without dead ends: 13092 [2022-03-03 19:39:02,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:39:02,262 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1137 mSDsluCounter, 4877 mSDsCounter, 0 mSdLazyCounter, 4252 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 2192 SdHoareTripleChecker+Invalid, 4524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:02,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 2192 Invalid, 4524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4252 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:39:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13092 states. [2022-03-03 19:39:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13092 to 2284. [2022-03-03 19:39:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.924222514235655) internal successors, (6676), 2283 states have internal predecessors, (6676), 0 states have call successors, (0), 0 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 19:39:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6676 transitions. [2022-03-03 19:39:02,366 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6676 transitions. Word has length 51 [2022-03-03 19:39:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:02,366 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 6676 transitions. [2022-03-03 19:39:02,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6676 transitions. [2022-03-03 19:39:02,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-03 19:39:02,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:02,371 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:02,395 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 19:39:02,586 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 19:39:02,587 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:02,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash 125175287, now seen corresponding path program 44 times [2022-03-03 19:39:02,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:02,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97999684] [2022-03-03 19:39:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:02,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:02,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:02,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97999684] [2022-03-03 19:39:02,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97999684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:02,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705909028] [2022-03-03 19:39:02,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:39:02,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:02,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:02,867 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 19:39:02,867 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 19:39:02,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:39:02,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:02,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-03 19:39:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:03,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:03,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705909028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:03,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:03,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 24 [2022-03-03 19:39:03,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782908326] [2022-03-03 19:39:03,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:03,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:39:03,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:03,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:39:03,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:39:03,128 INFO L87 Difference]: Start difference. First operand 2284 states and 6676 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:03,306 INFO L93 Difference]: Finished difference Result 12753 states and 36993 transitions. [2022-03-03 19:39:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:39:03,306 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-03-03 19:39:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:03,331 INFO L225 Difference]: With dead ends: 12753 [2022-03-03 19:39:03,332 INFO L226 Difference]: Without dead ends: 12686 [2022-03-03 19:39:03,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:39:03,332 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 300 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:03,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 185 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:39:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2022-03-03 19:39:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 1717. [2022-03-03 19:39:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 2.346736596736597) internal successors, (4027), 1716 states have internal predecessors, (4027), 0 states have call successors, (0), 0 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 19:39:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 4027 transitions. [2022-03-03 19:39:03,459 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 4027 transitions. Word has length 52 [2022-03-03 19:39:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:03,459 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 4027 transitions. [2022-03-03 19:39:03,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 4027 transitions. [2022-03-03 19:39:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-03 19:39:03,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:03,462 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:03,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 19:39:03,679 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 19:39:03,680 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2121468938, now seen corresponding path program 45 times [2022-03-03 19:39:03,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:03,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600338355] [2022-03-03 19:39:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:04,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:04,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600338355] [2022-03-03 19:39:04,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600338355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:04,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535839354] [2022-03-03 19:39:04,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:39:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:04,670 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:39:04,673 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 19:39:04,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-03 19:39:04,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:04,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-03 19:39:04,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:04,875 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 19:39:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:04,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:04,935 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:39:04,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:39:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:05,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535839354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:05,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:05,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 46 [2022-03-03 19:39:05,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563254723] [2022-03-03 19:39:05,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:05,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-03 19:39:05,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-03 19:39:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:39:05,031 INFO L87 Difference]: Start difference. First operand 1717 states and 4027 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:08,521 INFO L93 Difference]: Finished difference Result 2659 states and 5800 transitions. [2022-03-03 19:39:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:39:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-03 19:39:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:08,524 INFO L225 Difference]: With dead ends: 2659 [2022-03-03 19:39:08,524 INFO L226 Difference]: Without dead ends: 1720 [2022-03-03 19:39:08,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:39:08,525 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 1234 mSDsluCounter, 5340 mSDsCounter, 0 mSdLazyCounter, 4652 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 4948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 4652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:08,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 2395 Invalid, 4948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 4652 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:39:08,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2022-03-03 19:39:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 126. [2022-03-03 19:39:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2022-03-03 19:39:08,532 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2022-03-03 19:39:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:08,532 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2022-03-03 19:39:08,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2022-03-03 19:39:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-03 19:39:08,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:08,533 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:08,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:08,743 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 19:39:08,743 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:08,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:08,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1317949407, now seen corresponding path program 46 times [2022-03-03 19:39:08,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:08,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018720933] [2022-03-03 19:39:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:09,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:09,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018720933] [2022-03-03 19:39:09,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018720933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:09,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893545961] [2022-03-03 19:39:09,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:39:09,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:09,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:09,032 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 19:39:09,032 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 19:39:09,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:39:09,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-03 19:39:09,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:09,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:09,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893545961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:09,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:09,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 25 [2022-03-03 19:39:09,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702430812] [2022-03-03 19:39:09,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:09,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:39:09,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:39:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:39:09,273 INFO L87 Difference]: Start difference. First operand 126 states and 246 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 19:39:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:09,392 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2022-03-03 19:39:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:39:09,392 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 54 [2022-03-03 19:39:09,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:09,393 INFO L225 Difference]: With dead ends: 1163 [2022-03-03 19:39:09,393 INFO L226 Difference]: Without dead ends: 1116 [2022-03-03 19:39:09,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:39:09,394 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 363 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:09,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 178 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:39:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-03 19:39:09,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2022-03-03 19:39:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 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 19:39:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2022-03-03 19:39:09,405 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2022-03-03 19:39:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:09,406 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2022-03-03 19:39:09,406 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 19:39:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2022-03-03 19:39:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-03 19:39:09,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:09,407 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:09,433 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 19:39:09,628 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 19:39:09,629 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:09,629 INFO L85 PathProgramCache]: Analyzing trace with hash 865346114, now seen corresponding path program 47 times [2022-03-03 19:39:09,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:09,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998542050] [2022-03-03 19:39:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:09,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:10,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:10,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998542050] [2022-03-03 19:39:10,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998542050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:10,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282273239] [2022-03-03 19:39:10,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:39:10,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:10,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:10,598 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 19:39:10,599 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 19:39:10,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-03-03 19:39:10,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:10,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-03 19:39:10,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:13,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:13,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:39:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 253 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:13,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:15,513 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:39:15,514 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 12 treesize of output 11 [2022-03-03 19:39:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 231 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:15,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282273239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:15,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:15,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 117 [2022-03-03 19:39:15,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349209049] [2022-03-03 19:39:15,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:15,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-03 19:39:15,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:15,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-03 19:39:15,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2328, Invalid=11478, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 19:39:15,560 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 19:39:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:47,714 INFO L93 Difference]: Finished difference Result 31092 states and 79654 transitions. [2022-03-03 19:39:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 344 states. [2022-03-03 19:39:47,714 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-03 19:39:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:47,777 INFO L225 Difference]: With dead ends: 31092 [2022-03-03 19:39:47,777 INFO L226 Difference]: Without dead ends: 31070 [2022-03-03 19:39:47,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44354 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=42868, Invalid=146792, Unknown=0, NotChecked=0, Total=189660 [2022-03-03 19:39:47,786 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1991 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:47,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 1764 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 62 Unchecked, 0.0s Time] [2022-03-03 19:39:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31070 states. [2022-03-03 19:39:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31070 to 3434. [2022-03-03 19:39:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 2.7302650742790564) internal successors, (9373), 3433 states have internal predecessors, (9373), 0 states have call successors, (0), 0 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 19:39:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9373 transitions. [2022-03-03 19:39:48,020 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9373 transitions. Word has length 55 [2022-03-03 19:39:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:48,021 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 9373 transitions. [2022-03-03 19:39:48,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 117 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 19:39:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9373 transitions. [2022-03-03 19:39:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-03 19:39:48,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:48,027 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:48,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:48,249 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 19:39:48,250 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1009236644, now seen corresponding path program 48 times [2022-03-03 19:39:48,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:48,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042405522] [2022-03-03 19:39:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:48,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:49,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:49,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042405522] [2022-03-03 19:39:49,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042405522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:49,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061372463] [2022-03-03 19:39:49,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:39:49,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:49,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:49,269 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:39:49,270 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 19:39:49,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-03 19:39:49,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:49,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-03 19:39:49,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:49,468 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 19:39:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:49,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:49,528 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:39:49,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:39:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:49,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061372463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:49,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:49,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 48 [2022-03-03 19:39:49,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381977149] [2022-03-03 19:39:49,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:49,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:39:49,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:49,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:39:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:39:49,636 INFO L87 Difference]: Start difference. First operand 3434 states and 9373 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:53,534 INFO L93 Difference]: Finished difference Result 4736 states and 12391 transitions. [2022-03-03 19:39:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:39:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-03-03 19:39:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:53,541 INFO L225 Difference]: With dead ends: 4736 [2022-03-03 19:39:53,541 INFO L226 Difference]: Without dead ends: 3995 [2022-03-03 19:39:53,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 19:39:53,542 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1337 mSDsluCounter, 5824 mSDsCounter, 0 mSdLazyCounter, 5070 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 2607 SdHoareTripleChecker+Invalid, 5391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 5070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:53,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1337 Valid, 2607 Invalid, 5391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 5070 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:39:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2022-03-03 19:39:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 2842. [2022-03-03 19:39:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.9489616332277366) internal successors, (8378), 2841 states have internal predecessors, (8378), 0 states have call successors, (0), 0 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 19:39:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 8378 transitions. [2022-03-03 19:39:53,593 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 8378 transitions. Word has length 55 [2022-03-03 19:39:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:53,593 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 8378 transitions. [2022-03-03 19:39:53,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 8378 transitions. [2022-03-03 19:39:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-03 19:39:53,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:53,599 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:53,625 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 19:39:53,805 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 19:39:53,805 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:53,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1222894519, now seen corresponding path program 49 times [2022-03-03 19:39:53,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:53,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910862285] [2022-03-03 19:39:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:54,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:54,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910862285] [2022-03-03 19:39:54,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910862285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:54,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818521538] [2022-03-03 19:39:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:39:54,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:54,116 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 19:39:54,117 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 19:39:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-03 19:39:54,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:54,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:54,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818521538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:54,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:54,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 26 [2022-03-03 19:39:54,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586798875] [2022-03-03 19:39:54,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:54,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:39:54,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:39:54,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:39:54,380 INFO L87 Difference]: Start difference. First operand 2842 states and 8378 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:54,544 INFO L93 Difference]: Finished difference Result 17396 states and 50779 transitions. [2022-03-03 19:39:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:39:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-03-03 19:39:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:54,583 INFO L225 Difference]: With dead ends: 17396 [2022-03-03 19:39:54,583 INFO L226 Difference]: Without dead ends: 17323 [2022-03-03 19:39:54,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:39:54,583 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 471 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:54,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 167 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:39:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17323 states. [2022-03-03 19:39:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17323 to 1975. [2022-03-03 19:39:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 2.3541033434650456) internal successors, (4647), 1974 states have internal predecessors, (4647), 0 states have call successors, (0), 0 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 19:39:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 4647 transitions. [2022-03-03 19:39:54,715 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 4647 transitions. Word has length 56 [2022-03-03 19:39:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:54,716 INFO L470 AbstractCegarLoop]: Abstraction has 1975 states and 4647 transitions. [2022-03-03 19:39:54,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 4647 transitions. [2022-03-03 19:39:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-03 19:39:54,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:54,718 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:54,740 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 19:39:54,939 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 19:39:54,939 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:54,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:54,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1013008074, now seen corresponding path program 50 times [2022-03-03 19:39:54,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:54,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719717979] [2022-03-03 19:39:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:54,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:56,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:56,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719717979] [2022-03-03 19:39:56,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719717979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:56,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387976491] [2022-03-03 19:39:56,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:39:56,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:56,069 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 19:39:56,070 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 19:39:56,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:39:56,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-03 19:39:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:56,264 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 19:39:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:56,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:56,328 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:39:56,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:39:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:56,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387976491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:56,447 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:56,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 50 [2022-03-03 19:39:56,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517224800] [2022-03-03 19:39:56,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:56,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-03 19:39:56,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-03 19:39:56,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:39:56,448 INFO L87 Difference]: Start difference. First operand 1975 states and 4647 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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 19:40:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:00,636 INFO L93 Difference]: Finished difference Result 3074 states and 6724 transitions. [2022-03-03 19:40:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:40:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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 57 [2022-03-03 19:40:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:00,639 INFO L225 Difference]: With dead ends: 3074 [2022-03-03 19:40:00,639 INFO L226 Difference]: Without dead ends: 1978 [2022-03-03 19:40:00,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 19:40:00,642 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1442 mSDsluCounter, 6329 mSDsCounter, 0 mSdLazyCounter, 5506 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 2828 SdHoareTripleChecker+Invalid, 5853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 5506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:00,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1442 Valid, 2828 Invalid, 5853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 5506 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-03 19:40:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-03-03 19:40:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 136. [2022-03-03 19:40:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 135 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 19:40:00,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2022-03-03 19:40:00,648 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2022-03-03 19:40:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:00,648 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2022-03-03 19:40:00,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 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 19:40:00,648 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2022-03-03 19:40:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-03 19:40:00,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:00,649 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:00,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-03 19:40:00,849 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 19:40:00,849 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:00,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1315400991, now seen corresponding path program 51 times [2022-03-03 19:40:00,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:00,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936068253] [2022-03-03 19:40:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:01,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:01,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936068253] [2022-03-03 19:40:01,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936068253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:01,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260821117] [2022-03-03 19:40:01,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:40:01,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:01,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:01,156 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 19:40:01,157 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 19:40:01,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-03-03 19:40:01,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-03 19:40:01,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:01,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:01,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260821117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:01,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:01,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 27 [2022-03-03 19:40:01,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153627719] [2022-03-03 19:40:01,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:01,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:40:01,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:01,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:40:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:40:01,405 INFO L87 Difference]: Start difference. First operand 136 states and 266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 19:40:01,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:01,527 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2022-03-03 19:40:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:40:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 58 [2022-03-03 19:40:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:01,529 INFO L225 Difference]: With dead ends: 1338 [2022-03-03 19:40:01,529 INFO L226 Difference]: Without dead ends: 1287 [2022-03-03 19:40:01,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:40:01,530 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 539 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:01,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 162 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:40:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-03-03 19:40:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2022-03-03 19:40:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.0589788732394365) internal successors, (2339), 1136 states have internal predecessors, (2339), 0 states have call successors, (0), 0 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 19:40:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2022-03-03 19:40:01,542 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2022-03-03 19:40:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:01,542 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2022-03-03 19:40:01,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 19:40:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2022-03-03 19:40:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-03 19:40:01,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:01,544 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:01,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:01,758 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 19:40:01,758 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:01,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1694299006, now seen corresponding path program 52 times [2022-03-03 19:40:01,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:01,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299934947] [2022-03-03 19:40:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:01,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:02,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:02,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299934947] [2022-03-03 19:40:02,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299934947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:02,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191243435] [2022-03-03 19:40:02,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:40:02,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:02,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:02,894 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:02,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:40:02,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:40:02,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-03 19:40:02,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:03,099 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 19:40:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:03,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:03,164 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:40:03,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:40:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:03,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191243435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:03,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:03,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 52 [2022-03-03 19:40:03,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548616667] [2022-03-03 19:40:03,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:03,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-03 19:40:03,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-03 19:40:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:40:03,273 INFO L87 Difference]: Start difference. First operand 1137 states and 2339 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:07,861 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2022-03-03 19:40:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:40:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-03-03 19:40:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:07,864 INFO L225 Difference]: With dead ends: 2319 [2022-03-03 19:40:07,864 INFO L226 Difference]: Without dead ends: 1465 [2022-03-03 19:40:07,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:40:07,864 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1552 mSDsluCounter, 6855 mSDsCounter, 0 mSdLazyCounter, 5960 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 6334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 5960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:07,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 3058 Invalid, 6334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 5960 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-03 19:40:07,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-03-03 19:40:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2022-03-03 19:40:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 19:40:07,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2022-03-03 19:40:07,869 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2022-03-03 19:40:07,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:07,869 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2022-03-03 19:40:07,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2022-03-03 19:40:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-03 19:40:07,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:07,870 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:07,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-03 19:40:08,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-03 19:40:08,070 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:08,070 INFO L85 PathProgramCache]: Analyzing trace with hash -960583403, now seen corresponding path program 53 times [2022-03-03 19:40:08,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:08,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074465251] [2022-03-03 19:40:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:08,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:08,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:08,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074465251] [2022-03-03 19:40:08,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074465251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:08,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810027397] [2022-03-03 19:40:08,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:40:08,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:08,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:08,441 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:08,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:40:08,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-03-03 19:40:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:08,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-03 19:40:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:08,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:08,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810027397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:08,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:08,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 28 [2022-03-03 19:40:08,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357715221] [2022-03-03 19:40:08,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:08,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:40:08,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:40:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:40:08,694 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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 19:40:08,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:08,850 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2022-03-03 19:40:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:40:08,851 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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 60 [2022-03-03 19:40:08,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:08,852 INFO L225 Difference]: With dead ends: 1430 [2022-03-03 19:40:08,852 INFO L226 Difference]: Without dead ends: 1377 [2022-03-03 19:40:08,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:40:08,852 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 344 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:08,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 213 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:40:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-03-03 19:40:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2022-03-03 19:40:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 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 19:40:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2022-03-03 19:40:08,864 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2022-03-03 19:40:08,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:08,864 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2022-03-03 19:40:08,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 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 19:40:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2022-03-03 19:40:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-03 19:40:08,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:08,865 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:08,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:09,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 19:40:09,076 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash -9355658, now seen corresponding path program 54 times [2022-03-03 19:40:09,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:09,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445397037] [2022-03-03 19:40:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:09,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:10,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:10,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445397037] [2022-03-03 19:40:10,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445397037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:10,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882879025] [2022-03-03 19:40:10,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:40:10,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:10,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:10,350 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:10,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:40:10,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-03 19:40:10,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:10,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-03 19:40:10,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:10,576 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 19:40:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:10,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:10,645 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:40:10,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:40:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:10,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882879025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:10,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:10,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 54 [2022-03-03 19:40:10,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113761433] [2022-03-03 19:40:10,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:10,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-03 19:40:10,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:10,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-03 19:40:10,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:40:10,758 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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 19:40:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:15,784 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2022-03-03 19:40:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:40:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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 61 [2022-03-03 19:40:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:15,786 INFO L225 Difference]: With dead ends: 2489 [2022-03-03 19:40:15,786 INFO L226 Difference]: Without dead ends: 1575 [2022-03-03 19:40:15,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:40:15,787 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1666 mSDsluCounter, 7402 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 3297 SdHoareTripleChecker+Invalid, 6834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:15,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1666 Valid, 3297 Invalid, 6834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-03 19:40:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-03-03 19:40:15,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2022-03-03 19:40:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 19:40:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2022-03-03 19:40:15,794 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2022-03-03 19:40:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:15,794 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2022-03-03 19:40:15,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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 19:40:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2022-03-03 19:40:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-03 19:40:15,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:15,795 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:15,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:16,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:16,017 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash -266947167, now seen corresponding path program 55 times [2022-03-03 19:40:16,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:16,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643053185] [2022-03-03 19:40:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:16,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:16,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:16,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643053185] [2022-03-03 19:40:16,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643053185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:16,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485990457] [2022-03-03 19:40:16,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:40:16,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:16,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:16,372 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:16,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:40:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:16,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-03 19:40:16,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:16,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:16,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485990457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:16,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:16,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 29 [2022-03-03 19:40:16,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789124767] [2022-03-03 19:40:16,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:16,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:40:16,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:16,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:40:16,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:40:16,667 INFO L87 Difference]: Start difference. First operand 146 states and 286 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 19:40:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:16,819 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2022-03-03 19:40:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:40:16,819 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 62 [2022-03-03 19:40:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:16,821 INFO L225 Difference]: With dead ends: 1525 [2022-03-03 19:40:16,821 INFO L226 Difference]: Without dead ends: 1470 [2022-03-03 19:40:16,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:40:16,821 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 471 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:16,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 201 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:40:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-03-03 19:40:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2022-03-03 19:40:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 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 19:40:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2022-03-03 19:40:16,832 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2022-03-03 19:40:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:16,833 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2022-03-03 19:40:16,833 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 19:40:16,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2022-03-03 19:40:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-03 19:40:16,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:16,834 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:16,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:17,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:17,051 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:17,052 INFO L85 PathProgramCache]: Analyzing trace with hash -965118270, now seen corresponding path program 56 times [2022-03-03 19:40:17,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:17,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066519218] [2022-03-03 19:40:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:17,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:18,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:18,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066519218] [2022-03-03 19:40:18,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066519218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:18,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668976726] [2022-03-03 19:40:18,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:40:18,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:18,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:18,433 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:18,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:40:18,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:40:18,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:18,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-03 19:40:18,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:18,656 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 19:40:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:18,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:18,724 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:40:18,725 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 14 treesize of output 13 [2022-03-03 19:40:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:18,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668976726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:18,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:18,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 56 [2022-03-03 19:40:18,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122305223] [2022-03-03 19:40:18,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:18,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-03 19:40:18,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-03 19:40:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:40:18,840 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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 19:40:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:24,221 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2022-03-03 19:40:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:40:24,222 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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 63 [2022-03-03 19:40:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:24,224 INFO L225 Difference]: With dead ends: 2665 [2022-03-03 19:40:24,224 INFO L226 Difference]: Without dead ends: 1689 [2022-03-03 19:40:24,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2022-03-03 19:40:24,224 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1784 mSDsluCounter, 7970 mSDsCounter, 0 mSdLazyCounter, 6922 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1784 SdHoareTripleChecker+Valid, 3545 SdHoareTripleChecker+Invalid, 7353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 6922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:24,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1784 Valid, 3545 Invalid, 7353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 6922 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-03 19:40:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-03-03 19:40:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2022-03-03 19:40:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 19:40:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2022-03-03 19:40:24,230 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2022-03-03 19:40:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:24,230 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2022-03-03 19:40:24,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 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 19:40:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2022-03-03 19:40:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-03 19:40:24,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:24,231 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:24,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-03 19:40:24,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:24,431 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:24,431 INFO L85 PathProgramCache]: Analyzing trace with hash 169182933, now seen corresponding path program 57 times [2022-03-03 19:40:24,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:24,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173772140] [2022-03-03 19:40:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:24,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:24,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:24,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173772140] [2022-03-03 19:40:24,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173772140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:24,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20930244] [2022-03-03 19:40:24,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:40:24,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:24,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:24,823 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:24,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:40:24,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-03 19:40:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-03 19:40:24,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:24,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:25,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20930244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:25,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:25,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 30 [2022-03-03 19:40:25,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249269522] [2022-03-03 19:40:25,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:25,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:40:25,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:40:25,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:40:25,122 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:25,281 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2022-03-03 19:40:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:40:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-03-03 19:40:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:25,282 INFO L225 Difference]: With dead ends: 1623 [2022-03-03 19:40:25,282 INFO L226 Difference]: Without dead ends: 1566 [2022-03-03 19:40:25,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:40:25,283 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 486 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:25,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 256 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:40:25,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-03-03 19:40:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2022-03-03 19:40:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 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 19:40:25,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2022-03-03 19:40:25,296 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2022-03-03 19:40:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:25,297 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2022-03-03 19:40:25,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2022-03-03 19:40:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-03 19:40:25,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:25,298 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:25,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:25,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-03 19:40:25,511 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:25,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash -758348874, now seen corresponding path program 58 times [2022-03-03 19:40:25,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:25,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269565379] [2022-03-03 19:40:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:26,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:26,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269565379] [2022-03-03 19:40:26,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269565379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:26,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567049856] [2022-03-03 19:40:26,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:40:26,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:26,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:26,897 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:26,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:40:26,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:40:26,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-03 19:40:26,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:27,127 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 19:40:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:27,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:27,219 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:40:27,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:40:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:27,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567049856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:27,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:27,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 58 [2022-03-03 19:40:27,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394669348] [2022-03-03 19:40:27,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:27,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-03 19:40:27,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:27,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-03 19:40:27,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:40:27,341 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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 19:40:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:33,186 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2022-03-03 19:40:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 19:40:33,186 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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 65 [2022-03-03 19:40:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:33,189 INFO L225 Difference]: With dead ends: 2847 [2022-03-03 19:40:33,189 INFO L226 Difference]: Without dead ends: 1807 [2022-03-03 19:40:33,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 19:40:33,190 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1906 mSDsluCounter, 8559 mSDsCounter, 0 mSdLazyCounter, 7430 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 7891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 7430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:33,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 3802 Invalid, 7891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 7430 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-03 19:40:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-03-03 19:40:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2022-03-03 19:40:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 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 19:40:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2022-03-03 19:40:33,195 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2022-03-03 19:40:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:33,195 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2022-03-03 19:40:33,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 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 19:40:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2022-03-03 19:40:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-03 19:40:33,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:33,196 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:33,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-03 19:40:33,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-03 19:40:33,396 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2010900383, now seen corresponding path program 59 times [2022-03-03 19:40:33,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:33,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782019595] [2022-03-03 19:40:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:33,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:33,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782019595] [2022-03-03 19:40:33,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782019595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:33,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830720145] [2022-03-03 19:40:33,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:40:33,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:33,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:33,790 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:33,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:40:33,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-03 19:40:33,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:33,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-03 19:40:33,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:33,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:34,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830720145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:34,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:34,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 31 [2022-03-03 19:40:34,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406445618] [2022-03-03 19:40:34,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:34,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:40:34,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:34,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:40:34,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:40:34,138 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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 19:40:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:34,323 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2022-03-03 19:40:34,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:40:34,324 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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 66 [2022-03-03 19:40:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:34,325 INFO L225 Difference]: With dead ends: 1724 [2022-03-03 19:40:34,325 INFO L226 Difference]: Without dead ends: 1665 [2022-03-03 19:40:34,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:40:34,325 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 552 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:34,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 213 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:40:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-03-03 19:40:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2022-03-03 19:40:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 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 19:40:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2022-03-03 19:40:34,341 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2022-03-03 19:40:34,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:34,341 INFO L470 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2022-03-03 19:40:34,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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 19:40:34,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2022-03-03 19:40:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-03 19:40:34,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:34,343 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:34,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:34,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:34,562 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash -15769342, now seen corresponding path program 60 times [2022-03-03 19:40:34,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:34,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631786439] [2022-03-03 19:40:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:34,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:36,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:36,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631786439] [2022-03-03 19:40:36,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631786439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:36,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201215021] [2022-03-03 19:40:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:40:36,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:36,089 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:40:36,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:40:36,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-03 19:40:36,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:36,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-03 19:40:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:40,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:40,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:40:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 406 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:40,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:43,612 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:40:43,613 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 12 treesize of output 11 [2022-03-03 19:40:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 378 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:43,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201215021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:43,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:43,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 147 [2022-03-03 19:40:43,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800643270] [2022-03-03 19:40:43,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:43,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-03-03 19:40:43,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:43,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-03-03 19:40:43,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3630, Invalid=18126, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 19:40:43,668 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 148 states, 148 states have (on average 1.087837837837838) internal successors, (161), 147 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 19:42:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:38,797 INFO L93 Difference]: Finished difference Result 12289 states and 29363 transitions. [2022-03-03 19:42:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 551 states. [2022-03-03 19:42:38,798 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.087837837837838) internal successors, (161), 147 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-03-03 19:42:38,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:38,810 INFO L225 Difference]: With dead ends: 12289 [2022-03-03 19:42:38,811 INFO L226 Difference]: Without dead ends: 12201 [2022-03-03 19:42:38,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1273 GetRequests, 534 SyntacticMatches, 74 SemanticMatches, 665 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 119086 ImplicationChecksByTransitivity, 74.6s TimeCoverageRelationStatistics Valid=115543, Invalid=328679, Unknown=0, NotChecked=0, Total=444222 [2022-03-03 19:42:38,831 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 4729 mSDsluCounter, 7518 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4729 SdHoareTripleChecker+Valid, 6478 SdHoareTripleChecker+Invalid, 7947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4462 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:38,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4729 Valid, 6478 Invalid, 7947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 2912 Invalid, 0 Unknown, 4462 Unchecked, 1.1s Time] [2022-03-03 19:42:38,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12201 states. [2022-03-03 19:42:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12201 to 6563. [2022-03-03 19:42:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6563 states, 6562 states have (on average 2.7796403535507466) internal successors, (18240), 6562 states have internal predecessors, (18240), 0 states have call successors, (0), 0 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 19:42:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6563 states to 6563 states and 18240 transitions. [2022-03-03 19:42:38,937 INFO L78 Accepts]: Start accepts. Automaton has 6563 states and 18240 transitions. Word has length 67 [2022-03-03 19:42:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:38,937 INFO L470 AbstractCegarLoop]: Abstraction has 6563 states and 18240 transitions. [2022-03-03 19:42:38,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.087837837837838) internal successors, (161), 147 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 19:42:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6563 states and 18240 transitions. [2022-03-03 19:42:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-03 19:42:38,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:38,947 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:38,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-03 19:42:39,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:39,147 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:39,148 INFO L85 PathProgramCache]: Analyzing trace with hash 128121188, now seen corresponding path program 61 times [2022-03-03 19:42:39,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:39,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283717479] [2022-03-03 19:42:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:39,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:40,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:40,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283717479] [2022-03-03 19:42:40,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283717479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:40,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554783271] [2022-03-03 19:42:40,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:42:40,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:40,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:40,615 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:40,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:42:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-03 19:42:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:40,850 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 19:42:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:40,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:40,920 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:42:40,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:42:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:41,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554783271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:41,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:41,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 60 [2022-03-03 19:42:41,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660583249] [2022-03-03 19:42:41,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:41,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-03 19:42:41,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-03 19:42:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:42:41,044 INFO L87 Difference]: Start difference. First operand 6563 states and 18240 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:47,506 INFO L93 Difference]: Finished difference Result 41199 states and 120567 transitions. [2022-03-03 19:42:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:42:47,506 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-03-03 19:42:47,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:47,584 INFO L225 Difference]: With dead ends: 41199 [2022-03-03 19:42:47,584 INFO L226 Difference]: Without dead ends: 40124 [2022-03-03 19:42:47,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:42:47,585 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 2030 mSDsluCounter, 9026 mSDsCounter, 0 mSdLazyCounter, 7868 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2030 SdHoareTripleChecker+Valid, 4010 SdHoareTripleChecker+Invalid, 8360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 7868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:47,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2030 Valid, 4010 Invalid, 8360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 7868 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-03 19:42:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40124 states. [2022-03-03 19:42:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40124 to 5233. [2022-03-03 19:42:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.9722859327217126) internal successors, (15551), 5232 states have internal predecessors, (15551), 0 states have call successors, (0), 0 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 19:42:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 15551 transitions. [2022-03-03 19:42:47,864 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 15551 transitions. Word has length 67 [2022-03-03 19:42:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:47,864 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 15551 transitions. [2022-03-03 19:42:47,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 15551 transitions. [2022-03-03 19:42:47,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-03 19:42:47,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:47,871 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:47,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-03 19:42:48,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:48,072 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:48,073 INFO L85 PathProgramCache]: Analyzing trace with hash -321880841, now seen corresponding path program 62 times [2022-03-03 19:42:48,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:48,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393177051] [2022-03-03 19:42:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:48,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:48,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:48,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393177051] [2022-03-03 19:42:48,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393177051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:48,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379075591] [2022-03-03 19:42:48,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:42:48,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:48,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:48,499 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:48,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:42:48,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:42:48,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-03 19:42:48,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:48,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:48,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379075591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:48,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:48,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 32 [2022-03-03 19:42:48,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656975353] [2022-03-03 19:42:48,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:48,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:42:48,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:48,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:42:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:42:48,780 INFO L87 Difference]: Start difference. First operand 5233 states and 15551 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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 19:42:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:49,052 INFO L93 Difference]: Finished difference Result 39442 states and 116421 transitions. [2022-03-03 19:42:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:42:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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 68 [2022-03-03 19:42:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:49,130 INFO L225 Difference]: With dead ends: 39442 [2022-03-03 19:42:49,130 INFO L226 Difference]: Without dead ends: 39381 [2022-03-03 19:42:49,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:42:49,130 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 678 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:49,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 215 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:42:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39381 states. [2022-03-03 19:42:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39381 to 2944. [2022-03-03 19:42:49,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2944 states, 2943 states have (on average 2.359157322460075) internal successors, (6943), 2943 states have internal predecessors, (6943), 0 states have call successors, (0), 0 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 19:42:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2944 states to 2944 states and 6943 transitions. [2022-03-03 19:42:49,473 INFO L78 Accepts]: Start accepts. Automaton has 2944 states and 6943 transitions. Word has length 68 [2022-03-03 19:42:49,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:49,473 INFO L470 AbstractCegarLoop]: Abstraction has 2944 states and 6943 transitions. [2022-03-03 19:42:49,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 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 19:42:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2944 states and 6943 transitions. [2022-03-03 19:42:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-03 19:42:49,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:49,476 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:49,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:49,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:49,691 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:49,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1299745014, now seen corresponding path program 63 times [2022-03-03 19:42:49,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:49,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932206436] [2022-03-03 19:42:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:49,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:51,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:51,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932206436] [2022-03-03 19:42:51,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932206436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:51,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353210107] [2022-03-03 19:42:51,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:42:51,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:51,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:51,275 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:51,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:42:51,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-03 19:42:51,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:51,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-03 19:42:51,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:55,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:55,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:42:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 435 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:55,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:59,463 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:42:59,464 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 12 treesize of output 11 [2022-03-03 19:42:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 406 proven. 524 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:59,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353210107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:59,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:59,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 152 [2022-03-03 19:42:59,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619774791] [2022-03-03 19:42:59,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:59,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-03 19:42:59,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-03 19:42:59,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3875, Invalid=19381, Unknown=0, NotChecked=0, Total=23256 [2022-03-03 19:42:59,538 INFO L87 Difference]: Start difference. First operand 2944 states and 6943 transitions. Second operand has 153 states, 153 states have (on average 1.0849673202614378) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 19:45:04,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:04,186 INFO L93 Difference]: Finished difference Result 93673 states and 239805 transitions. [2022-03-03 19:45:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 584 states. [2022-03-03 19:45:04,187 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.0849673202614378) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-03-03 19:45:04,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:04,358 INFO L225 Difference]: With dead ends: 93673 [2022-03-03 19:45:04,358 INFO L226 Difference]: Without dead ends: 93644 [2022-03-03 19:45:04,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1322 GetRequests, 566 SyntacticMatches, 54 SemanticMatches, 702 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144248 ImplicationChecksByTransitivity, 73.7s TimeCoverageRelationStatistics Valid=129650, Invalid=365262, Unknown=0, NotChecked=0, Total=494912 [2022-03-03 19:45:04,379 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 4738 mSDsluCounter, 4516 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4738 SdHoareTripleChecker+Valid, 3243 SdHoareTripleChecker+Invalid, 9451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6027 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:04,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4738 Valid, 3243 Invalid, 9451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 2866 Invalid, 0 Unknown, 6027 Unchecked, 1.1s Time] [2022-03-03 19:45:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93644 states. [2022-03-03 19:45:05,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93644 to 8584. [2022-03-03 19:45:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8584 states, 8583 states have (on average 2.7711755796341606) internal successors, (23785), 8583 states have internal predecessors, (23785), 0 states have call successors, (0), 0 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 19:45:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8584 states to 8584 states and 23785 transitions. [2022-03-03 19:45:05,211 INFO L78 Accepts]: Start accepts. Automaton has 8584 states and 23785 transitions. Word has length 69 [2022-03-03 19:45:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:05,211 INFO L470 AbstractCegarLoop]: Abstraction has 8584 states and 23785 transitions. [2022-03-03 19:45:05,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.0849673202614378) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 19:45:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 8584 states and 23785 transitions. [2022-03-03 19:45:05,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-03 19:45:05,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:05,221 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:05,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:05,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-03 19:45:05,422 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:05,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1443635544, now seen corresponding path program 64 times [2022-03-03 19:45:05,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:05,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965896138] [2022-03-03 19:45:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:05,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:07,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:07,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965896138] [2022-03-03 19:45:07,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965896138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:07,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002483926] [2022-03-03 19:45:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:07,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:07,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:07,017 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:07,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:45:07,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:07,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-03 19:45:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:07,275 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 19:45:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:07,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:07,346 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:45:07,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:45:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:07,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002483926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:07,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:07,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 62 [2022-03-03 19:45:07,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968004577] [2022-03-03 19:45:07,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:07,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-03 19:45:07,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-03 19:45:07,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 19:45:07,473 INFO L87 Difference]: Start difference. First operand 8584 states and 23785 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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 19:45:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:14,545 INFO L93 Difference]: Finished difference Result 48422 states and 141583 transitions. [2022-03-03 19:45:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 19:45:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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 69 [2022-03-03 19:45:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:14,635 INFO L225 Difference]: With dead ends: 48422 [2022-03-03 19:45:14,636 INFO L226 Difference]: Without dead ends: 46784 [2022-03-03 19:45:14,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2022-03-03 19:45:14,637 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 2163 mSDsluCounter, 9800 mSDsCounter, 0 mSdLazyCounter, 8500 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2163 SdHoareTripleChecker+Valid, 4343 SdHoareTripleChecker+Invalid, 9024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 8500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:14,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2163 Valid, 4343 Invalid, 9024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 8500 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-03 19:45:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46784 states. [2022-03-03 19:45:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46784 to 5824. [2022-03-03 19:45:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5824 states, 5823 states have (on average 2.9594710630259318) internal successors, (17233), 5823 states have internal predecessors, (17233), 0 states have call successors, (0), 0 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 19:45:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5824 states to 5824 states and 17233 transitions. [2022-03-03 19:45:14,950 INFO L78 Accepts]: Start accepts. Automaton has 5824 states and 17233 transitions. Word has length 69 [2022-03-03 19:45:14,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:14,950 INFO L470 AbstractCegarLoop]: Abstraction has 5824 states and 17233 transitions. [2022-03-03 19:45:14,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 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 19:45:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 5824 states and 17233 transitions. [2022-03-03 19:45:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-03 19:45:14,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:14,958 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:14,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 19:45:15,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:15,159 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1804358531, now seen corresponding path program 65 times [2022-03-03 19:45:15,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:15,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145368390] [2022-03-03 19:45:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:15,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:15,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:15,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145368390] [2022-03-03 19:45:15,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145368390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:15,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732273872] [2022-03-03 19:45:15,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:15,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:15,622 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:15,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:45:15,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-03-03 19:45:15,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-03 19:45:15,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:15,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:15,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732273872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:15,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:15,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 33 [2022-03-03 19:45:15,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992333454] [2022-03-03 19:45:15,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:15,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:45:15,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:45:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:45:15,923 INFO L87 Difference]: Start difference. First operand 5824 states and 17233 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 19:45:16,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:16,347 INFO L93 Difference]: Finished difference Result 44892 states and 132483 transitions. [2022-03-03 19:45:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:45:16,348 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 70 [2022-03-03 19:45:16,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:16,423 INFO L225 Difference]: With dead ends: 44892 [2022-03-03 19:45:16,423 INFO L226 Difference]: Without dead ends: 44798 [2022-03-03 19:45:16,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:45:16,423 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 536 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:16,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 237 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44798 states. [2022-03-03 19:45:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44798 to 3256. [2022-03-03 19:45:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3255 states have (on average 2.3459293394777267) internal successors, (7636), 3255 states have internal predecessors, (7636), 0 states have call successors, (0), 0 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 19:45:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 7636 transitions. [2022-03-03 19:45:16,711 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 7636 transitions. Word has length 70 [2022-03-03 19:45:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:16,711 INFO L470 AbstractCegarLoop]: Abstraction has 3256 states and 7636 transitions. [2022-03-03 19:45:16,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 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 19:45:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 7636 transitions. [2022-03-03 19:45:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-03 19:45:16,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:16,714 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:16,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 19:45:16,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-03 19:45:16,914 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:16,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1809632066, now seen corresponding path program 66 times [2022-03-03 19:45:16,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:16,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728508836] [2022-03-03 19:45:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:16,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:18,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:18,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728508836] [2022-03-03 19:45:18,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728508836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:18,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085503268] [2022-03-03 19:45:18,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:18,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:18,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:18,560 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:18,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:45:18,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-03 19:45:18,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:18,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-03 19:45:18,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:18,837 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 19:45:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:18,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:18,911 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:45:18,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:45:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:19,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085503268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:19,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:19,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 64 [2022-03-03 19:45:19,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848272885] [2022-03-03 19:45:19,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:19,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-03 19:45:19,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-03 19:45:19,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 19:45:19,043 INFO L87 Difference]: Start difference. First operand 3256 states and 7636 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 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 19:45:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:26,459 INFO L93 Difference]: Finished difference Result 4999 states and 10966 transitions. [2022-03-03 19:45:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:45:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 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 71 [2022-03-03 19:45:26,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:26,464 INFO L225 Difference]: With dead ends: 4999 [2022-03-03 19:45:26,464 INFO L226 Difference]: Without dead ends: 3259 [2022-03-03 19:45:26,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 136 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2022-03-03 19:45:26,465 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 2296 mSDsluCounter, 10452 mSDsCounter, 0 mSdLazyCounter, 9062 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2296 SdHoareTripleChecker+Valid, 4627 SdHoareTripleChecker+Invalid, 9619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 9062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:26,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2296 Valid, 4627 Invalid, 9619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 9062 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-03 19:45:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2022-03-03 19:45:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 171. [2022-03-03 19:45:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.9764705882352942) internal successors, (336), 170 states have internal predecessors, (336), 0 states have call successors, (0), 0 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 19:45:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2022-03-03 19:45:26,475 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2022-03-03 19:45:26,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:26,475 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2022-03-03 19:45:26,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 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 19:45:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2022-03-03 19:45:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-03 19:45:26,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:26,475 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:26,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 19:45:26,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 19:45:26,676 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:26,676 INFO L85 PathProgramCache]: Analyzing trace with hash 287097429, now seen corresponding path program 67 times [2022-03-03 19:45:26,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:26,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859972866] [2022-03-03 19:45:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:26,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:27,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:27,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859972866] [2022-03-03 19:45:27,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859972866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:27,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257415443] [2022-03-03 19:45:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:27,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:27,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:27,130 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:27,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:45:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-03 19:45:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:27,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:27,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257415443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:27,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:27,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 34 [2022-03-03 19:45:27,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327302228] [2022-03-03 19:45:27,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:27,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:45:27,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:45:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:45:27,430 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:27,608 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2022-03-03 19:45:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:45:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-03-03 19:45:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:27,611 INFO L225 Difference]: With dead ends: 2045 [2022-03-03 19:45:27,611 INFO L226 Difference]: Without dead ends: 1980 [2022-03-03 19:45:27,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:45:27,611 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 556 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:27,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 242 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2022-03-03 19:45:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2022-03-03 19:45:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.0492445439283715) internal successors, (3662), 1787 states have internal predecessors, (3662), 0 states have call successors, (0), 0 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 19:45:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2022-03-03 19:45:27,630 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2022-03-03 19:45:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:27,630 INFO L470 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2022-03-03 19:45:27,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2022-03-03 19:45:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-03 19:45:27,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:27,632 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:27,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:27,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-03 19:45:27,854 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:27,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1899843126, now seen corresponding path program 68 times [2022-03-03 19:45:27,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:27,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511668506] [2022-03-03 19:45:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:27,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:29,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:29,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511668506] [2022-03-03 19:45:29,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511668506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:29,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109788535] [2022-03-03 19:45:29,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:29,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:29,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:29,632 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:29,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:45:29,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:29,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:29,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2022-03-03 19:45:29,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:29,888 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 19:45:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:29,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:29,965 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:45:29,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:45:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:30,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109788535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:30,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:30,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 66 [2022-03-03 19:45:30,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627509705] [2022-03-03 19:45:30,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:30,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-03 19:45:30,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-03 19:45:30,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:45:30,102 INFO L87 Difference]: Start difference. First operand 1788 states and 3662 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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 19:45:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:37,999 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2022-03-03 19:45:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:45:37,999 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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 73 [2022-03-03 19:45:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:38,002 INFO L225 Difference]: With dead ends: 3635 [2022-03-03 19:45:38,002 INFO L226 Difference]: Without dead ends: 2319 [2022-03-03 19:45:38,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2022-03-03 19:45:38,004 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2434 mSDsluCounter, 11125 mSDsCounter, 0 mSdLazyCounter, 9642 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 4920 SdHoareTripleChecker+Invalid, 10233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 9642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:38,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 4920 Invalid, 10233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 9642 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-03 19:45:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-03-03 19:45:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2022-03-03 19:45:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.977142857142857) internal successors, (346), 175 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 19:45:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2022-03-03 19:45:38,010 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2022-03-03 19:45:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:38,010 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2022-03-03 19:45:38,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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 19:45:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2022-03-03 19:45:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-03 19:45:38,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:38,011 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:38,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-03 19:45:38,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-03 19:45:38,211 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:38,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1211327007, now seen corresponding path program 69 times [2022-03-03 19:45:38,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:38,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471110941] [2022-03-03 19:45:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:38,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:38,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471110941] [2022-03-03 19:45:38,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471110941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:38,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104222762] [2022-03-03 19:45:38,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:38,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:38,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:38,762 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:38,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:45:38,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-03-03 19:45:38,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:38,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-03 19:45:38,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:38,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:39,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104222762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:39,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:39,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 35 [2022-03-03 19:45:39,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058740994] [2022-03-03 19:45:39,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:39,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-03 19:45:39,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:39,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-03 19:45:39,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:45:39,072 INFO L87 Difference]: Start difference. First operand 176 states and 346 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:39,263 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2022-03-03 19:45:39,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:45:39,263 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-03-03 19:45:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:39,266 INFO L225 Difference]: With dead ends: 2158 [2022-03-03 19:45:39,266 INFO L226 Difference]: Without dead ends: 2091 [2022-03-03 19:45:39,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:45:39,266 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 633 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:39,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 259 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2022-03-03 19:45:39,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2022-03-03 19:45:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.0480972515856237) internal successors, (3875), 1892 states have internal predecessors, (3875), 0 states have call successors, (0), 0 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 19:45:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2022-03-03 19:45:39,281 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2022-03-03 19:45:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:39,281 INFO L470 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2022-03-03 19:45:39,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2022-03-03 19:45:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-03 19:45:39,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:39,283 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:39,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 19:45:39,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:39,483 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:39,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:39,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1845906046, now seen corresponding path program 70 times [2022-03-03 19:45:39,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:39,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356071875] [2022-03-03 19:45:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:39,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:41,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356071875] [2022-03-03 19:45:41,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356071875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:41,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360502601] [2022-03-03 19:45:41,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:41,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:41,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:41,317 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:41,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:45:41,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:41,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:41,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-03 19:45:41,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:41,615 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 19:45:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:41,693 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:45:41,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:45:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360502601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:41,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:41,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 68 [2022-03-03 19:45:41,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221856640] [2022-03-03 19:45:41,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:41,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-03 19:45:41,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:41,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-03 19:45:41,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:45:41,835 INFO L87 Difference]: Start difference. First operand 1893 states and 3875 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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 19:45:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:50,278 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2022-03-03 19:45:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:45:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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 75 [2022-03-03 19:45:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:50,281 INFO L225 Difference]: With dead ends: 3847 [2022-03-03 19:45:50,281 INFO L226 Difference]: Without dead ends: 2457 [2022-03-03 19:45:50,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2022-03-03 19:45:50,282 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 2576 mSDsluCounter, 11819 mSDsCounter, 0 mSdLazyCounter, 10240 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2576 SdHoareTripleChecker+Valid, 5222 SdHoareTripleChecker+Invalid, 10866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 10240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:50,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2576 Valid, 5222 Invalid, 10866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 10240 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-03 19:45:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2022-03-03 19:45:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2022-03-03 19:45:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.9777777777777779) internal successors, (356), 180 states have internal predecessors, (356), 0 states have call successors, (0), 0 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 19:45:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2022-03-03 19:45:50,288 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2022-03-03 19:45:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:50,289 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2022-03-03 19:45:50,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 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 19:45:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2022-03-03 19:45:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-03 19:45:50,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:50,289 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:50,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-03 19:45:50,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:50,490 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1365434347, now seen corresponding path program 71 times [2022-03-03 19:45:50,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:50,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706561875] [2022-03-03 19:45:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:50,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:50,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:50,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706561875] [2022-03-03 19:45:50,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706561875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:50,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77842480] [2022-03-03 19:45:50,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:50,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:50,983 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:50,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:45:51,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-03 19:45:51,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-03 19:45:51,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:51,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:51,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77842480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:51,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:51,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 36 [2022-03-03 19:45:51,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905082833] [2022-03-03 19:45:51,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:51,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-03 19:45:51,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-03 19:45:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:45:51,307 INFO L87 Difference]: Start difference. First operand 181 states and 356 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 19:45:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:51,505 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2022-03-03 19:45:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:45:51,505 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 76 [2022-03-03 19:45:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:51,507 INFO L225 Difference]: With dead ends: 2274 [2022-03-03 19:45:51,507 INFO L226 Difference]: Without dead ends: 2205 [2022-03-03 19:45:51,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:45:51,508 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 511 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:51,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 277 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2022-03-03 19:45:51,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2022-03-03 19:45:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 2.047) internal successors, (4094), 2000 states have internal predecessors, (4094), 0 states have call successors, (0), 0 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 19:45:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2022-03-03 19:45:51,525 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2022-03-03 19:45:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:51,525 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2022-03-03 19:45:51,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 19:45:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2022-03-03 19:45:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-03 19:45:51,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:51,527 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:51,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-03 19:45:51,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:51,728 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1310534794, now seen corresponding path program 72 times [2022-03-03 19:45:51,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:51,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919022673] [2022-03-03 19:45:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:51,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:53,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:53,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919022673] [2022-03-03 19:45:53,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919022673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:53,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500041002] [2022-03-03 19:45:53,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:53,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:53,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:53,658 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:53,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:45:53,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-03 19:45:53,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:53,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 141 conjunts are in the unsatisfiable core [2022-03-03 19:45:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:53,957 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 19:45:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:53,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:54,037 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:45:54,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:45:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:54,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500041002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:54,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:54,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 70 [2022-03-03 19:45:54,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501725343] [2022-03-03 19:45:54,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:54,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-03 19:45:54,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:54,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-03 19:45:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:45:54,182 INFO L87 Difference]: Start difference. First operand 2001 states and 4094 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:03,244 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2022-03-03 19:46:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:46:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-03-03 19:46:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:03,247 INFO L225 Difference]: With dead ends: 4065 [2022-03-03 19:46:03,247 INFO L226 Difference]: Without dead ends: 2599 [2022-03-03 19:46:03,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2022-03-03 19:46:03,249 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2722 mSDsluCounter, 12534 mSDsCounter, 0 mSdLazyCounter, 10856 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2722 SdHoareTripleChecker+Valid, 5533 SdHoareTripleChecker+Invalid, 11518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 10856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:03,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2722 Valid, 5533 Invalid, 11518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 10856 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-03 19:46:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2022-03-03 19:46:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2022-03-03 19:46:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.9783783783783784) internal successors, (366), 185 states have internal predecessors, (366), 0 states have call successors, (0), 0 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 19:46:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2022-03-03 19:46:03,256 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2022-03-03 19:46:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:03,256 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2022-03-03 19:46:03,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2022-03-03 19:46:03,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-03 19:46:03,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:03,257 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:03,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-03 19:46:03,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-03 19:46:03,457 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:03,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:03,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1948794719, now seen corresponding path program 73 times [2022-03-03 19:46:03,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:03,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947029378] [2022-03-03 19:46:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:03,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:03,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:03,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947029378] [2022-03-03 19:46:03,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947029378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:03,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255046510] [2022-03-03 19:46:03,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:03,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:03,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:03,980 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:03,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:46:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-03 19:46:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255046510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:04,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:04,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 37 [2022-03-03 19:46:04,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223363324] [2022-03-03 19:46:04,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:04,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-03 19:46:04,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-03 19:46:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:46:04,332 INFO L87 Difference]: Start difference. First operand 186 states and 366 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:04,537 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2022-03-03 19:46:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:46:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-03-03 19:46:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:04,540 INFO L225 Difference]: With dead ends: 2393 [2022-03-03 19:46:04,540 INFO L226 Difference]: Without dead ends: 2322 [2022-03-03 19:46:04,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:46:04,540 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 517 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:04,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 288 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-03-03 19:46:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2022-03-03 19:46:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.045949786830886) internal successors, (4319), 2111 states have internal predecessors, (4319), 0 states have call successors, (0), 0 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 19:46:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2022-03-03 19:46:04,556 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2022-03-03 19:46:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:04,556 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2022-03-03 19:46:04,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2022-03-03 19:46:04,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-03 19:46:04,558 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:04,558 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:04,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:04,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:04,758 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:04,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:04,759 INFO L85 PathProgramCache]: Analyzing trace with hash -729931838, now seen corresponding path program 74 times [2022-03-03 19:46:04,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:04,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754280199] [2022-03-03 19:46:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:04,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:06,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:06,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754280199] [2022-03-03 19:46:06,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754280199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:06,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744119409] [2022-03-03 19:46:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:06,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:06,799 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:06,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:46:06,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:06,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2022-03-03 19:46:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:07,076 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 19:46:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:07,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:07,160 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:46:07,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:46:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:07,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744119409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:07,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:07,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 72 [2022-03-03 19:46:07,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895236913] [2022-03-03 19:46:07,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:07,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-03 19:46:07,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-03 19:46:07,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:46:07,312 INFO L87 Difference]: Start difference. First operand 2112 states and 4319 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 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 19:46:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:16,961 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2022-03-03 19:46:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 19:46:16,961 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 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 79 [2022-03-03 19:46:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:16,965 INFO L225 Difference]: With dead ends: 4289 [2022-03-03 19:46:16,965 INFO L226 Difference]: Without dead ends: 2745 [2022-03-03 19:46:16,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2022-03-03 19:46:16,965 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 2872 mSDsluCounter, 13270 mSDsCounter, 0 mSdLazyCounter, 11490 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2872 SdHoareTripleChecker+Valid, 5853 SdHoareTripleChecker+Invalid, 12189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 11490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:16,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2872 Valid, 5853 Invalid, 12189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 11490 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-03 19:46:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-03-03 19:46:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2022-03-03 19:46:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9789473684210526) internal successors, (376), 190 states have internal predecessors, (376), 0 states have call successors, (0), 0 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 19:46:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2022-03-03 19:46:16,973 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2022-03-03 19:46:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:16,973 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2022-03-03 19:46:16,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 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 19:46:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2022-03-03 19:46:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-03 19:46:16,973 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:16,974 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:16,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 19:46:17,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:17,174 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1129972267, now seen corresponding path program 75 times [2022-03-03 19:46:17,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:17,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566732172] [2022-03-03 19:46:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:17,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:17,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:17,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566732172] [2022-03-03 19:46:17,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566732172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:17,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227832230] [2022-03-03 19:46:17,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:17,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:17,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:17,717 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:17,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:46:17,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-03 19:46:17,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-03 19:46:17,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:17,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:18,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227832230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:18,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:18,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 38 [2022-03-03 19:46:18,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367598825] [2022-03-03 19:46:18,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:18,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-03 19:46:18,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-03 19:46:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:46:18,051 INFO L87 Difference]: Start difference. First operand 191 states and 376 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:18,256 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2022-03-03 19:46:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:46:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-03-03 19:46:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:18,258 INFO L225 Difference]: With dead ends: 2515 [2022-03-03 19:46:18,258 INFO L226 Difference]: Without dead ends: 2442 [2022-03-03 19:46:18,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:46:18,258 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 573 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:18,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 277 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2022-03-03 19:46:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2022-03-03 19:46:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.044943820224719) internal successors, (4550), 2225 states have internal predecessors, (4550), 0 states have call successors, (0), 0 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 19:46:18,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2022-03-03 19:46:18,275 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2022-03-03 19:46:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:18,275 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2022-03-03 19:46:18,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2022-03-03 19:46:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-03 19:46:18,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:18,277 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:18,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 19:46:18,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-03 19:46:18,478 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1966151862, now seen corresponding path program 76 times [2022-03-03 19:46:18,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:18,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422963742] [2022-03-03 19:46:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:20,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:20,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422963742] [2022-03-03 19:46:20,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422963742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:20,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992384001] [2022-03-03 19:46:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:20,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:20,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:20,607 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:20,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:46:20,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:20,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:20,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2022-03-03 19:46:20,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:20,899 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 19:46:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:20,985 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:46:20,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-03-03 19:46:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:21,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992384001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:21,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:21,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 74 [2022-03-03 19:46:21,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922961916] [2022-03-03 19:46:21,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:21,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-03 19:46:21,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-03 19:46:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:46:21,138 INFO L87 Difference]: Start difference. First operand 2226 states and 4550 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:31,405 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2022-03-03 19:46:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:46:31,406 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-03-03 19:46:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:31,409 INFO L225 Difference]: With dead ends: 4519 [2022-03-03 19:46:31,409 INFO L226 Difference]: Without dead ends: 2895 [2022-03-03 19:46:31,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2022-03-03 19:46:31,411 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 3026 mSDsluCounter, 14027 mSDsCounter, 0 mSdLazyCounter, 12142 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3026 SdHoareTripleChecker+Valid, 6182 SdHoareTripleChecker+Invalid, 12879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 12142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:31,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3026 Valid, 6182 Invalid, 12879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 12142 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-03 19:46:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-03-03 19:46:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2022-03-03 19:46:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 195 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 19:46:31,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2022-03-03 19:46:31,419 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2022-03-03 19:46:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:31,419 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2022-03-03 19:46:31,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2022-03-03 19:46:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-03 19:46:31,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:31,420 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:31,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-03 19:46:31,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-03 19:46:31,620 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash 844243809, now seen corresponding path program 77 times [2022-03-03 19:46:31,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:31,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174140138] [2022-03-03 19:46:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:31,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:32,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:32,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174140138] [2022-03-03 19:46:32,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174140138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:32,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781722581] [2022-03-03 19:46:32,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:32,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:32,187 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:32,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:46:32,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-03 19:46:32,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:32,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-03 19:46:32,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:32,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:32,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781722581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:32,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:32,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 39 [2022-03-03 19:46:32,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961306711] [2022-03-03 19:46:32,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:32,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:46:32,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:46:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:46:32,537 INFO L87 Difference]: Start difference. First operand 196 states and 386 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 19:46:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:32,763 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2022-03-03 19:46:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:46:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 82 [2022-03-03 19:46:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:32,767 INFO L225 Difference]: With dead ends: 2640 [2022-03-03 19:46:32,767 INFO L226 Difference]: Without dead ends: 2565 [2022-03-03 19:46:32,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:46:32,767 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 765 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:32,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 283 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:46:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2022-03-03 19:46:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2022-03-03 19:46:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.04397950469684) internal successors, (4787), 2342 states have internal predecessors, (4787), 0 states have call successors, (0), 0 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 19:46:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2022-03-03 19:46:32,786 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2022-03-03 19:46:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:32,786 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2022-03-03 19:46:32,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 19:46:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2022-03-03 19:46:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-03 19:46:32,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:32,787 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:32,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-03 19:46:32,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:32,988 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:32,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash -192804350, now seen corresponding path program 78 times [2022-03-03 19:46:32,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:32,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753110174] [2022-03-03 19:46:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:35,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:35,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753110174] [2022-03-03 19:46:35,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753110174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:35,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306378768] [2022-03-03 19:46:35,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:35,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:35,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:35,260 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:35,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:46:35,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-03-03 19:46:35,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-03 19:46:35,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:41,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:41,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:46:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 666 proven. 740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:41,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:47,434 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:46:47,435 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 12 treesize of output 11 [2022-03-03 19:46:47,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 630 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:47,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306378768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:47,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:47,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 187 [2022-03-03 19:46:47,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460531579] [2022-03-03 19:46:47,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:47,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-03-03 19:46:47,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:47,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-03-03 19:46:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5814, Invalid=29342, Unknown=0, NotChecked=0, Total=35156 [2022-03-03 19:46:47,502 INFO L87 Difference]: Start difference. First operand 2343 states and 4787 transitions. Second operand has 188 states, 188 states have (on average 1.0691489361702127) internal successors, (201), 187 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-03 19:50:25,259 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:50:25,259 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 19:50:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 717 states. [2022-03-03 19:50:25,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1604 GetRequests, 656 SyntacticMatches, 83 SemanticMatches, 864 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 201680 ImplicationChecksByTransitivity, 132.7s TimeCoverageRelationStatistics Valid=195029, Invalid=554061, Unknown=0, NotChecked=0, Total=749090 [2022-03-03 19:50:25,412 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2708 mSDsluCounter, 7012 mSDsCounter, 0 mSdLazyCounter, 4155 mSolverCounterSat, 890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2708 SdHoareTripleChecker+Valid, 5448 SdHoareTripleChecker+Invalid, 19421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 4155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14376 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:25,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2708 Valid, 5448 Invalid, 19421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [890 Valid, 4155 Invalid, 0 Unknown, 14376 Unchecked, 1.6s Time] [2022-03-03 19:50:25,413 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 19:50:25,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:25,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:25,627 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (2343states) and FLOYD_HOARE automaton (currently 717 states, 188 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 866 known predicates. [2022-03-03 19:50:25,629 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 19:50:25,629 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 19:50:25,631 INFO L732 BasicCegarLoop]: Path program histogram: [78, 1, 1] [2022-03-03 19:50:25,633 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 19:50:25,633 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 19:50:25,634 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 07:50:25 BasicIcfg [2022-03-03 19:50:25,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 19:50:25,634 INFO L158 Benchmark]: Toolchain (without parser) took 777756.49ms. Allocated memory was 188.7MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 148.3MB in the beginning and 611.4MB in the end (delta: -463.1MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-03-03 19:50:25,635 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 188.7MB. Free memory is still 149.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:50:25,635 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.40ms. Allocated memory is still 188.7MB. Free memory was 148.2MB in the beginning and 146.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-03 19:50:25,635 INFO L158 Benchmark]: Boogie Preprocessor took 14.73ms. Allocated memory is still 188.7MB. Free memory was 146.7MB in the beginning and 145.8MB in the end (delta: 924.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:50:25,635 INFO L158 Benchmark]: RCFGBuilder took 216.29ms. Allocated memory is still 188.7MB. Free memory was 145.8MB in the beginning and 136.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-03 19:50:25,635 INFO L158 Benchmark]: TraceAbstraction took 777498.28ms. Allocated memory was 188.7MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 136.5MB in the beginning and 611.4MB in the end (delta: -475.0MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-03-03 19:50:25,636 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 0.13ms. Allocated memory is still 188.7MB. Free memory is still 149.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.40ms. Allocated memory is still 188.7MB. Free memory was 148.2MB in the beginning and 146.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.73ms. Allocated memory is still 188.7MB. Free memory was 146.7MB in the beginning and 145.8MB in the end (delta: 924.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 216.29ms. Allocated memory is still 188.7MB. Free memory was 145.8MB in the beginning and 136.9MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 777498.28ms. Allocated memory was 188.7MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 136.5MB in the beginning and 611.4MB in the end (delta: -475.0MB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (2343states) and FLOYD_HOARE automaton (currently 717 states, 188 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 866 known predicates. - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2343states) and FLOYD_HOARE automaton (currently 717 states, 188 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 866 known predicates. - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2343states) and FLOYD_HOARE automaton (currently 717 states, 188 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 1quantifier alternations) to 866 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 777.4s, OverallIterations: 80, TraceHistogramMax: 37, PathProgramHistogramMax: 78, EmptinessCheckTime: 0.1s, AutomataDifference: 652.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68609 SdHoareTripleChecker+Valid, 60.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68609 mSDsluCounter, 103671 SdHoareTripleChecker+Invalid, 50.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 28732 IncrementalHoareTripleChecker+Unchecked, 209260 mSDsCounter, 12872 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 172384 IncrementalHoareTripleChecker+Invalid, 213988 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12872 mSolverCounterUnsat, 3538 mSDtfsCounter, 172384 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16459 GetRequests, 9466 SyntacticMatches, 463 SemanticMatches, 6529 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 583436 ImplicationChecksByTransitivity, 436.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8584occurred in iteration=65, InterpolantAutomatonStates: 4031, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 79 MinimizatonAttempts, 365529 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 100.6s InterpolantComputationTime, 7395 NumberOfCodeBlocks, 7395 NumberOfCodeBlocksAsserted, 571 NumberOfCheckSat, 10847 ConstructedInterpolants, 304 QuantifiedInterpolants, 70814 SizeOfPredicates, 93 NumberOfNonLiveVariables, 15171 ConjunctsInSsa, 4504 ConjunctsInUnsatCore, 236 InterpolantComputations, 2 PerfectInterpolantSequences, 31224/116035 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