/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/two-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.abstract-por-f0ea240 [2022-02-11 01:07:40,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-11 01:07:40,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-11 01:07:41,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-11 01:07:41,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-11 01:07:41,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-11 01:07:41,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-11 01:07:41,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-02-11 01:07:41,105 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-11 01:07:41,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-11 01:07:41,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-11 01:07:41,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-11 01:07:41,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-11 01:07:41,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-11 01:07:41,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-11 01:07:41,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-11 01:07:41,107 INFO L138 SettingsManager]: * Use SBE=true [2022-02-11 01:07:41,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-11 01:07:41,108 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-11 01:07:41,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-11 01:07:41,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-11 01:07:41,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-11 01:07:41,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-11 01:07:41,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-11 01:07:41,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-11 01:07:41,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:07:41,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-11 01:07:41,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-11 01:07:41,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-11 01:07:41,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-11 01:07:41,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-11 01:07:41,111 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-11 01:07:41,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-11 01:07:41,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-11 01:07:41,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-11 01:07:41,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-11 01:07:41,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-11 01:07:41,396 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-11 01:07:41,397 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-11 01:07:41,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl [2022-02-11 01:07:41,399 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl' [2022-02-11 01:07:41,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-11 01:07:41,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-11 01:07:41,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-11 01:07:41,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-11 01:07:41,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-11 01:07:41,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,445 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-11 01:07:41,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-11 01:07:41,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-11 01:07:41,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-11 01:07:41,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-11 01:07:41,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-11 01:07:41,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-11 01:07:41,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-11 01:07:41,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-11 01:07:41,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/1) ... [2022-02-11 01:07:41,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-11 01:07:41,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:41,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-11 01:07:41,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-11 01:07:41,539 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-11 01:07:41,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-11 01:07:41,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-11 01:07:41,539 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-11 01:07:41,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-11 01:07:41,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-11 01:07:41,540 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-11 01:07:41,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-11 01:07:41,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-11 01:07:41,541 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-11 01:07:41,582 INFO L234 CfgBuilder]: Building ICFG [2022-02-11 01:07:41,583 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-11 01:07:41,721 INFO L275 CfgBuilder]: Performing block encoding [2022-02-11 01:07:41,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-11 01:07:41,736 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-11 01:07:41,738 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:07:41 BoogieIcfgContainer [2022-02-11 01:07:41,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-11 01:07:41,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-11 01:07:41,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-11 01:07:41,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-11 01:07:41,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.02 01:07:41" (1/2) ... [2022-02-11 01:07:41,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5107ac6e and model type two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.02 01:07:41, skipping insertion in model container [2022-02-11 01:07:41,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.02 01:07:41" (2/2) ... [2022-02-11 01:07:41,762 INFO L112 eAbstractionObserver]: Analyzing ICFG two-queue.wvr.bpl [2022-02-11 01:07:41,767 WARN L154 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-11 01:07:41,767 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-11 01:07:41,767 INFO L168 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-11 01:07:41,767 INFO L538 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-11 01:07:41,817 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-11 01:07:41,851 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-11 01:07:41,856 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-11 01:07:41,856 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-11 01:07:41,863 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2022-02-11 01:07:41,904 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:41,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-11 01:07:41,942 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:41,943 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:41,943 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1388939217, now seen corresponding path program 1 times [2022-02-11 01:07:41,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:41,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101471197] [2022-02-11 01:07:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:41,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:42,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:42,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101471197] [2022-02-11 01:07:42,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101471197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:07:42,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:07:42,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-11 01:07:42,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600688196] [2022-02-11 01:07:42,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:07:42,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:07:42,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:42,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:07:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:07:42,165 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2022-02-11 01:07:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:42,225 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2022-02-11 01:07:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:07:42,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 [2022-02-11 01:07:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:42,235 INFO L225 Difference]: With dead ends: 89 [2022-02-11 01:07:42,235 INFO L226 Difference]: Without dead ends: 82 [2022-02-11 01:07:42,236 INFO L933 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 [2022-02-11 01:07:42,239 INFO L934 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:42,240 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:07:42,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-11 01:07:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2022-02-11 01:07:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2022-02-11 01:07:42,279 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 11 [2022-02-11 01:07:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:42,279 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2022-02-11 01:07:42,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2022-02-11 01:07:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2022-02-11 01:07:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 01:07:42,296 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:42,297 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:42,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-11 01:07:42,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 736893362, now seen corresponding path program 1 times [2022-02-11 01:07:42,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:42,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679524217] [2022-02-11 01:07:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:42,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:42,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679524217] [2022-02-11 01:07:42,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679524217] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:07:42,334 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:07:42,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-11 01:07:42,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087988867] [2022-02-11 01:07:42,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:07:42,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:07:42,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:07:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:07:42,338 INFO L87 Difference]: Start difference. First operand 62 states and 119 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2022-02-11 01:07:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:42,369 INFO L93 Difference]: Finished difference Result 76 states and 142 transitions. [2022-02-11 01:07:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:07:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 [2022-02-11 01:07:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:42,371 INFO L225 Difference]: With dead ends: 76 [2022-02-11 01:07:42,371 INFO L226 Difference]: Without dead ends: 65 [2022-02-11 01:07:42,371 INFO L933 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 [2022-02-11 01:07:42,373 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:42,373 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:07:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-11 01:07:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-02-11 01:07:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.935483870967742) internal successors, (120), 62 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 120 transitions. [2022-02-11 01:07:42,382 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 120 transitions. Word has length 15 [2022-02-11 01:07:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:42,383 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 120 transitions. [2022-02-11 01:07:42,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2022-02-11 01:07:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 120 transitions. [2022-02-11 01:07:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-11 01:07:42,388 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:42,388 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:42,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-11 01:07:42,389 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:42,391 INFO L85 PathProgramCache]: Analyzing trace with hash -67130382, now seen corresponding path program 1 times [2022-02-11 01:07:42,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:42,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746470174] [2022-02-11 01:07:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:42,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:42,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746470174] [2022-02-11 01:07:42,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746470174] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:07:42,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-11 01:07:42,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-11 01:07:42,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686487495] [2022-02-11 01:07:42,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:07:42,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-11 01:07:42,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-11 01:07:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-11 01:07:42,460 INFO L87 Difference]: Start difference. First operand 63 states and 120 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2022-02-11 01:07:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:42,483 INFO L93 Difference]: Finished difference Result 64 states and 116 transitions. [2022-02-11 01:07:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-11 01:07:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 [2022-02-11 01:07:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:42,484 INFO L225 Difference]: With dead ends: 64 [2022-02-11 01:07:42,484 INFO L226 Difference]: Without dead ends: 58 [2022-02-11 01:07:42,485 INFO L933 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 [2022-02-11 01:07:42,486 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:42,487 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:07:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-11 01:07:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-02-11 01:07:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.8596491228070176) internal successors, (106), 57 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 106 transitions. [2022-02-11 01:07:42,493 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 106 transitions. Word has length 15 [2022-02-11 01:07:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:42,494 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 106 transitions. [2022-02-11 01:07:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2022-02-11 01:07:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 106 transitions. [2022-02-11 01:07:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:42,495 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:42,495 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:42,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-11 01:07:42,495 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash 684246005, now seen corresponding path program 1 times [2022-02-11 01:07:42,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:42,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206326727] [2022-02-11 01:07:42,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:42,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:42,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:42,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206326727] [2022-02-11 01:07:42,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206326727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:42,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065641939] [2022-02-11 01:07:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:42,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:42,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:42,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-11 01:07:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 01:07:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:42,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:07:43,078 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 18 treesize of output 12 [2022-02-11 01:07:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:43,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:43,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:43,487 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 36 treesize of output 38 [2022-02-11 01:07:43,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:43,604 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 43 treesize of output 41 [2022-02-11 01:07:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:43,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065641939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:43,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:43,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 01:07:43,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165973963] [2022-02-11 01:07:43,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:43,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:07:43,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:07:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:07:43,788 INFO L87 Difference]: Start difference. First operand 58 states and 106 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:44,565 INFO L93 Difference]: Finished difference Result 161 states and 298 transitions. [2022-02-11 01:07:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:07:44,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:44,567 INFO L225 Difference]: With dead ends: 161 [2022-02-11 01:07:44,567 INFO L226 Difference]: Without dead ends: 154 [2022-02-11 01:07:44,567 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 01:07:44,568 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 168 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:44,569 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 149 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:07:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-11 01:07:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 85. [2022-02-11 01:07:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 84 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) [2022-02-11 01:07:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 161 transitions. [2022-02-11 01:07:44,578 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 161 transitions. Word has length 19 [2022-02-11 01:07:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:44,578 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 161 transitions. [2022-02-11 01:07:44,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 161 transitions. [2022-02-11 01:07:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:44,580 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:44,580 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:44,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:44,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:44,796 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:44,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:44,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1947264813, now seen corresponding path program 2 times [2022-02-11 01:07:44,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:44,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326335019] [2022-02-11 01:07:44,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:44,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:44,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:44,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326335019] [2022-02-11 01:07:44,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326335019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:44,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731417490] [2022-02-11 01:07:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:07:44,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:44,971 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:44,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-11 01:07:45,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:07:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:07:45,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:45,123 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 18 treesize of output 12 [2022-02-11 01:07:45,149 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 [2022-02-11 01:07:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:45,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:45,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:45,505 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 36 treesize of output 36 [2022-02-11 01:07:45,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:45,609 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 33 treesize of output 35 [2022-02-11 01:07:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:45,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731417490] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:45,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:45,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-11 01:07:45,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567705208] [2022-02-11 01:07:45,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:45,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:07:45,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:45,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:07:45,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:07:45,747 INFO L87 Difference]: Start difference. First operand 85 states and 161 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:46,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:46,296 INFO L93 Difference]: Finished difference Result 171 states and 318 transitions. [2022-02-11 01:07:46,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:07:46,297 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:46,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:46,298 INFO L225 Difference]: With dead ends: 171 [2022-02-11 01:07:46,298 INFO L226 Difference]: Without dead ends: 164 [2022-02-11 01:07:46,299 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 01:07:46,299 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:46,300 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 133 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:07:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-11 01:07:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 97. [2022-02-11 01:07:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.9583333333333333) internal successors, (188), 96 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 188 transitions. [2022-02-11 01:07:46,307 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 188 transitions. Word has length 19 [2022-02-11 01:07:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:46,308 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 188 transitions. [2022-02-11 01:07:46,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 188 transitions. [2022-02-11 01:07:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:46,309 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:46,309 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:46,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:46,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:46,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash -56706093, now seen corresponding path program 3 times [2022-02-11 01:07:46,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:46,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830941761] [2022-02-11 01:07:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:46,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:46,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:46,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830941761] [2022-02-11 01:07:46,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830941761] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:46,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855737167] [2022-02-11 01:07:46,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:07:46,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:46,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:46,670 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:46,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-11 01:07:46,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:07:46,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:46,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:07:46,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:46,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:07:46,790 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 18 treesize of output 12 [2022-02-11 01:07:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:46,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:47,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:47,053 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 40 treesize of output 40 [2022-02-11 01:07:47,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:47,136 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 37 treesize of output 39 [2022-02-11 01:07:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:47,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855737167] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:47,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:47,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-11 01:07:47,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485100238] [2022-02-11 01:07:47,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:47,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:07:47,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:07:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:07:47,255 INFO L87 Difference]: Start difference. First operand 97 states and 188 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:47,658 INFO L93 Difference]: Finished difference Result 191 states and 371 transitions. [2022-02-11 01:07:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:07:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:47,660 INFO L225 Difference]: With dead ends: 191 [2022-02-11 01:07:47,660 INFO L226 Difference]: Without dead ends: 177 [2022-02-11 01:07:47,660 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:07:47,661 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:47,661 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 97 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:07:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-11 01:07:47,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 108. [2022-02-11 01:07:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0186915887850465) internal successors, (216), 107 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) [2022-02-11 01:07:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 216 transitions. [2022-02-11 01:07:47,669 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 216 transitions. Word has length 19 [2022-02-11 01:07:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:47,669 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 216 transitions. [2022-02-11 01:07:47,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 216 transitions. [2022-02-11 01:07:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:47,670 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:47,670 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:47,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-11 01:07:47,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:47,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1019005063, now seen corresponding path program 4 times [2022-02-11 01:07:47,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:47,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033903123] [2022-02-11 01:07:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:47,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:48,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:48,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033903123] [2022-02-11 01:07:48,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033903123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:48,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891620651] [2022-02-11 01:07:48,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:07:48,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:48,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:48,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:48,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-11 01:07:48,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:07:48,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:48,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:07:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:48,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:07:48,189 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 16 treesize of output 10 [2022-02-11 01:07:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:48,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:48,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:48,494 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 36 treesize of output 36 [2022-02-11 01:07:48,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:48,580 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 33 treesize of output 35 [2022-02-11 01:07:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:48,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891620651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:48,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:48,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-11 01:07:48,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118950048] [2022-02-11 01:07:48,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:48,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:07:48,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:07:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:07:48,714 INFO L87 Difference]: Start difference. First operand 108 states and 216 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:49,232 INFO L93 Difference]: Finished difference Result 185 states and 353 transitions. [2022-02-11 01:07:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:07:49,232 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:49,233 INFO L225 Difference]: With dead ends: 185 [2022-02-11 01:07:49,234 INFO L226 Difference]: Without dead ends: 178 [2022-02-11 01:07:49,234 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 01:07:49,235 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 112 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:49,235 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 138 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:07:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-11 01:07:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 108. [2022-02-11 01:07:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0186915887850465) internal successors, (216), 107 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) [2022-02-11 01:07:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 216 transitions. [2022-02-11 01:07:49,241 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 216 transitions. Word has length 19 [2022-02-11 01:07:49,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:49,241 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 216 transitions. [2022-02-11 01:07:49,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 216 transitions. [2022-02-11 01:07:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:49,242 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:49,242 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:49,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-11 01:07:49,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:49,455 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1594125323, now seen corresponding path program 5 times [2022-02-11 01:07:49,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:49,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004195019] [2022-02-11 01:07:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:49,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:49,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:49,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004195019] [2022-02-11 01:07:49,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004195019] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:49,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590748153] [2022-02-11 01:07:49,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:07:49,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:49,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:49,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-11 01:07:49,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:07:49,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:49,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 01:07:49,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:49,716 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 [2022-02-11 01:07:49,756 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 [2022-02-11 01:07:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:49,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:50,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:50,104 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 36 treesize of output 38 [2022-02-11 01:07:50,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:50,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:07:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:50,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590748153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:50,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:50,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-02-11 01:07:50,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670319103] [2022-02-11 01:07:50,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:50,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:07:50,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:07:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:07:50,301 INFO L87 Difference]: Start difference. First operand 108 states and 216 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:51,436 INFO L93 Difference]: Finished difference Result 289 states and 557 transitions. [2022-02-11 01:07:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 01:07:51,436 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:51,438 INFO L225 Difference]: With dead ends: 289 [2022-02-11 01:07:51,438 INFO L226 Difference]: Without dead ends: 272 [2022-02-11 01:07:51,439 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 01:07:51,440 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 163 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:51,440 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 161 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:07:51,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-11 01:07:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 119. [2022-02-11 01:07:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0677966101694913) internal successors, (244), 118 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 244 transitions. [2022-02-11 01:07:51,446 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 244 transitions. Word has length 19 [2022-02-11 01:07:51,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:51,446 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 244 transitions. [2022-02-11 01:07:51,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 244 transitions. [2022-02-11 01:07:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:51,447 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:51,448 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:51,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:51,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:51,656 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1262801871, now seen corresponding path program 6 times [2022-02-11 01:07:51,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:51,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622807849] [2022-02-11 01:07:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:51,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:51,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:51,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622807849] [2022-02-11 01:07:51,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622807849] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:51,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403651913] [2022-02-11 01:07:51,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:07:51,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:51,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:51,786 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:51,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-11 01:07:51,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:07:51,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:07:51,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:51,869 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 20 treesize of output 14 [2022-02-11 01:07:51,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:07:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:51,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:52,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:52,147 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 40 treesize of output 42 [2022-02-11 01:07:52,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:52,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-02-11 01:07:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:52,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403651913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:52,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:52,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-11 01:07:52,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976065312] [2022-02-11 01:07:52,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:52,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:07:52,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:52,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:07:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:07:52,355 INFO L87 Difference]: Start difference. First operand 119 states and 244 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:52,866 INFO L93 Difference]: Finished difference Result 226 states and 456 transitions. [2022-02-11 01:07:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-11 01:07:52,866 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:52,867 INFO L225 Difference]: With dead ends: 226 [2022-02-11 01:07:52,867 INFO L226 Difference]: Without dead ends: 212 [2022-02-11 01:07:52,868 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:07:52,868 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:52,869 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 107 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:07:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-11 01:07:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 124. [2022-02-11 01:07:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.0813008130081303) internal successors, (256), 123 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 256 transitions. [2022-02-11 01:07:52,874 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 256 transitions. Word has length 19 [2022-02-11 01:07:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:52,874 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 256 transitions. [2022-02-11 01:07:52,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 256 transitions. [2022-02-11 01:07:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:52,875 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:52,875 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:52,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-11 01:07:53,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:53,084 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:53,084 INFO L85 PathProgramCache]: Analyzing trace with hash -675056549, now seen corresponding path program 7 times [2022-02-11 01:07:53,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:53,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794289892] [2022-02-11 01:07:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:53,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:53,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:53,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794289892] [2022-02-11 01:07:53,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794289892] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:53,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817449603] [2022-02-11 01:07:53,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:07:53,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:53,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:53,198 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:53,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-11 01:07:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-11 01:07:53,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:53,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:07:53,348 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 16 treesize of output 10 [2022-02-11 01:07:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:53,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:53,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:53,600 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 36 treesize of output 36 [2022-02-11 01:07:53,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:53,690 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 33 treesize of output 35 [2022-02-11 01:07:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:53,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817449603] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:53,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:53,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-02-11 01:07:53,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948531685] [2022-02-11 01:07:53,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:53,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-11 01:07:53,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-11 01:07:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-11 01:07:53,831 INFO L87 Difference]: Start difference. First operand 124 states and 256 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:54,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:54,309 INFO L93 Difference]: Finished difference Result 226 states and 446 transitions. [2022-02-11 01:07:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:07:54,309 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:54,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:54,310 INFO L225 Difference]: With dead ends: 226 [2022-02-11 01:07:54,310 INFO L226 Difference]: Without dead ends: 219 [2022-02-11 01:07:54,311 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:07:54,311 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 122 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:54,312 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 160 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:07:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-11 01:07:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 127. [2022-02-11 01:07:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0793650793650795) internal successors, (262), 126 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 262 transitions. [2022-02-11 01:07:54,318 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 262 transitions. Word has length 19 [2022-02-11 01:07:54,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:54,319 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 262 transitions. [2022-02-11 01:07:54,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 262 transitions. [2022-02-11 01:07:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:54,321 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:54,321 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:54,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:54,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:54,532 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 400654607, now seen corresponding path program 8 times [2022-02-11 01:07:54,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:54,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165134065] [2022-02-11 01:07:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:54,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:54,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:54,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165134065] [2022-02-11 01:07:54,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165134065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:54,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615188354] [2022-02-11 01:07:54,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:07:54,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:54,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:54,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:54,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-11 01:07:54,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:07:54,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:07:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:54,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-02-11 01:07:54,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 01:07:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:54,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:55,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:55,086 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 36 treesize of output 38 [2022-02-11 01:07:55,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:55,153 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 43 treesize of output 41 [2022-02-11 01:07:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:55,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615188354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:55,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:55,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-11 01:07:55,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563117397] [2022-02-11 01:07:55,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:55,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:07:55,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:07:55,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:07:55,284 INFO L87 Difference]: Start difference. First operand 127 states and 262 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:55,786 INFO L93 Difference]: Finished difference Result 218 states and 429 transitions. [2022-02-11 01:07:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:07:55,786 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:55,787 INFO L225 Difference]: With dead ends: 218 [2022-02-11 01:07:55,788 INFO L226 Difference]: Without dead ends: 211 [2022-02-11 01:07:55,788 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 01:07:55,789 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:55,789 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 169 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:07:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-11 01:07:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 126. [2022-02-11 01:07:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.08) internal successors, (260), 125 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 260 transitions. [2022-02-11 01:07:55,793 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 260 transitions. Word has length 19 [2022-02-11 01:07:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:55,793 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 260 transitions. [2022-02-11 01:07:55,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:55,793 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 260 transitions. [2022-02-11 01:07:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:55,794 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:55,794 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:55,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:56,007 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,SelfDestructingSolverStorable10 [2022-02-11 01:07:56,008 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2003753969, now seen corresponding path program 9 times [2022-02-11 01:07:56,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:56,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736109792] [2022-02-11 01:07:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:56,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:56,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736109792] [2022-02-11 01:07:56,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736109792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:56,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342873568] [2022-02-11 01:07:56,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:07:56,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:56,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:56,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:56,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-11 01:07:56,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-11 01:07:56,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:07:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:56,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:07:56,228 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 18 treesize of output 12 [2022-02-11 01:07:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:56,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:56,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:56,442 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 40 treesize of output 42 [2022-02-11 01:07:56,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:56,497 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 40 treesize of output 40 [2022-02-11 01:07:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:56,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342873568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:56,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:56,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-11 01:07:56,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814613061] [2022-02-11 01:07:56,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:56,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-11 01:07:56,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-11 01:07:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-11 01:07:56,631 INFO L87 Difference]: Start difference. First operand 126 states and 260 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:57,035 INFO L93 Difference]: Finished difference Result 225 states and 453 transitions. [2022-02-11 01:07:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-11 01:07:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:57,037 INFO L225 Difference]: With dead ends: 225 [2022-02-11 01:07:57,037 INFO L226 Difference]: Without dead ends: 211 [2022-02-11 01:07:57,037 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:07:57,037 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:57,038 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 116 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-11 01:07:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-11 01:07:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 128. [2022-02-11 01:07:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.078740157480315) internal successors, (264), 127 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 264 transitions. [2022-02-11 01:07:57,042 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 264 transitions. Word has length 19 [2022-02-11 01:07:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:57,042 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 264 transitions. [2022-02-11 01:07:57,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 264 transitions. [2022-02-11 01:07:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:57,043 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:57,043 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:57,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:57,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:57,251 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:57,252 INFO L85 PathProgramCache]: Analyzing trace with hash -928042813, now seen corresponding path program 10 times [2022-02-11 01:07:57,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:57,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440935725] [2022-02-11 01:07:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:57,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:57,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:57,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440935725] [2022-02-11 01:07:57,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440935725] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:57,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380245869] [2022-02-11 01:07:57,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:07:57,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:57,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:57,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:57,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-11 01:07:57,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:07:57,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:57,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-11 01:07:57,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:57,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:07:57,506 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 16 treesize of output 10 [2022-02-11 01:07:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:57,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:57,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:57,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:07:57,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:57,829 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 43 treesize of output 41 [2022-02-11 01:07:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:57,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380245869] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:57,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:57,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-02-11 01:07:57,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14006936] [2022-02-11 01:07:57,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:57,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-11 01:07:57,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-11 01:07:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-11 01:07:57,976 INFO L87 Difference]: Start difference. First operand 128 states and 264 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:07:58,474 INFO L93 Difference]: Finished difference Result 218 states and 429 transitions. [2022-02-11 01:07:58,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-11 01:07:58,474 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:07:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:07:58,475 INFO L225 Difference]: With dead ends: 218 [2022-02-11 01:07:58,475 INFO L226 Difference]: Without dead ends: 211 [2022-02-11 01:07:58,476 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 01:07:58,476 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:07:58,476 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 154 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:07:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-02-11 01:07:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 127. [2022-02-11 01:07:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0793650793650795) internal successors, (262), 126 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 262 transitions. [2022-02-11 01:07:58,480 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 262 transitions. Word has length 19 [2022-02-11 01:07:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:07:58,481 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 262 transitions. [2022-02-11 01:07:58,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:07:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 262 transitions. [2022-02-11 01:07:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-11 01:07:58,481 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:07:58,481 INFO L515 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:07:58,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-11 01:07:58,704 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,SelfDestructingSolverStorable12 [2022-02-11 01:07:58,704 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:07:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:07:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash 753794097, now seen corresponding path program 11 times [2022-02-11 01:07:58,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:07:58,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136773162] [2022-02-11 01:07:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:07:58,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:07:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:07:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:58,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:07:58,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136773162] [2022-02-11 01:07:58,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136773162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:07:58,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917198680] [2022-02-11 01:07:58,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:07:58,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:07:58,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:07:58,826 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:07:58,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-11 01:07:58,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:07:58,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:07:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-11 01:07:58,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:07:58,954 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 [2022-02-11 01:07:59,001 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 [2022-02-11 01:07:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:59,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:07:59,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:59,317 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 36 treesize of output 38 [2022-02-11 01:07:59,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:07:59,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-11 01:07:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:07:59,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917198680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:07:59,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:07:59,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-02-11 01:07:59,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079679722] [2022-02-11 01:07:59,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:07:59,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:07:59,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:07:59,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:07:59,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:07:59,539 INFO L87 Difference]: Start difference. First operand 127 states and 262 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:00,606 INFO L93 Difference]: Finished difference Result 314 states and 615 transitions. [2022-02-11 01:08:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 01:08:00,606 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-11 01:08:00,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:00,607 INFO L225 Difference]: With dead ends: 314 [2022-02-11 01:08:00,608 INFO L226 Difference]: Without dead ends: 297 [2022-02-11 01:08:00,608 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=553, Invalid=2527, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 01:08:00,609 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 148 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:00,609 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 189 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-11 01:08:00,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 136. [2022-02-11 01:08:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.096296296296296) internal successors, (283), 135 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 283 transitions. [2022-02-11 01:08:00,614 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 283 transitions. Word has length 19 [2022-02-11 01:08:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:00,614 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 283 transitions. [2022-02-11 01:08:00,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 283 transitions. [2022-02-11 01:08:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 01:08:00,615 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:00,615 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:00,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:00,827 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,SelfDestructingSolverStorable13 [2022-02-11 01:08:00,827 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:00,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1973771080, now seen corresponding path program 12 times [2022-02-11 01:08:00,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:00,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493920974] [2022-02-11 01:08:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:00,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:00,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493920974] [2022-02-11 01:08:00,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493920974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:00,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167805715] [2022-02-11 01:08:00,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:08:00,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:00,867 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:00,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-11 01:08:00,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-11 01:08:00,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:00,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 01:08:00,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:08:00,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-11 01:08:00,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167805715] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:08:00,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-11 01:08:00,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-02-11 01:08:00,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791040433] [2022-02-11 01:08:00,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:08:00,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:08:00,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:08:00,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:08:00,932 INFO L87 Difference]: Start difference. First operand 136 states and 283 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:00,947 INFO L93 Difference]: Finished difference Result 229 states and 448 transitions. [2022-02-11 01:08:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:08:00,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 [2022-02-11 01:08:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:00,949 INFO L225 Difference]: With dead ends: 229 [2022-02-11 01:08:00,949 INFO L226 Difference]: Without dead ends: 219 [2022-02-11 01:08:00,950 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:08:00,951 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:00,951 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:08:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-11 01:08:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2022-02-11 01:08:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.049382716049383) internal successors, (332), 162 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 332 transitions. [2022-02-11 01:08:00,957 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 332 transitions. Word has length 23 [2022-02-11 01:08:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:00,957 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 332 transitions. [2022-02-11 01:08:00,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 332 transitions. [2022-02-11 01:08:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-11 01:08:00,958 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:00,958 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:00,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:01,181 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,SelfDestructingSolverStorable14 [2022-02-11 01:08:01,181 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:01,181 INFO L85 PathProgramCache]: Analyzing trace with hash 814555854, now seen corresponding path program 13 times [2022-02-11 01:08:01,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:01,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575073144] [2022-02-11 01:08:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:01,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:01,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:01,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575073144] [2022-02-11 01:08:01,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575073144] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:01,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49744510] [2022-02-11 01:08:01,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:08:01,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:01,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:01,218 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:01,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-11 01:08:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:01,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-11 01:08:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:08:01,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-11 01:08:01,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49744510] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-11 01:08:01,288 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-11 01:08:01,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-02-11 01:08:01,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557334693] [2022-02-11 01:08:01,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-11 01:08:01,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-11 01:08:01,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-11 01:08:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:08:01,289 INFO L87 Difference]: Start difference. First operand 163 states and 332 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:01,306 INFO L93 Difference]: Finished difference Result 259 states and 499 transitions. [2022-02-11 01:08:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-11 01:08:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23 [2022-02-11 01:08:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:01,308 INFO L225 Difference]: With dead ends: 259 [2022-02-11 01:08:01,308 INFO L226 Difference]: Without dead ends: 244 [2022-02-11 01:08:01,308 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-11 01:08:01,308 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:01,309 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:08:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-11 01:08:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 183. [2022-02-11 01:08:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0274725274725274) internal successors, (369), 182 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 369 transitions. [2022-02-11 01:08:01,313 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 369 transitions. Word has length 23 [2022-02-11 01:08:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:01,313 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 369 transitions. [2022-02-11 01:08:01,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 369 transitions. [2022-02-11 01:08:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:01,314 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:01,314 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:01,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:01,527 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,SelfDestructingSolverStorable15 [2022-02-11 01:08:01,527 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:01,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1412568645, now seen corresponding path program 14 times [2022-02-11 01:08:01,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:01,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676412634] [2022-02-11 01:08:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:01,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:01,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676412634] [2022-02-11 01:08:01,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676412634] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:01,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996454648] [2022-02-11 01:08:01,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:08:01,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:01,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:01,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:01,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-11 01:08:01,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:08:01,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:02,187 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 [2022-02-11 01:08:02,229 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 [2022-02-11 01:08:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:08:02,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:02,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:02,624 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 36 treesize of output 38 [2022-02-11 01:08:02,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:02,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:08:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:08:02,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996454648] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:02,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:02,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 39 [2022-02-11 01:08:02,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009664434] [2022-02-11 01:08:02,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:02,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 01:08:02,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 01:08:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:08:02,862 INFO L87 Difference]: Start difference. First operand 183 states and 369 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:04,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:04,410 INFO L93 Difference]: Finished difference Result 308 states and 584 transitions. [2022-02-11 01:08:04,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 01:08:04,410 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:04,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:04,412 INFO L225 Difference]: With dead ends: 308 [2022-02-11 01:08:04,412 INFO L226 Difference]: Without dead ends: 292 [2022-02-11 01:08:04,413 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=948, Invalid=5694, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 01:08:04,414 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 271 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:04,414 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 162 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-11 01:08:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 180. [2022-02-11 01:08:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.005586592178771) internal successors, (359), 179 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 359 transitions. [2022-02-11 01:08:04,419 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 359 transitions. Word has length 27 [2022-02-11 01:08:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:04,419 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 359 transitions. [2022-02-11 01:08:04,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 359 transitions. [2022-02-11 01:08:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:04,420 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:04,420 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:04,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:04,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:04,635 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:04,636 INFO L85 PathProgramCache]: Analyzing trace with hash 612406691, now seen corresponding path program 15 times [2022-02-11 01:08:04,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:04,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812682708] [2022-02-11 01:08:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:04,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:04,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:04,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812682708] [2022-02-11 01:08:04,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812682708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:04,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636691038] [2022-02-11 01:08:04,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:08:04,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:04,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:04,993 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:04,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-11 01:08:05,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:08:05,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:05,208 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 [2022-02-11 01:08:05,254 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 [2022-02-11 01:08:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:08:05,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:05,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:05,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-02-11 01:08:05,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:05,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:08:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:08:05,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636691038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:05,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:05,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-02-11 01:08:05,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127265116] [2022-02-11 01:08:05,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:05,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 01:08:05,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:05,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 01:08:05,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 01:08:05,832 INFO L87 Difference]: Start difference. First operand 180 states and 359 transitions. Second operand has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:07,570 INFO L93 Difference]: Finished difference Result 399 states and 757 transitions. [2022-02-11 01:08:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:08:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:07,572 INFO L225 Difference]: With dead ends: 399 [2022-02-11 01:08:07,572 INFO L226 Difference]: Without dead ends: 383 [2022-02-11 01:08:07,575 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=866, Invalid=6444, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 01:08:07,576 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 179 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:07,576 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 168 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:08:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-11 01:08:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 188. [2022-02-11 01:08:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.9893048128342246) internal successors, (372), 187 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 372 transitions. [2022-02-11 01:08:07,582 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 372 transitions. Word has length 27 [2022-02-11 01:08:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:07,582 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 372 transitions. [2022-02-11 01:08:07,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:07,582 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 372 transitions. [2022-02-11 01:08:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:07,583 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:07,583 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:07,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:07,804 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,SelfDestructingSolverStorable17 [2022-02-11 01:08:07,804 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:07,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1200152013, now seen corresponding path program 16 times [2022-02-11 01:08:07,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:07,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868587470] [2022-02-11 01:08:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:07,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:08,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:08,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868587470] [2022-02-11 01:08:08,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868587470] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:08,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437880827] [2022-02-11 01:08:08,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:08:08,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:08,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:08,206 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:08,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-11 01:08:08,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:08:08,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:08,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:08,422 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 [2022-02-11 01:08:08,444 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 [2022-02-11 01:08:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:08:08,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:08,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:08,817 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 38 treesize of output 40 [2022-02-11 01:08:08,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:08,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:08:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:08:09,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437880827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:09,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:09,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 37 [2022-02-11 01:08:09,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906901098] [2022-02-11 01:08:09,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:09,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 01:08:09,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:09,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 01:08:09,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 01:08:09,044 INFO L87 Difference]: Start difference. First operand 188 states and 372 transitions. Second operand has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:10,622 INFO L93 Difference]: Finished difference Result 408 states and 761 transitions. [2022-02-11 01:08:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 01:08:10,623 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:10,624 INFO L225 Difference]: With dead ends: 408 [2022-02-11 01:08:10,624 INFO L226 Difference]: Without dead ends: 395 [2022-02-11 01:08:10,626 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=778, Invalid=6704, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 01:08:10,627 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:10,627 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 191 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:08:10,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-11 01:08:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 212. [2022-02-11 01:08:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.962085308056872) internal successors, (414), 211 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 414 transitions. [2022-02-11 01:08:10,633 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 414 transitions. Word has length 27 [2022-02-11 01:08:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:10,633 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 414 transitions. [2022-02-11 01:08:10,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 414 transitions. [2022-02-11 01:08:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:10,634 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:10,634 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:10,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-11 01:08:10,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:10,839 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash -13235113, now seen corresponding path program 17 times [2022-02-11 01:08:10,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:10,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343415385] [2022-02-11 01:08:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:10,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:11,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:11,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343415385] [2022-02-11 01:08:11,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343415385] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:11,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600886117] [2022-02-11 01:08:11,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:08:11,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:11,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:11,198 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:11,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-11 01:08:11,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:08:11,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:11,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-11 01:08:11,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:11,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:11,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:11,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:11,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:11,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:08:11,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:11,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:08:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:12,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600886117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:12,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:12,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-02-11 01:08:12,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284602179] [2022-02-11 01:08:12,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:12,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 01:08:12,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 01:08:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:08:12,260 INFO L87 Difference]: Start difference. First operand 212 states and 414 transitions. Second operand has 40 states, 40 states have (on average 1.625) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:14,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:14,345 INFO L93 Difference]: Finished difference Result 513 states and 927 transitions. [2022-02-11 01:08:14,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-11 01:08:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 39 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 27 [2022-02-11 01:08:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:14,347 INFO L225 Difference]: With dead ends: 513 [2022-02-11 01:08:14,347 INFO L226 Difference]: Without dead ends: 494 [2022-02-11 01:08:14,349 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1491, Invalid=7065, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 01:08:14,349 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 226 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:14,350 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 227 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1040 Invalid, 0 Unknown, 10 Unchecked, 0.5s Time] [2022-02-11 01:08:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-02-11 01:08:14,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 264. [2022-02-11 01:08:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.9239543726235742) internal successors, (506), 263 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 506 transitions. [2022-02-11 01:08:14,357 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 506 transitions. Word has length 27 [2022-02-11 01:08:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:14,357 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 506 transitions. [2022-02-11 01:08:14,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.625) internal successors, (65), 39 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 506 transitions. [2022-02-11 01:08:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:14,358 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:14,358 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:14,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:14,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:14,580 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:14,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1341932533, now seen corresponding path program 18 times [2022-02-11 01:08:14,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:14,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005664936] [2022-02-11 01:08:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:14,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:14,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:14,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005664936] [2022-02-11 01:08:14,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005664936] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:14,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043168277] [2022-02-11 01:08:14,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:08:14,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:14,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:14,949 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:14,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-11 01:08:14,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:08:14,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:14,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 01:08:14,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:15,437 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:15,438 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 40 treesize of output 26 [2022-02-11 01:08:15,473 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:08:15,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-02-11 01:08:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:15,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:16,251 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:16,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 86 [2022-02-11 01:08:16,693 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:16,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 114 [2022-02-11 01:08:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:16,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043168277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:16,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:16,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-02-11 01:08:16,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129381639] [2022-02-11 01:08:16,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:16,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-11 01:08:16,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:16,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-11 01:08:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:08:16,982 INFO L87 Difference]: Start difference. First operand 264 states and 506 transitions. Second operand has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 46 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:21,681 INFO L93 Difference]: Finished difference Result 578 states and 1032 transitions. [2022-02-11 01:08:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-11 01:08:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 46 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:21,683 INFO L225 Difference]: With dead ends: 578 [2022-02-11 01:08:21,683 INFO L226 Difference]: Without dead ends: 539 [2022-02-11 01:08:21,684 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3141 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1380, Invalid=11052, Unknown=0, NotChecked=0, Total=12432 [2022-02-11 01:08:21,685 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:21,685 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 202 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-11 01:08:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-02-11 01:08:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 286. [2022-02-11 01:08:21,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.912280701754386) internal successors, (545), 285 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 545 transitions. [2022-02-11 01:08:21,693 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 545 transitions. Word has length 27 [2022-02-11 01:08:21,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:21,693 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 545 transitions. [2022-02-11 01:08:21,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.574468085106383) internal successors, (74), 46 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 545 transitions. [2022-02-11 01:08:21,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:21,694 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:21,694 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:21,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:21,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:21,907 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:21,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1639916165, now seen corresponding path program 19 times [2022-02-11 01:08:21,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:21,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900560408] [2022-02-11 01:08:21,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:21,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:22,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:22,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900560408] [2022-02-11 01:08:22,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900560408] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:22,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779158348] [2022-02-11 01:08:22,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:08:22,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:22,284 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:22,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-11 01:08:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:22,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:22,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:22,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:22,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:22,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:22,821 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 36 treesize of output 38 [2022-02-11 01:08:22,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:22,956 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 28 treesize of output 28 [2022-02-11 01:08:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:23,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779158348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:23,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:23,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-11 01:08:23,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106177167] [2022-02-11 01:08:23,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:23,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:08:23,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:08:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:08:23,073 INFO L87 Difference]: Start difference. First operand 286 states and 545 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:24,850 INFO L93 Difference]: Finished difference Result 530 states and 969 transitions. [2022-02-11 01:08:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:08:24,851 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:24,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:24,852 INFO L225 Difference]: With dead ends: 530 [2022-02-11 01:08:24,852 INFO L226 Difference]: Without dead ends: 519 [2022-02-11 01:08:24,853 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=974, Invalid=6166, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 01:08:24,853 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 265 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:24,854 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 281 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:08:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-02-11 01:08:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 297. [2022-02-11 01:08:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.912162162162162) internal successors, (566), 296 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 566 transitions. [2022-02-11 01:08:24,861 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 566 transitions. Word has length 27 [2022-02-11 01:08:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:24,861 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 566 transitions. [2022-02-11 01:08:24,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 566 transitions. [2022-02-11 01:08:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:24,862 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:24,863 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:24,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:25,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:25,087 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash -757850441, now seen corresponding path program 20 times [2022-02-11 01:08:25,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:25,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314328117] [2022-02-11 01:08:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:25,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:25,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:25,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314328117] [2022-02-11 01:08:25,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314328117] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:25,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689284825] [2022-02-11 01:08:25,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:08:25,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:25,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:25,468 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:25,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-11 01:08:25,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:08:25,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:25,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:25,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:25,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:25,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:25,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:26,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:26,000 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 36 treesize of output 38 [2022-02-11 01:08:26,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:26,164 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 28 treesize of output 28 [2022-02-11 01:08:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:26,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689284825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:26,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:26,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-11 01:08:26,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108447609] [2022-02-11 01:08:26,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:26,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:08:26,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:08:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:08:26,276 INFO L87 Difference]: Start difference. First operand 297 states and 566 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:28,453 INFO L93 Difference]: Finished difference Result 620 states and 1155 transitions. [2022-02-11 01:08:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 01:08:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:28,454 INFO L225 Difference]: With dead ends: 620 [2022-02-11 01:08:28,454 INFO L226 Difference]: Without dead ends: 613 [2022-02-11 01:08:28,455 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1224, Invalid=7706, Unknown=0, NotChecked=0, Total=8930 [2022-02-11 01:08:28,455 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 257 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:28,455 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 227 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:08:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-11 01:08:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 308. [2022-02-11 01:08:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.9120521172638436) internal successors, (587), 307 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 587 transitions. [2022-02-11 01:08:28,463 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 587 transitions. Word has length 27 [2022-02-11 01:08:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:28,463 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 587 transitions. [2022-02-11 01:08:28,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 587 transitions. [2022-02-11 01:08:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:28,464 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:28,465 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:28,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:28,687 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,SelfDestructingSolverStorable22 [2022-02-11 01:08:28,687 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash -170105119, now seen corresponding path program 21 times [2022-02-11 01:08:28,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:28,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374953930] [2022-02-11 01:08:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:28,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:29,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:29,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374953930] [2022-02-11 01:08:29,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374953930] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:29,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972558825] [2022-02-11 01:08:29,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:08:29,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:29,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:29,056 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:29,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-11 01:08:29,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:08:29,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:29,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:08:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:29,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:29,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:29,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2022-02-11 01:08:29,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:29,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:29,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:29,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2022-02-11 01:08:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:29,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:29,927 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:29,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 74 [2022-02-11 01:08:30,133 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:08:30,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 108 [2022-02-11 01:08:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:30,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972558825] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:30,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:30,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 35 [2022-02-11 01:08:30,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566224625] [2022-02-11 01:08:30,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:30,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:08:30,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:08:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:08:30,730 INFO L87 Difference]: Start difference. First operand 308 states and 587 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:32,154 INFO L93 Difference]: Finished difference Result 399 states and 738 transitions. [2022-02-11 01:08:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-11 01:08:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:32,155 INFO L225 Difference]: With dead ends: 399 [2022-02-11 01:08:32,155 INFO L226 Difference]: Without dead ends: 392 [2022-02-11 01:08:32,155 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=381, Invalid=3279, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:08:32,156 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:32,156 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 152 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 736 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-02-11 01:08:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-02-11 01:08:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 319. [2022-02-11 01:08:32,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.9088050314465408) internal successors, (607), 318 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 607 transitions. [2022-02-11 01:08:32,162 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 607 transitions. Word has length 27 [2022-02-11 01:08:32,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:32,162 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 607 transitions. [2022-02-11 01:08:32,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:32,163 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 607 transitions. [2022-02-11 01:08:32,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:32,163 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:32,163 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:32,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:32,387 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,SelfDestructingSolverStorable23 [2022-02-11 01:08:32,387 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash 905606037, now seen corresponding path program 22 times [2022-02-11 01:08:32,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:32,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591666606] [2022-02-11 01:08:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:32,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:32,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:32,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591666606] [2022-02-11 01:08:32,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591666606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:32,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703552891] [2022-02-11 01:08:32,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:08:32,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:32,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:32,718 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:32,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-11 01:08:32,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:08:32,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:32,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:32,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:32,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:32,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:32,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:33,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:33,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:08:33,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:33,359 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 30 treesize of output 30 [2022-02-11 01:08:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:33,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703552891] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:33,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:33,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-11 01:08:33,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649523855] [2022-02-11 01:08:33,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:33,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:08:33,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:08:33,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:08:33,473 INFO L87 Difference]: Start difference. First operand 319 states and 607 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:35,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:35,172 INFO L93 Difference]: Finished difference Result 526 states and 970 transitions. [2022-02-11 01:08:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:08:35,172 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:35,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:35,174 INFO L225 Difference]: With dead ends: 526 [2022-02-11 01:08:35,174 INFO L226 Difference]: Without dead ends: 506 [2022-02-11 01:08:35,175 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=945, Invalid=6195, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 01:08:35,175 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:35,175 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 281 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:08:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-02-11 01:08:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 361. [2022-02-11 01:08:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.9055555555555554) internal successors, (686), 360 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 686 transitions. [2022-02-11 01:08:35,182 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 686 transitions. Word has length 27 [2022-02-11 01:08:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:35,183 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 686 transitions. [2022-02-11 01:08:35,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 686 transitions. [2022-02-11 01:08:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:35,184 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:35,184 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:35,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:35,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:35,399 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1914099033, now seen corresponding path program 23 times [2022-02-11 01:08:35,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:35,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501730903] [2022-02-11 01:08:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:35,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:35,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501730903] [2022-02-11 01:08:35,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501730903] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:35,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697474836] [2022-02-11 01:08:35,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:08:35,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:35,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:35,736 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:35,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-11 01:08:35,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:08:35,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:08:35,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:36,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:36,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:36,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:36,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-02-11 01:08:36,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:36,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:36,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:36,469 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 28 treesize of output 30 [2022-02-11 01:08:36,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:36,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:36,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:36,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2022-02-11 01:08:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:36,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697474836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:36,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:36,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-02-11 01:08:36,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687368159] [2022-02-11 01:08:36,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:36,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-11 01:08:36,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-11 01:08:36,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1693, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:08:36,945 INFO L87 Difference]: Start difference. First operand 361 states and 686 transitions. Second operand has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:41,787 INFO L93 Difference]: Finished difference Result 1170 states and 2096 transitions. [2022-02-11 01:08:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-11 01:08:41,787 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 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 27 [2022-02-11 01:08:41,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:41,791 INFO L225 Difference]: With dead ends: 1170 [2022-02-11 01:08:41,791 INFO L226 Difference]: Without dead ends: 1152 [2022-02-11 01:08:41,793 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7367 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3824, Invalid=17346, Unknown=0, NotChecked=0, Total=21170 [2022-02-11 01:08:41,794 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 380 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:41,794 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 412 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1415 Invalid, 0 Unknown, 507 Unchecked, 0.7s Time] [2022-02-11 01:08:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-02-11 01:08:41,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 638. [2022-02-11 01:08:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 1.8869701726844583) internal successors, (1202), 637 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1202 transitions. [2022-02-11 01:08:41,813 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1202 transitions. Word has length 27 [2022-02-11 01:08:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:41,813 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1202 transitions. [2022-02-11 01:08:41,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 44 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1202 transitions. [2022-02-11 01:08:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:41,815 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:41,815 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:41,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:42,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:42,031 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1498802539, now seen corresponding path program 24 times [2022-02-11 01:08:42,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:42,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999871972] [2022-02-11 01:08:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:42,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:42,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999871972] [2022-02-11 01:08:42,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999871972] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:42,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053373088] [2022-02-11 01:08:42,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:08:42,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:42,349 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:42,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-11 01:08:42,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:08:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:08:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:42,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-02-11 01:08:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:42,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:08:42,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:42,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-02-11 01:08:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:43,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:43,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:43,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:43,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 86 [2022-02-11 01:08:44,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:44,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:44,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:44,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 83 [2022-02-11 01:08:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:44,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053373088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:44,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:44,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 45 [2022-02-11 01:08:44,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712270912] [2022-02-11 01:08:44,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:44,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:08:44,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:44,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:08:44,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1829, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:08:44,975 INFO L87 Difference]: Start difference. First operand 638 states and 1202 transitions. Second operand has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:47,170 INFO L93 Difference]: Finished difference Result 947 states and 1746 transitions. [2022-02-11 01:08:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:08:47,170 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 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 27 [2022-02-11 01:08:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:47,173 INFO L225 Difference]: With dead ends: 947 [2022-02-11 01:08:47,173 INFO L226 Difference]: Without dead ends: 933 [2022-02-11 01:08:47,174 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=905, Invalid=6235, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 01:08:47,175 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 193 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:47,176 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 249 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 983 Invalid, 0 Unknown, 830 Unchecked, 0.4s Time] [2022-02-11 01:08:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2022-02-11 01:08:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 655. [2022-02-11 01:08:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.889908256880734) internal successors, (1236), 654 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1236 transitions. [2022-02-11 01:08:47,188 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1236 transitions. Word has length 27 [2022-02-11 01:08:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:47,188 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1236 transitions. [2022-02-11 01:08:47,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 45 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1236 transitions. [2022-02-11 01:08:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:47,190 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:47,190 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:47,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:47,412 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,SelfDestructingSolverStorable26 [2022-02-11 01:08:47,412 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:47,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:47,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1305157107, now seen corresponding path program 25 times [2022-02-11 01:08:47,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:47,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585106196] [2022-02-11 01:08:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:47,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:47,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:47,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585106196] [2022-02-11 01:08:47,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585106196] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:47,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999890882] [2022-02-11 01:08:47,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:08:47,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:47,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:47,666 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:47,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-11 01:08:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:47,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:47,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:47,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:47,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:47,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:48,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:48,098 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 36 treesize of output 38 [2022-02-11 01:08:48,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:48,213 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 30 treesize of output 30 [2022-02-11 01:08:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:48,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999890882] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:48,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:48,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:08:48,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496316610] [2022-02-11 01:08:48,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:48,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:08:48,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:08:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:08:48,327 INFO L87 Difference]: Start difference. First operand 655 states and 1236 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:49,779 INFO L93 Difference]: Finished difference Result 1480 states and 2705 transitions. [2022-02-11 01:08:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-11 01:08:49,780 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:49,783 INFO L225 Difference]: With dead ends: 1480 [2022-02-11 01:08:49,783 INFO L226 Difference]: Without dead ends: 1460 [2022-02-11 01:08:49,784 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=5523, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:08:49,784 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:49,784 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 177 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:08:49,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-02-11 01:08:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 653. [2022-02-11 01:08:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.8957055214723926) internal successors, (1236), 652 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1236 transitions. [2022-02-11 01:08:49,798 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1236 transitions. Word has length 27 [2022-02-11 01:08:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:49,798 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1236 transitions. [2022-02-11 01:08:49,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1236 transitions. [2022-02-11 01:08:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:49,799 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:49,799 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:49,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:50,020 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,SelfDestructingSolverStorable27 [2022-02-11 01:08:50,020 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash -423091383, now seen corresponding path program 26 times [2022-02-11 01:08:50,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:50,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859724747] [2022-02-11 01:08:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:50,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:50,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:50,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859724747] [2022-02-11 01:08:50,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859724747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:50,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186289141] [2022-02-11 01:08:50,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:08:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:50,258 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:50,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-11 01:08:50,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:08:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:50,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:50,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:50,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:50,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:50,673 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 36 treesize of output 38 [2022-02-11 01:08:50,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:50,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:08:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:50,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186289141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:50,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:50,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:08:50,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432771983] [2022-02-11 01:08:50,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:50,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:08:50,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:50,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:08:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:08:50,910 INFO L87 Difference]: Start difference. First operand 653 states and 1236 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:52,079 INFO L93 Difference]: Finished difference Result 890 states and 1655 transitions. [2022-02-11 01:08:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-11 01:08:52,080 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:52,082 INFO L225 Difference]: With dead ends: 890 [2022-02-11 01:08:52,082 INFO L226 Difference]: Without dead ends: 867 [2022-02-11 01:08:52,083 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=696, Invalid=4274, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 01:08:52,083 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 173 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:52,083 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 196 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-02-11 01:08:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 398. [2022-02-11 01:08:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.942065491183879) internal successors, (771), 397 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 771 transitions. [2022-02-11 01:08:52,092 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 771 transitions. Word has length 27 [2022-02-11 01:08:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:52,092 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 771 transitions. [2022-02-11 01:08:52,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 771 transitions. [2022-02-11 01:08:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:52,093 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:52,093 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:52,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:52,315 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,SelfDestructingSolverStorable28 [2022-02-11 01:08:52,315 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:52,315 INFO L85 PathProgramCache]: Analyzing trace with hash 376679803, now seen corresponding path program 27 times [2022-02-11 01:08:52,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:52,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603575794] [2022-02-11 01:08:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:52,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:52,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:52,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603575794] [2022-02-11 01:08:52,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603575794] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:52,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810828984] [2022-02-11 01:08:52,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:08:52,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:52,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:52,572 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:52,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-11 01:08:52,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:08:52,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:52,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:52,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:52,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:52,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:52,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:53,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:53,035 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 36 treesize of output 38 [2022-02-11 01:08:53,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:53,165 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 30 treesize of output 30 [2022-02-11 01:08:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:53,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810828984] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:53,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:53,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:08:53,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368473615] [2022-02-11 01:08:53,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:53,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:08:53,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:08:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:08:53,269 INFO L87 Difference]: Start difference. First operand 398 states and 771 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:55,179 INFO L93 Difference]: Finished difference Result 894 states and 1661 transitions. [2022-02-11 01:08:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 01:08:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:55,182 INFO L225 Difference]: With dead ends: 894 [2022-02-11 01:08:55,182 INFO L226 Difference]: Without dead ends: 881 [2022-02-11 01:08:55,183 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1052, Invalid=6958, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 01:08:55,183 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 181 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:55,183 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 201 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:08:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-02-11 01:08:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 554. [2022-02-11 01:08:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.9095840867992766) internal successors, (1056), 553 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1056 transitions. [2022-02-11 01:08:55,194 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1056 transitions. Word has length 27 [2022-02-11 01:08:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:55,194 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1056 transitions. [2022-02-11 01:08:55,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1056 transitions. [2022-02-11 01:08:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:55,195 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:55,195 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:55,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:55,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:55,418 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:55,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1258745527, now seen corresponding path program 28 times [2022-02-11 01:08:55,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:55,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067191290] [2022-02-11 01:08:55,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:55,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:55,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:55,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067191290] [2022-02-11 01:08:55,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067191290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:55,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701886192] [2022-02-11 01:08:55,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:08:55,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:55,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:55,651 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:55,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-11 01:08:55,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:08:55,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:55,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:55,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:55,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:55,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:55,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:56,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:56,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:08:56,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:56,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:08:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:56,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701886192] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:56,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:56,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:08:56,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877781355] [2022-02-11 01:08:56,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:56,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:08:56,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:08:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:08:56,302 INFO L87 Difference]: Start difference. First operand 554 states and 1056 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:57,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:08:57,263 INFO L93 Difference]: Finished difference Result 666 states and 1254 transitions. [2022-02-11 01:08:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 01:08:57,264 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:08:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:08:57,265 INFO L225 Difference]: With dead ends: 666 [2022-02-11 01:08:57,265 INFO L226 Difference]: Without dead ends: 646 [2022-02-11 01:08:57,266 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=539, Invalid=2883, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:08:57,266 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 214 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:08:57,266 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 177 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:08:57,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-02-11 01:08:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 411. [2022-02-11 01:08:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.9146341463414633) internal successors, (785), 410 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 785 transitions. [2022-02-11 01:08:57,273 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 785 transitions. Word has length 27 [2022-02-11 01:08:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:08:57,273 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 785 transitions. [2022-02-11 01:08:57,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:08:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 785 transitions. [2022-02-11 01:08:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:08:57,274 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:08:57,274 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:08:57,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-11 01:08:57,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:57,494 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:08:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:08:57,494 INFO L85 PathProgramCache]: Analyzing trace with hash 379329915, now seen corresponding path program 29 times [2022-02-11 01:08:57,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:08:57,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176367265] [2022-02-11 01:08:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:08:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:08:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:08:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:57,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:08:57,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176367265] [2022-02-11 01:08:57,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176367265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:08:57,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837594647] [2022-02-11 01:08:57,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:08:57,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:08:57,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:08:57,744 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:08:57,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-11 01:08:57,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:08:57,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:08:57,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:08:57,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:08:58,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:08:58,017 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 01:08:58,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:08:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:58,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:08:58,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:58,338 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 36 treesize of output 38 [2022-02-11 01:08:58,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:08:58,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:08:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:08:58,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837594647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:08:58,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:08:58,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-02-11 01:08:58,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089365772] [2022-02-11 01:08:58,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:08:58,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-11 01:08:58,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:08:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-11 01:08:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 01:08:58,730 INFO L87 Difference]: Start difference. First operand 411 states and 785 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:02,218 INFO L93 Difference]: Finished difference Result 1310 states and 2390 transitions. [2022-02-11 01:09:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-11 01:09:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 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 27 [2022-02-11 01:09:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:02,222 INFO L225 Difference]: With dead ends: 1310 [2022-02-11 01:09:02,222 INFO L226 Difference]: Without dead ends: 1276 [2022-02-11 01:09:02,223 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4624 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1729, Invalid=12077, Unknown=0, NotChecked=0, Total=13806 [2022-02-11 01:09:02,223 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 613 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:02,223 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 410 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1094 Invalid, 0 Unknown, 392 Unchecked, 0.6s Time] [2022-02-11 01:09:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-02-11 01:09:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 578. [2022-02-11 01:09:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.923743500866551) internal successors, (1110), 577 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1110 transitions. [2022-02-11 01:09:02,234 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1110 transitions. Word has length 27 [2022-02-11 01:09:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:02,234 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1110 transitions. [2022-02-11 01:09:02,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1110 transitions. [2022-02-11 01:09:02,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:02,236 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:02,236 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:02,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:02,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:02,451 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:02,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1261395639, now seen corresponding path program 30 times [2022-02-11 01:09:02,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:02,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056655753] [2022-02-11 01:09:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:02,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:02,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:02,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056655753] [2022-02-11 01:09:02,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056655753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:02,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852342651] [2022-02-11 01:09:02,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:09:02,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:02,671 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:02,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-11 01:09:02,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:09:02,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:02,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:02,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:02,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:02,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:03,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:03,079 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 36 treesize of output 38 [2022-02-11 01:09:03,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:03,212 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 30 treesize of output 30 [2022-02-11 01:09:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:03,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852342651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:03,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:03,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-02-11 01:09:03,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900819762] [2022-02-11 01:09:03,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:03,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:09:03,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:03,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:09:03,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:09:03,317 INFO L87 Difference]: Start difference. First operand 578 states and 1110 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:04,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:04,859 INFO L93 Difference]: Finished difference Result 1260 states and 2309 transitions. [2022-02-11 01:09:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 01:09:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:04,863 INFO L225 Difference]: With dead ends: 1260 [2022-02-11 01:09:04,863 INFO L226 Difference]: Without dead ends: 1244 [2022-02-11 01:09:04,864 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 28 SyntacticMatches, 14 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=874, Invalid=4826, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 01:09:04,864 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 203 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:04,864 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 163 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2022-02-11 01:09:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 678. [2022-02-11 01:09:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9039881831610044) internal successors, (1289), 677 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1289 transitions. [2022-02-11 01:09:04,877 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1289 transitions. Word has length 27 [2022-02-11 01:09:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:04,877 INFO L470 AbstractCegarLoop]: Abstraction has 678 states and 1289 transitions. [2022-02-11 01:09:04,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1289 transitions. [2022-02-11 01:09:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:04,879 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:04,879 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:04,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:05,100 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,SelfDestructingSolverStorable32 [2022-02-11 01:09:05,101 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1849140961, now seen corresponding path program 31 times [2022-02-11 01:09:05,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:05,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246229839] [2022-02-11 01:09:05,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:05,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:05,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246229839] [2022-02-11 01:09:05,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246229839] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:05,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676662009] [2022-02-11 01:09:05,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:09:05,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:05,316 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:05,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-11 01:09:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:05,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:05,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:05,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:05,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:05,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:05,720 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 36 treesize of output 38 [2022-02-11 01:09:05,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:05,834 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 30 treesize of output 30 [2022-02-11 01:09:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:05,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676662009] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:05,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:05,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-02-11 01:09:05,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306830658] [2022-02-11 01:09:05,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:05,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:09:05,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:09:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:09:05,943 INFO L87 Difference]: Start difference. First operand 678 states and 1289 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:07,128 INFO L93 Difference]: Finished difference Result 1306 states and 2388 transitions. [2022-02-11 01:09:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:09:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:07,131 INFO L225 Difference]: With dead ends: 1306 [2022-02-11 01:09:07,131 INFO L226 Difference]: Without dead ends: 1283 [2022-02-11 01:09:07,132 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=4277, Unknown=0, NotChecked=0, Total=4970 [2022-02-11 01:09:07,132 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:07,133 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 133 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-02-11 01:09:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 680. [2022-02-11 01:09:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 1.905743740795287) internal successors, (1294), 679 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 1294 transitions. [2022-02-11 01:09:07,145 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 1294 transitions. Word has length 27 [2022-02-11 01:09:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:07,145 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 1294 transitions. [2022-02-11 01:09:07,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 1294 transitions. [2022-02-11 01:09:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:07,147 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:07,147 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:07,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:07,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:07,368 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash -361622183, now seen corresponding path program 32 times [2022-02-11 01:09:07,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:07,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539758767] [2022-02-11 01:09:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:07,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:07,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539758767] [2022-02-11 01:09:07,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539758767] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:07,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992663885] [2022-02-11 01:09:07,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:09:07,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:07,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:07,748 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:07,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-11 01:09:07,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:09:07,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:07,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:07,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:08,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:08,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:08,315 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 36 treesize of output 38 [2022-02-11 01:09:08,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:08,451 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 30 treesize of output 30 [2022-02-11 01:09:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:08,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992663885] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:08,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:08,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-02-11 01:09:08,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35206958] [2022-02-11 01:09:08,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:08,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:09:08,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:09:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:09:08,568 INFO L87 Difference]: Start difference. First operand 680 states and 1294 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:09,620 INFO L93 Difference]: Finished difference Result 900 states and 1670 transitions. [2022-02-11 01:09:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 01:09:09,621 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:09,623 INFO L225 Difference]: With dead ends: 900 [2022-02-11 01:09:09,623 INFO L226 Difference]: Without dead ends: 889 [2022-02-11 01:09:09,623 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=688, Invalid=3602, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 01:09:09,624 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:09,624 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 132 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:09:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-11 01:09:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 685. [2022-02-11 01:09:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 1.909356725146199) internal successors, (1306), 684 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1306 transitions. [2022-02-11 01:09:09,634 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1306 transitions. Word has length 27 [2022-02-11 01:09:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:09,634 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 1306 transitions. [2022-02-11 01:09:09,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1306 transitions. [2022-02-11 01:09:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:09,636 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:09,636 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:09,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-11 01:09:09,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:09,845 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash 520443541, now seen corresponding path program 33 times [2022-02-11 01:09:09,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:09,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328555754] [2022-02-11 01:09:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:10,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:10,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328555754] [2022-02-11 01:09:10,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328555754] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:10,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292377210] [2022-02-11 01:09:10,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:10,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:10,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:10,195 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:10,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-11 01:09:10,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:09:10,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:10,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 01:09:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:10,542 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-11 01:09:10,543 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 46 treesize of output 32 [2022-02-11 01:09:10,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:10,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:09:10,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2022-02-11 01:09:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:10,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:11,424 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-11 01:09:11,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 80 [2022-02-11 01:09:11,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:11,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:11,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:11,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:11,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 69 [2022-02-11 01:09:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:12,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292377210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:12,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:12,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 45 [2022-02-11 01:09:12,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200470906] [2022-02-11 01:09:12,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:12,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:09:12,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:12,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:09:12,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:09:12,011 INFO L87 Difference]: Start difference. First operand 685 states and 1306 transitions. Second operand has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:16,092 INFO L93 Difference]: Finished difference Result 1161 states and 2133 transitions. [2022-02-11 01:09:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 01:09:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:16,095 INFO L225 Difference]: With dead ends: 1161 [2022-02-11 01:09:16,096 INFO L226 Difference]: Without dead ends: 1134 [2022-02-11 01:09:16,096 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1382, Invalid=8718, Unknown=0, NotChecked=0, Total=10100 [2022-02-11 01:09:16,097 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 434 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 511 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:16,097 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 355 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1466 Invalid, 0 Unknown, 511 Unchecked, 0.7s Time] [2022-02-11 01:09:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-02-11 01:09:16,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 722. [2022-02-11 01:09:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.9292649098474342) internal successors, (1391), 721 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1391 transitions. [2022-02-11 01:09:16,107 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1391 transitions. Word has length 27 [2022-02-11 01:09:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:16,107 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1391 transitions. [2022-02-11 01:09:16,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.4782608695652173) internal successors, (68), 45 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1391 transitions. [2022-02-11 01:09:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:16,108 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:16,109 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:16,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:16,321 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,SelfDestructingSolverStorable35 [2022-02-11 01:09:16,321 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1663353153, now seen corresponding path program 34 times [2022-02-11 01:09:16,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:16,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063022940] [2022-02-11 01:09:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:16,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:16,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:16,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063022940] [2022-02-11 01:09:16,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063022940] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:16,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137286651] [2022-02-11 01:09:16,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:09:16,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:16,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:16,652 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:16,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-11 01:09:16,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:09:16,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:16,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:16,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:16,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:16,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:16,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:17,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:17,175 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 36 treesize of output 38 [2022-02-11 01:09:17,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:17,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:09:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:17,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137286651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:17,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:17,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-02-11 01:09:17,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005495795] [2022-02-11 01:09:17,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:17,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:09:17,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:09:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:09:17,429 INFO L87 Difference]: Start difference. First operand 722 states and 1391 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:19,109 INFO L93 Difference]: Finished difference Result 1223 states and 2264 transitions. [2022-02-11 01:09:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 01:09:19,109 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:19,113 INFO L225 Difference]: With dead ends: 1223 [2022-02-11 01:09:19,113 INFO L226 Difference]: Without dead ends: 1210 [2022-02-11 01:09:19,114 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=838, Invalid=6134, Unknown=0, NotChecked=0, Total=6972 [2022-02-11 01:09:19,114 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 116 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:19,114 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 143 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2022-02-11 01:09:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 722. [2022-02-11 01:09:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.926490984743412) internal successors, (1389), 721 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1389 transitions. [2022-02-11 01:09:19,124 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1389 transitions. Word has length 27 [2022-02-11 01:09:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:19,124 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1389 transitions. [2022-02-11 01:09:19,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1389 transitions. [2022-02-11 01:09:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:19,125 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:19,125 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:19,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-11 01:09:19,333 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,SelfDestructingSolverStorable36 [2022-02-11 01:09:19,333 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1899041413, now seen corresponding path program 35 times [2022-02-11 01:09:19,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:19,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631192692] [2022-02-11 01:09:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:19,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:19,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:19,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631192692] [2022-02-11 01:09:19,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631192692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:19,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374906130] [2022-02-11 01:09:19,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:09:19,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:19,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:19,651 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:19,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-11 01:09:19,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-11 01:09:19,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:19,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-11 01:09:19,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:19,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:19,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:19,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:20,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:20,165 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 36 treesize of output 38 [2022-02-11 01:09:20,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:20,296 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 28 treesize of output 28 [2022-02-11 01:09:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:20,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374906130] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:20,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:20,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-02-11 01:09:20,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856232451] [2022-02-11 01:09:20,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:20,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:09:20,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:20,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:09:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:09:20,405 INFO L87 Difference]: Start difference. First operand 722 states and 1389 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:22,001 INFO L93 Difference]: Finished difference Result 1211 states and 2258 transitions. [2022-02-11 01:09:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:09:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:22,004 INFO L225 Difference]: With dead ends: 1211 [2022-02-11 01:09:22,005 INFO L226 Difference]: Without dead ends: 1198 [2022-02-11 01:09:22,005 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=998, Invalid=5164, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 01:09:22,006 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:22,007 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 170 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:09:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-02-11 01:09:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 723. [2022-02-11 01:09:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.9265927977839334) internal successors, (1391), 722 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1391 transitions. [2022-02-11 01:09:22,018 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1391 transitions. Word has length 27 [2022-02-11 01:09:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:22,018 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1391 transitions. [2022-02-11 01:09:22,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:22,018 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1391 transitions. [2022-02-11 01:09:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:22,019 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:22,019 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:22,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-11 01:09:22,225 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,SelfDestructingSolverStorable37 [2022-02-11 01:09:22,225 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:22,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1016975689, now seen corresponding path program 36 times [2022-02-11 01:09:22,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:22,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237994966] [2022-02-11 01:09:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:22,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:22,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:22,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237994966] [2022-02-11 01:09:22,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237994966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:22,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450820451] [2022-02-11 01:09:22,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:09:22,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:22,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:22,556 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:22,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-11 01:09:22,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-11 01:09:22,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:22,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:22,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:22,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:22,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:22,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:23,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:23,087 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 36 treesize of output 38 [2022-02-11 01:09:23,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:23,222 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 28 treesize of output 28 [2022-02-11 01:09:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:23,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450820451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:23,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:23,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 35 [2022-02-11 01:09:23,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479959597] [2022-02-11 01:09:23,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:23,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:09:23,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:09:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:09:23,332 INFO L87 Difference]: Start difference. First operand 723 states and 1391 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:24,489 INFO L93 Difference]: Finished difference Result 880 states and 1662 transitions. [2022-02-11 01:09:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 01:09:24,490 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:24,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:24,492 INFO L225 Difference]: With dead ends: 880 [2022-02-11 01:09:24,492 INFO L226 Difference]: Without dead ends: 870 [2022-02-11 01:09:24,493 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:09:24,493 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 148 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:24,493 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 144 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:09:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-02-11 01:09:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 718. [2022-02-11 01:09:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.9246861924686192) internal successors, (1380), 717 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1380 transitions. [2022-02-11 01:09:24,504 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1380 transitions. Word has length 27 [2022-02-11 01:09:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:24,504 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 1380 transitions. [2022-02-11 01:09:24,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1380 transitions. [2022-02-11 01:09:24,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:24,506 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:24,506 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:24,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:24,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-11 01:09:24,719 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1380174579, now seen corresponding path program 37 times [2022-02-11 01:09:24,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:24,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005308768] [2022-02-11 01:09:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:24,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:24,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005308768] [2022-02-11 01:09:24,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005308768] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:24,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151473290] [2022-02-11 01:09:24,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:09:24,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:24,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:24,972 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:24,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-11 01:09:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:25,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:25,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:25,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:25,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:25,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:09:25,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:25,567 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 30 treesize of output 30 [2022-02-11 01:09:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:25,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151473290] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:25,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:25,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:09:25,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496838622] [2022-02-11 01:09:25,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:25,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:09:25,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:09:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:09:25,677 INFO L87 Difference]: Start difference. First operand 718 states and 1380 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:27,610 INFO L93 Difference]: Finished difference Result 1467 states and 2719 transitions. [2022-02-11 01:09:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-11 01:09:27,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:27,613 INFO L225 Difference]: With dead ends: 1467 [2022-02-11 01:09:27,614 INFO L226 Difference]: Without dead ends: 1451 [2022-02-11 01:09:27,615 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1052, Invalid=6958, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 01:09:27,615 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 264 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:27,615 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 162 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-02-11 01:09:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 978. [2022-02-11 01:09:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 1.8894575230296826) internal successors, (1846), 977 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1846 transitions. [2022-02-11 01:09:27,632 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1846 transitions. Word has length 27 [2022-02-11 01:09:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:27,632 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1846 transitions. [2022-02-11 01:09:27,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1846 transitions. [2022-02-11 01:09:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:27,633 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:27,633 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:27,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-11 01:09:27,833 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,SelfDestructingSolverStorable39 [2022-02-11 01:09:27,834 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1967919901, now seen corresponding path program 38 times [2022-02-11 01:09:27,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:27,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106047016] [2022-02-11 01:09:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:28,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:28,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106047016] [2022-02-11 01:09:28,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106047016] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:28,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801780574] [2022-02-11 01:09:28,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:09:28,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:28,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:28,060 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:28,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-11 01:09:28,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:09:28,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:28,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:28,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:28,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:28,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:28,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:09:28,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:28,600 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 30 treesize of output 30 [2022-02-11 01:09:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:28,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801780574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:28,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:28,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:09:28,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810203044] [2022-02-11 01:09:28,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:28,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:09:28,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:28,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:09:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:09:28,707 INFO L87 Difference]: Start difference. First operand 978 states and 1846 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:30,190 INFO L93 Difference]: Finished difference Result 1926 states and 3499 transitions. [2022-02-11 01:09:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-11 01:09:30,190 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:30,194 INFO L225 Difference]: With dead ends: 1926 [2022-02-11 01:09:30,194 INFO L226 Difference]: Without dead ends: 1903 [2022-02-11 01:09:30,194 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=5523, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:09:30,195 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 186 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:30,195 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 145 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-02-11 01:09:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 978. [2022-02-11 01:09:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 1.8904810644831116) internal successors, (1847), 977 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1847 transitions. [2022-02-11 01:09:30,210 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1847 transitions. Word has length 27 [2022-02-11 01:09:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:30,210 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1847 transitions. [2022-02-11 01:09:30,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1847 transitions. [2022-02-11 01:09:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:30,212 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:30,212 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:30,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:30,413 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,SelfDestructingSolverStorable40 [2022-02-11 01:09:30,413 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash -242843243, now seen corresponding path program 39 times [2022-02-11 01:09:30,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:30,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817082310] [2022-02-11 01:09:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:30,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:30,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817082310] [2022-02-11 01:09:30,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817082310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:30,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047268006] [2022-02-11 01:09:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:30,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:30,742 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:30,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-11 01:09:30,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:09:30,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:30,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:30,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:30,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:30,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:31,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:31,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:31,276 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 36 treesize of output 38 [2022-02-11 01:09:31,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:31,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:09:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:31,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047268006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:31,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:31,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-11 01:09:31,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339508239] [2022-02-11 01:09:31,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:31,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:09:31,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:31,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:09:31,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:09:31,526 INFO L87 Difference]: Start difference. First operand 978 states and 1847 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:33,081 INFO L93 Difference]: Finished difference Result 1472 states and 2739 transitions. [2022-02-11 01:09:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 01:09:33,081 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:33,084 INFO L225 Difference]: With dead ends: 1472 [2022-02-11 01:09:33,084 INFO L226 Difference]: Without dead ends: 1461 [2022-02-11 01:09:33,085 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=900, Invalid=5742, Unknown=0, NotChecked=0, Total=6642 [2022-02-11 01:09:33,085 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:33,085 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 159 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-02-11 01:09:33,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 986. [2022-02-11 01:09:33,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.8944162436548224) internal successors, (1866), 985 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1866 transitions. [2022-02-11 01:09:33,098 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1866 transitions. Word has length 27 [2022-02-11 01:09:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:33,098 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1866 transitions. [2022-02-11 01:09:33,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1866 transitions. [2022-02-11 01:09:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:33,100 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:33,100 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:33,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:33,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-02-11 01:09:33,300 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 639222481, now seen corresponding path program 40 times [2022-02-11 01:09:33,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:33,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545744511] [2022-02-11 01:09:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:33,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:33,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:33,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545744511] [2022-02-11 01:09:33,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545744511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:33,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471276163] [2022-02-11 01:09:33,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:09:33,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:33,688 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:33,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-11 01:09:33,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:09:33,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:33,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:33,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:33,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:34,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:34,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:34,262 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 36 treesize of output 38 [2022-02-11 01:09:34,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:34,401 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 30 treesize of output 30 [2022-02-11 01:09:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:34,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471276163] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:34,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:34,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-11 01:09:34,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828363612] [2022-02-11 01:09:34,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:34,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:09:34,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:09:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:09:34,535 INFO L87 Difference]: Start difference. First operand 986 states and 1866 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:36,398 INFO L93 Difference]: Finished difference Result 2214 states and 4036 transitions. [2022-02-11 01:09:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-11 01:09:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:36,403 INFO L225 Difference]: With dead ends: 2214 [2022-02-11 01:09:36,403 INFO L226 Difference]: Without dead ends: 2191 [2022-02-11 01:09:36,405 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1019, Invalid=7537, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 01:09:36,405 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 202 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:36,405 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 121 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2022-02-11 01:09:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 984. [2022-02-11 01:09:36,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.8931841302136316) internal successors, (1861), 983 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1861 transitions. [2022-02-11 01:09:36,427 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1861 transitions. Word has length 27 [2022-02-11 01:09:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:36,427 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1861 transitions. [2022-02-11 01:09:36,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1861 transitions. [2022-02-11 01:09:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:36,429 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:36,429 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:36,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:36,643 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,SelfDestructingSolverStorable42 [2022-02-11 01:09:36,643 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:36,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1780262473, now seen corresponding path program 41 times [2022-02-11 01:09:36,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:36,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917486601] [2022-02-11 01:09:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:36,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:36,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917486601] [2022-02-11 01:09:36,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917486601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:36,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125268680] [2022-02-11 01:09:36,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:09:36,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:36,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:36,988 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:36,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-11 01:09:37,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:09:37,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 01:09:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:37,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:09:37,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:37,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-02-11 01:09:37,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:37,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 01:09:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:37,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:38,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:38,059 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 36 treesize of output 36 [2022-02-11 01:09:38,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:38,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:38,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:38,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-02-11 01:09:38,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:38,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:38,267 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-02-11 01:09:38,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 16 [2022-02-11 01:09:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:38,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125268680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:38,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:38,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-02-11 01:09:38,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712479345] [2022-02-11 01:09:38,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:38,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-11 01:09:38,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:38,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-11 01:09:38,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:09:38,421 INFO L87 Difference]: Start difference. First operand 984 states and 1861 transitions. Second operand has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 46 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:42,823 INFO L93 Difference]: Finished difference Result 2053 states and 3739 transitions. [2022-02-11 01:09:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-11 01:09:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 46 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 27 [2022-02-11 01:09:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:42,826 INFO L225 Difference]: With dead ends: 2053 [2022-02-11 01:09:42,826 INFO L226 Difference]: Without dead ends: 2037 [2022-02-11 01:09:42,827 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2583, Invalid=12917, Unknown=0, NotChecked=0, Total=15500 [2022-02-11 01:09:42,828 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 220 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 884 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:42,828 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 247 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1404 Invalid, 0 Unknown, 884 Unchecked, 0.7s Time] [2022-02-11 01:09:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2022-02-11 01:09:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1209. [2022-02-11 01:09:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 1.8948675496688743) internal successors, (2289), 1208 states have internal predecessors, (2289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2289 transitions. [2022-02-11 01:09:42,849 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2289 transitions. Word has length 27 [2022-02-11 01:09:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:42,849 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2289 transitions. [2022-02-11 01:09:42,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 46 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2289 transitions. [2022-02-11 01:09:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:42,851 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:42,851 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:42,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:43,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:43,059 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:43,060 INFO L85 PathProgramCache]: Analyzing trace with hash -898196749, now seen corresponding path program 42 times [2022-02-11 01:09:43,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:43,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107939165] [2022-02-11 01:09:43,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:43,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:43,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:43,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107939165] [2022-02-11 01:09:43,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107939165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:43,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717764561] [2022-02-11 01:09:43,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:09:43,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:43,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:43,379 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:43,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-11 01:09:43,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:09:43,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:43,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-11 01:09:43,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:43,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:43,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:43,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:43,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:43,980 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:09:44,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:44,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-11 01:09:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:44,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717764561] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:44,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:44,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-02-11 01:09:44,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738329177] [2022-02-11 01:09:44,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-11 01:09:44,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-11 01:09:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-02-11 01:09:44,302 INFO L87 Difference]: Start difference. First operand 1209 states and 2289 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 39 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:46,137 INFO L93 Difference]: Finished difference Result 1657 states and 3072 transitions. [2022-02-11 01:09:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:09:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 39 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:46,140 INFO L225 Difference]: With dead ends: 1657 [2022-02-11 01:09:46,140 INFO L226 Difference]: Without dead ends: 1647 [2022-02-11 01:09:46,141 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1238, Invalid=6952, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 01:09:46,141 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 227 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:46,141 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 147 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2022-02-11 01:09:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1212. [2022-02-11 01:09:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 1.8976052848885219) internal successors, (2298), 1211 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2298 transitions. [2022-02-11 01:09:46,156 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2298 transitions. Word has length 27 [2022-02-11 01:09:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:46,156 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 2298 transitions. [2022-02-11 01:09:46,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 39 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2298 transitions. [2022-02-11 01:09:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-11 01:09:46,158 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:46,158 INFO L515 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:46,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:46,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:46,384 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash -290857477, now seen corresponding path program 43 times [2022-02-11 01:09:46,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:46,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574492896] [2022-02-11 01:09:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:46,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:46,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:46,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574492896] [2022-02-11 01:09:46,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574492896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:46,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777830562] [2022-02-11 01:09:46,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:09:46,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:46,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:46,701 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:46,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-11 01:09:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:46,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-11 01:09:46,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:46,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:46,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:46,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:47,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:47,233 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 36 treesize of output 38 [2022-02-11 01:09:47,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:47,372 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 28 treesize of output 28 [2022-02-11 01:09:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:47,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777830562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:47,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:47,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-02-11 01:09:47,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862197477] [2022-02-11 01:09:47,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:47,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:09:47,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:47,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:09:47,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:09:47,479 INFO L87 Difference]: Start difference. First operand 1212 states and 2298 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:49,543 INFO L93 Difference]: Finished difference Result 1977 states and 3673 transitions. [2022-02-11 01:09:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:09:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-11 01:09:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:49,546 INFO L225 Difference]: With dead ends: 1977 [2022-02-11 01:09:49,546 INFO L226 Difference]: Without dead ends: 1964 [2022-02-11 01:09:49,547 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1038, Invalid=7518, Unknown=0, NotChecked=0, Total=8556 [2022-02-11 01:09:49,547 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 172 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:49,547 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 130 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:09:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-02-11 01:09:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1211. [2022-02-11 01:09:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.8933884297520662) internal successors, (2291), 1210 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2291 transitions. [2022-02-11 01:09:49,567 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2291 transitions. Word has length 27 [2022-02-11 01:09:49,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:49,567 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 2291 transitions. [2022-02-11 01:09:49,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:49,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2291 transitions. [2022-02-11 01:09:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 01:09:49,569 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:49,569 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:49,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:49,783 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,SelfDestructingSolverStorable45 [2022-02-11 01:09:49,783 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 459995390, now seen corresponding path program 44 times [2022-02-11 01:09:49,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:49,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944265924] [2022-02-11 01:09:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:09:49,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:49,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944265924] [2022-02-11 01:09:49,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944265924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:49,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568209351] [2022-02-11 01:09:49,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:09:49,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:49,813 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:49,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-11 01:09:49,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:09:49,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:49,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:09:49,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:49,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:49,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568209351] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:49,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:49,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:09:49,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077030314] [2022-02-11 01:09:49,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:49,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:09:49,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:09:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:09:49,983 INFO L87 Difference]: Start difference. First operand 1211 states and 2291 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:50,015 INFO L93 Difference]: Finished difference Result 1357 states and 2559 transitions. [2022-02-11 01:09:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:09:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-11 01:09:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:50,018 INFO L225 Difference]: With dead ends: 1357 [2022-02-11 01:09:50,018 INFO L226 Difference]: Without dead ends: 1342 [2022-02-11 01:09:50,019 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:09:50,019 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:50,019 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 46 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:09:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-02-11 01:09:50,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 730. [2022-02-11 01:09:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.9423868312757202) internal successors, (1416), 729 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1416 transitions. [2022-02-11 01:09:50,032 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1416 transitions. Word has length 31 [2022-02-11 01:09:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:50,033 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1416 transitions. [2022-02-11 01:09:50,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1416 transitions. [2022-02-11 01:09:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-11 01:09:50,034 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:50,034 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:50,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:50,255 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,SelfDestructingSolverStorable46 [2022-02-11 01:09:50,255 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1144638270, now seen corresponding path program 45 times [2022-02-11 01:09:50,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:50,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642252347] [2022-02-11 01:09:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:09:50,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:50,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642252347] [2022-02-11 01:09:50,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642252347] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:50,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143280848] [2022-02-11 01:09:50,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:09:50,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:50,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:50,283 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:50,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-11 01:09:50,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-11 01:09:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-11 01:09:50,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:09:50,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:09:50,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143280848] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:50,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:50,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-02-11 01:09:50,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336286964] [2022-02-11 01:09:50,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:50,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-11 01:09:50,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-11 01:09:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:09:50,426 INFO L87 Difference]: Start difference. First operand 730 states and 1416 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:50,442 INFO L93 Difference]: Finished difference Result 591 states and 1059 transitions. [2022-02-11 01:09:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-11 01:09:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-02-11 01:09:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:50,443 INFO L225 Difference]: With dead ends: 591 [2022-02-11 01:09:50,443 INFO L226 Difference]: Without dead ends: 581 [2022-02-11 01:09:50,444 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-02-11 01:09:50,444 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:50,444 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-11 01:09:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-02-11 01:09:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 499. [2022-02-11 01:09:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.7730923694779117) internal successors, (883), 498 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 883 transitions. [2022-02-11 01:09:50,450 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 883 transitions. Word has length 31 [2022-02-11 01:09:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:50,451 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 883 transitions. [2022-02-11 01:09:50,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 883 transitions. [2022-02-11 01:09:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:09:50,452 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:50,452 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:50,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:50,674 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,SelfDestructingSolverStorable47 [2022-02-11 01:09:50,674 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1436163393, now seen corresponding path program 46 times [2022-02-11 01:09:50,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:50,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597646843] [2022-02-11 01:09:50,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:50,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:50,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:50,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597646843] [2022-02-11 01:09:50,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597646843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:50,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090367106] [2022-02-11 01:09:50,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:09:50,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:50,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:50,990 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:50,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-11 01:09:51,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:09:51,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:51,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 01:09:51,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:51,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-02-11 01:09:51,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:09:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:51,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:51,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:51,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:09:51,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:51,611 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 30 treesize of output 30 [2022-02-11 01:09:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:51,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090367106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:51,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:51,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:09:51,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284766186] [2022-02-11 01:09:51,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:51,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:09:51,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:09:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:09:51,771 INFO L87 Difference]: Start difference. First operand 499 states and 883 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:09:52,681 INFO L93 Difference]: Finished difference Result 566 states and 986 transitions. [2022-02-11 01:09:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-11 01:09:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:09:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:09:52,682 INFO L225 Difference]: With dead ends: 566 [2022-02-11 01:09:52,682 INFO L226 Difference]: Without dead ends: 555 [2022-02-11 01:09:52,682 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 38 SyntacticMatches, 23 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=2582, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 01:09:52,683 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:09:52,683 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 148 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:09:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-02-11 01:09:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 491. [2022-02-11 01:09:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.7653061224489797) internal successors, (865), 490 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 865 transitions. [2022-02-11 01:09:52,690 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 865 transitions. Word has length 35 [2022-02-11 01:09:52,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:09:52,690 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 865 transitions. [2022-02-11 01:09:52,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:09:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 865 transitions. [2022-02-11 01:09:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:09:52,691 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:09:52,691 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:09:52,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-11 01:09:52,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:52,915 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:09:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:09:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash -842207935, now seen corresponding path program 47 times [2022-02-11 01:09:52,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:09:52,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130896354] [2022-02-11 01:09:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:09:52,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:09:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:09:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:09:53,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:09:53,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130896354] [2022-02-11 01:09:53,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130896354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:09:53,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946242840] [2022-02-11 01:09:53,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:09:53,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:09:53,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:09:53,220 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:09:53,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-11 01:09:53,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:09:53,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:09:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 01:09:53,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:09:53,870 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:09:53,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 45 [2022-02-11 01:09:53,938 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:09:53,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2022-02-11 01:09:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:54,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:09:55,171 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-11 01:09:55,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 164 [2022-02-11 01:09:57,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:09:57,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:09:57,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 174 [2022-02-11 01:09:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:09:58,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946242840] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:09:58,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:09:58,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 23] total 58 [2022-02-11 01:09:58,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341461368] [2022-02-11 01:09:58,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:09:58,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-11 01:09:58,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:09:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-11 01:09:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=3161, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:09:58,095 INFO L87 Difference]: Start difference. First operand 491 states and 865 transitions. Second operand has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:07,406 INFO L93 Difference]: Finished difference Result 1027 states and 1760 transitions. [2022-02-11 01:10:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-11 01:10:07,406 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:10:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:07,409 INFO L225 Difference]: With dead ends: 1027 [2022-02-11 01:10:07,409 INFO L226 Difference]: Without dead ends: 1009 [2022-02-11 01:10:07,411 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11601 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3471, Invalid=29109, Unknown=0, NotChecked=0, Total=32580 [2022-02-11 01:10:07,411 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 305 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 666 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 666 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:07,411 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 181 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [666 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:10:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-02-11 01:10:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 328. [2022-02-11 01:10:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.7400611620795108) internal successors, (569), 327 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 569 transitions. [2022-02-11 01:10:07,419 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 569 transitions. Word has length 35 [2022-02-11 01:10:07,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:07,419 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 569 transitions. [2022-02-11 01:10:07,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:07,419 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 569 transitions. [2022-02-11 01:10:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:07,420 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:07,420 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:07,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:07,643 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,SelfDestructingSolverStorable49 [2022-02-11 01:10:07,643 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1681102881, now seen corresponding path program 48 times [2022-02-11 01:10:07,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:07,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976219295] [2022-02-11 01:10:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:10:07,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:07,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976219295] [2022-02-11 01:10:07,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976219295] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:07,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274012196] [2022-02-11 01:10:07,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:10:07,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:07,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:07,928 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:07,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-11 01:10:07,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:10:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-11 01:10:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:08,709 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:10:08,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 41 [2022-02-11 01:10:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:08,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:08,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:08,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:10:08,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2022-02-11 01:10:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:09,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:11,322 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-11 01:10:11,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 148 [2022-02-11 01:10:14,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:14,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:14,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:14,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:14,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:14,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:14,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:14,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:14,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 144 treesize of output 168 [2022-02-11 01:10:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:10:16,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274012196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:16,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:16,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 55 [2022-02-11 01:10:16,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099621755] [2022-02-11 01:10:16,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:16,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-11 01:10:16,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:16,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-11 01:10:16,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-02-11 01:10:16,734 INFO L87 Difference]: Start difference. First operand 328 states and 569 transitions. Second operand has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:20,069 INFO L93 Difference]: Finished difference Result 526 states and 891 transitions. [2022-02-11 01:10:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 01:10:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:10:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:20,071 INFO L225 Difference]: With dead ends: 526 [2022-02-11 01:10:20,071 INFO L226 Difference]: Without dead ends: 507 [2022-02-11 01:10:20,072 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=935, Invalid=8965, Unknown=0, NotChecked=0, Total=9900 [2022-02-11 01:10:20,072 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 113 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 2537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1178 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:20,073 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 301 Invalid, 2537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1258 Invalid, 0 Unknown, 1178 Unchecked, 0.6s Time] [2022-02-11 01:10:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-11 01:10:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 369. [2022-02-11 01:10:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.7309782608695652) internal successors, (637), 368 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 637 transitions. [2022-02-11 01:10:20,078 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 637 transitions. Word has length 35 [2022-02-11 01:10:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:20,078 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 637 transitions. [2022-02-11 01:10:20,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 55 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 637 transitions. [2022-02-11 01:10:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:20,079 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:20,079 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:20,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:20,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:20,295 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:20,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1945050433, now seen corresponding path program 49 times [2022-02-11 01:10:20,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:20,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671241738] [2022-02-11 01:10:20,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:20,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:20,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:20,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671241738] [2022-02-11 01:10:20,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671241738] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:20,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32641987] [2022-02-11 01:10:20,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:10:20,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:20,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:20,623 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:20,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-11 01:10:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:10:20,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:20,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:20,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:20,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:21,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:21,187 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 36 treesize of output 38 [2022-02-11 01:10:21,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:21,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:10:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:21,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32641987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:21,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:21,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-11 01:10:21,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897390119] [2022-02-11 01:10:21,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:21,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:10:21,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:21,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:10:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:10:21,450 INFO L87 Difference]: Start difference. First operand 369 states and 637 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:22,775 INFO L93 Difference]: Finished difference Result 512 states and 870 transitions. [2022-02-11 01:10:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-11 01:10:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:10:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:22,776 INFO L225 Difference]: With dead ends: 512 [2022-02-11 01:10:22,776 INFO L226 Difference]: Without dead ends: 499 [2022-02-11 01:10:22,776 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=643, Invalid=3913, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:10:22,777 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 203 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:22,777 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 153 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-02-11 01:10:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 413. [2022-02-11 01:10:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.7572815533980584) internal successors, (724), 412 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 724 transitions. [2022-02-11 01:10:22,781 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 724 transitions. Word has length 35 [2022-02-11 01:10:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:22,781 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 724 transitions. [2022-02-11 01:10:22,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 724 transitions. [2022-02-11 01:10:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:22,782 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:22,782 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:22,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:22,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-02-11 01:10:22,982 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:22,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1467851139, now seen corresponding path program 50 times [2022-02-11 01:10:22,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:22,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179192893] [2022-02-11 01:10:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:22,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:23,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:23,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179192893] [2022-02-11 01:10:23,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179192893] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:23,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696976513] [2022-02-11 01:10:23,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:10:23,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:23,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:23,308 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:23,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-11 01:10:23,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:10:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:10:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:23,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:23,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:23,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:23,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:23,806 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 36 treesize of output 38 [2022-02-11 01:10:23,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:23,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:10:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:24,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696976513] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:24,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:24,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-11 01:10:24,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336069085] [2022-02-11 01:10:24,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:24,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:10:24,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:10:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:10:24,077 INFO L87 Difference]: Start difference. First operand 413 states and 724 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:26,201 INFO L93 Difference]: Finished difference Result 639 states and 1074 transitions. [2022-02-11 01:10:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-11 01:10:26,201 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:10:26,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:26,202 INFO L225 Difference]: With dead ends: 639 [2022-02-11 01:10:26,202 INFO L226 Difference]: Without dead ends: 613 [2022-02-11 01:10:26,203 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=998, Invalid=7012, Unknown=0, NotChecked=0, Total=8010 [2022-02-11 01:10:26,203 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 205 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:26,203 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 220 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:10:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-02-11 01:10:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 448. [2022-02-11 01:10:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.7539149888143177) internal successors, (784), 447 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 784 transitions. [2022-02-11 01:10:26,210 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 784 transitions. Word has length 35 [2022-02-11 01:10:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:26,210 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 784 transitions. [2022-02-11 01:10:26,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 784 transitions. [2022-02-11 01:10:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:26,211 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:26,211 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:26,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:26,433 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,SelfDestructingSolverStorable52 [2022-02-11 01:10:26,434 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:26,434 INFO L85 PathProgramCache]: Analyzing trace with hash -880105817, now seen corresponding path program 51 times [2022-02-11 01:10:26,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:26,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629720379] [2022-02-11 01:10:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:26,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:26,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:26,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629720379] [2022-02-11 01:10:26,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629720379] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:26,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281024333] [2022-02-11 01:10:26,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:10:26,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:26,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:26,714 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:26,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-11 01:10:26,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:10:26,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:10:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:26,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:26,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:27,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:27,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:27,208 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 36 treesize of output 38 [2022-02-11 01:10:27,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:27,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:10:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:27,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281024333] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:27,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:27,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-11 01:10:27,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136619902] [2022-02-11 01:10:27,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:27,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:10:27,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:10:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:10:27,485 INFO L87 Difference]: Start difference. First operand 448 states and 784 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:28,893 INFO L93 Difference]: Finished difference Result 974 states and 1619 transitions. [2022-02-11 01:10:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 01:10:28,893 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:10:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:28,894 INFO L225 Difference]: With dead ends: 974 [2022-02-11 01:10:28,894 INFO L226 Difference]: Without dead ends: 951 [2022-02-11 01:10:28,895 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=668, Invalid=4588, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 01:10:28,895 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:28,895 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 158 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-02-11 01:10:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 471. [2022-02-11 01:10:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.7468085106382978) internal successors, (821), 470 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 821 transitions. [2022-02-11 01:10:28,901 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 821 transitions. Word has length 35 [2022-02-11 01:10:28,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:28,901 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 821 transitions. [2022-02-11 01:10:28,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:28,901 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 821 transitions. [2022-02-11 01:10:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:28,902 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:28,902 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:28,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:29,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:29,102 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:29,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:29,103 INFO L85 PathProgramCache]: Analyzing trace with hash -581506077, now seen corresponding path program 52 times [2022-02-11 01:10:29,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:29,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106749433] [2022-02-11 01:10:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:29,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:10:29,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:29,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106749433] [2022-02-11 01:10:29,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106749433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:29,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190789309] [2022-02-11 01:10:29,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:10:29,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:29,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:29,390 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:29,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-11 01:10:29,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:10:29,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:29,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:10:29,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:29,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:29,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:10:29,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:30,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:30,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:10:30,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:30,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:10:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:10:30,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190789309] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:30,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:30,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-11 01:10:30,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141911776] [2022-02-11 01:10:30,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:10:30,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:10:30,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:10:30,302 INFO L87 Difference]: Start difference. First operand 471 states and 821 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:31,367 INFO L93 Difference]: Finished difference Result 1003 states and 1698 transitions. [2022-02-11 01:10:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:10:31,367 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:10:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:31,369 INFO L225 Difference]: With dead ends: 1003 [2022-02-11 01:10:31,369 INFO L226 Difference]: Without dead ends: 990 [2022-02-11 01:10:31,370 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 47 SyntacticMatches, 15 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 01:10:31,370 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:31,370 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 144 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-11 01:10:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 500. [2022-02-11 01:10:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.749498997995992) internal successors, (873), 499 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 873 transitions. [2022-02-11 01:10:31,378 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 873 transitions. Word has length 35 [2022-02-11 01:10:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:31,379 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 873 transitions. [2022-02-11 01:10:31,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 873 transitions. [2022-02-11 01:10:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:31,380 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:31,380 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:31,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-02-11 01:10:31,593 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,SelfDestructingSolverStorable54 [2022-02-11 01:10:31,594 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:31,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1832286487, now seen corresponding path program 53 times [2022-02-11 01:10:31,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:31,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269118363] [2022-02-11 01:10:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:31,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:31,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:31,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269118363] [2022-02-11 01:10:31,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269118363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:31,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024088848] [2022-02-11 01:10:31,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:10:31,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:31,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:31,923 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:31,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-11 01:10:31,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:10:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:10:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:32,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:32,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:32,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:32,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:32,478 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 36 treesize of output 38 [2022-02-11 01:10:32,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:32,543 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 36 treesize of output 38 [2022-02-11 01:10:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:32,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024088848] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:32,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:32,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2022-02-11 01:10:32,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080247093] [2022-02-11 01:10:32,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:32,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-11 01:10:32,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:32,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-11 01:10:32,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2022-02-11 01:10:32,952 INFO L87 Difference]: Start difference. First operand 500 states and 873 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:35,931 INFO L93 Difference]: Finished difference Result 1146 states and 1939 transitions. [2022-02-11 01:10:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-11 01:10:35,932 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:10:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:35,933 INFO L225 Difference]: With dead ends: 1146 [2022-02-11 01:10:35,933 INFO L226 Difference]: Without dead ends: 1130 [2022-02-11 01:10:35,934 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4041 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2069, Invalid=10587, Unknown=0, NotChecked=0, Total=12656 [2022-02-11 01:10:35,934 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 296 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:35,934 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 244 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:10:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-02-11 01:10:35,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 493. [2022-02-11 01:10:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.75) internal successors, (861), 492 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 861 transitions. [2022-02-11 01:10:35,941 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 861 transitions. Word has length 35 [2022-02-11 01:10:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:35,942 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 861 transitions. [2022-02-11 01:10:35,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:35,942 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 861 transitions. [2022-02-11 01:10:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:35,942 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:35,942 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:35,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:36,143 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,SelfDestructingSolverStorable55 [2022-02-11 01:10:36,143 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:36,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1717702913, now seen corresponding path program 54 times [2022-02-11 01:10:36,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:36,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072477802] [2022-02-11 01:10:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:36,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:36,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:36,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072477802] [2022-02-11 01:10:36,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072477802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:36,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807212709] [2022-02-11 01:10:36,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:10:36,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:36,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:36,421 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:36,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-11 01:10:36,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:10:36,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:10:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:36,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:36,710 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 [2022-02-11 01:10:36,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:36,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:37,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:37,063 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 36 treesize of output 38 [2022-02-11 01:10:37,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:37,222 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 28 treesize of output 28 [2022-02-11 01:10:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:37,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807212709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:37,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:37,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-02-11 01:10:37,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791356003] [2022-02-11 01:10:37,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:37,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-11 01:10:37,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:37,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-11 01:10:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1756, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:10:37,565 INFO L87 Difference]: Start difference. First operand 493 states and 861 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:38,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:38,898 INFO L93 Difference]: Finished difference Result 769 states and 1325 transitions. [2022-02-11 01:10:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-11 01:10:38,898 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:10:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:38,899 INFO L225 Difference]: With dead ends: 769 [2022-02-11 01:10:38,899 INFO L226 Difference]: Without dead ends: 758 [2022-02-11 01:10:38,900 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=868, Invalid=5294, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 01:10:38,900 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 366 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:38,900 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 183 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 805 Invalid, 0 Unknown, 111 Unchecked, 0.4s Time] [2022-02-11 01:10:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-02-11 01:10:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 491. [2022-02-11 01:10:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.7469387755102042) internal successors, (856), 490 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 856 transitions. [2022-02-11 01:10:38,906 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 856 transitions. Word has length 35 [2022-02-11 01:10:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:38,906 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 856 transitions. [2022-02-11 01:10:38,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 856 transitions. [2022-02-11 01:10:38,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:38,907 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:38,907 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:38,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-02-11 01:10:39,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:39,107 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:39,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1695198659, now seen corresponding path program 55 times [2022-02-11 01:10:39,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:39,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005161606] [2022-02-11 01:10:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:39,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:39,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005161606] [2022-02-11 01:10:39,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005161606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:39,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588298701] [2022-02-11 01:10:39,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:10:39,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:39,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:39,436 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:39,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-11 01:10:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:39,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:10:39,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:39,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:39,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:39,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:39,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:39,976 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 36 treesize of output 38 [2022-02-11 01:10:40,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:40,106 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 28 treesize of output 28 [2022-02-11 01:10:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:40,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588298701] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:40,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:40,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:10:40,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616430787] [2022-02-11 01:10:40,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:40,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:10:40,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:10:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:10:40,278 INFO L87 Difference]: Start difference. First operand 491 states and 856 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:41,860 INFO L93 Difference]: Finished difference Result 811 states and 1394 transitions. [2022-02-11 01:10:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:10:41,861 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:10:41,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:41,862 INFO L225 Difference]: With dead ends: 811 [2022-02-11 01:10:41,862 INFO L226 Difference]: Without dead ends: 795 [2022-02-11 01:10:41,863 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=730, Invalid=4526, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 01:10:41,863 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 210 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:41,863 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 150 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-11 01:10:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 492. [2022-02-11 01:10:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.7474541751527495) internal successors, (858), 491 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 858 transitions. [2022-02-11 01:10:41,869 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 858 transitions. Word has length 35 [2022-02-11 01:10:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:41,869 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 858 transitions. [2022-02-11 01:10:41,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 858 transitions. [2022-02-11 01:10:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:41,870 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:41,870 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:41,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:42,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:42,071 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:42,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:42,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1107453337, now seen corresponding path program 56 times [2022-02-11 01:10:42,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:42,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331160695] [2022-02-11 01:10:42,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:42,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:42,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:42,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331160695] [2022-02-11 01:10:42,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331160695] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:42,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726733139] [2022-02-11 01:10:42,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:10:42,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:42,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:42,372 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:42,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-11 01:10:42,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:10:42,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:10:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:42,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:42,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:42,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:42,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:42,868 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 36 treesize of output 38 [2022-02-11 01:10:42,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:42,992 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 28 treesize of output 28 [2022-02-11 01:10:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:43,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726733139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:43,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:43,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:10:43,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624971989] [2022-02-11 01:10:43,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:43,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:10:43,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:43,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:10:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:10:43,159 INFO L87 Difference]: Start difference. First operand 492 states and 858 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:44,697 INFO L93 Difference]: Finished difference Result 925 states and 1558 transitions. [2022-02-11 01:10:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:10:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:10:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:44,699 INFO L225 Difference]: With dead ends: 925 [2022-02-11 01:10:44,699 INFO L226 Difference]: Without dead ends: 902 [2022-02-11 01:10:44,699 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=704, Invalid=4996, Unknown=0, NotChecked=0, Total=5700 [2022-02-11 01:10:44,700 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:44,700 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 148 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-02-11 01:10:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 491. [2022-02-11 01:10:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.7469387755102042) internal successors, (856), 490 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 856 transitions. [2022-02-11 01:10:44,705 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 856 transitions. Word has length 35 [2022-02-11 01:10:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:44,705 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 856 transitions. [2022-02-11 01:10:44,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 856 transitions. [2022-02-11 01:10:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:44,706 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:44,707 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:44,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:44,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:44,909 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash 976750815, now seen corresponding path program 57 times [2022-02-11 01:10:44,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:44,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967139112] [2022-02-11 01:10:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:45,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:45,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967139112] [2022-02-11 01:10:45,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967139112] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:45,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434875428] [2022-02-11 01:10:45,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:10:45,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:45,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:45,240 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:45,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-11 01:10:45,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:10:45,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 01:10:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:45,594 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 [2022-02-11 01:10:45,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:45,637 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 [2022-02-11 01:10:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:45,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:46,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:46,036 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 36 treesize of output 38 [2022-02-11 01:10:46,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:46,202 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 28 treesize of output 28 [2022-02-11 01:10:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:46,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434875428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:46,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:46,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-02-11 01:10:46,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241450723] [2022-02-11 01:10:46,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:46,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:10:46,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:46,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:10:46,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1825, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:10:46,557 INFO L87 Difference]: Start difference. First operand 491 states and 856 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:47,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:47,569 INFO L93 Difference]: Finished difference Result 867 states and 1479 transitions. [2022-02-11 01:10:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-11 01:10:47,569 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:10:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:47,570 INFO L225 Difference]: With dead ends: 867 [2022-02-11 01:10:47,570 INFO L226 Difference]: Without dead ends: 856 [2022-02-11 01:10:47,570 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=692, Invalid=4000, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:10:47,571 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 199 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:47,571 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 244 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 822 Invalid, 0 Unknown, 123 Unchecked, 0.4s Time] [2022-02-11 01:10:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-02-11 01:10:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 640. [2022-02-11 01:10:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.727699530516432) internal successors, (1104), 639 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1104 transitions. [2022-02-11 01:10:47,577 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1104 transitions. Word has length 35 [2022-02-11 01:10:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:47,577 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1104 transitions. [2022-02-11 01:10:47,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1104 transitions. [2022-02-11 01:10:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:47,578 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:47,578 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:47,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:47,779 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,SelfDestructingSolverStorable59 [2022-02-11 01:10:47,779 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1858816539, now seen corresponding path program 58 times [2022-02-11 01:10:47,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:47,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257824468] [2022-02-11 01:10:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:47,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:48,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:48,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:48,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257824468] [2022-02-11 01:10:48,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257824468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:48,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655099977] [2022-02-11 01:10:48,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:10:48,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:48,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:48,110 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:48,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-11 01:10:48,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:10:48,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:48,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:10:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:48,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:48,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:48,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:48,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:48,615 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 36 treesize of output 38 [2022-02-11 01:10:48,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:48,747 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 28 treesize of output 28 [2022-02-11 01:10:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:48,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655099977] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:48,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:48,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:10:48,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247609858] [2022-02-11 01:10:48,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:48,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:10:48,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:10:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:10:48,915 INFO L87 Difference]: Start difference. First operand 640 states and 1104 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:50,560 INFO L93 Difference]: Finished difference Result 1379 states and 2294 transitions. [2022-02-11 01:10:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 01:10:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:10:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:50,562 INFO L225 Difference]: With dead ends: 1379 [2022-02-11 01:10:50,562 INFO L226 Difference]: Without dead ends: 1353 [2022-02-11 01:10:50,563 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=792, Invalid=5688, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 01:10:50,563 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 211 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:50,563 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 186 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:10:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2022-02-11 01:10:50,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 659. [2022-02-11 01:10:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.7279635258358663) internal successors, (1137), 658 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1137 transitions. [2022-02-11 01:10:50,572 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1137 transitions. Word has length 35 [2022-02-11 01:10:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:50,572 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 1137 transitions. [2022-02-11 01:10:50,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1137 transitions. [2022-02-11 01:10:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:50,573 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:50,573 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:50,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:50,773 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,SelfDestructingSolverStorable60 [2022-02-11 01:10:50,773 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:50,774 INFO L85 PathProgramCache]: Analyzing trace with hash -560668415, now seen corresponding path program 59 times [2022-02-11 01:10:50,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:50,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506410465] [2022-02-11 01:10:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:50,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:51,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:51,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506410465] [2022-02-11 01:10:51,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506410465] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:51,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930985279] [2022-02-11 01:10:51,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:10:51,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:51,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:51,066 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:51,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-11 01:10:51,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:10:51,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:10:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:51,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:51,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-11 01:10:51,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:51,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:51,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:51,786 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 36 treesize of output 38 [2022-02-11 01:10:51,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:51,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:10:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:52,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930985279] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:10:52,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:10:52,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-02-11 01:10:52,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939305924] [2022-02-11 01:10:52,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:10:52,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-11 01:10:52,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:10:52,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-11 01:10:52,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:10:52,318 INFO L87 Difference]: Start difference. First operand 659 states and 1137 transitions. Second operand has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:10:58,627 INFO L93 Difference]: Finished difference Result 1981 states and 3246 transitions. [2022-02-11 01:10:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-02-11 01:10:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:10:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:10:58,629 INFO L225 Difference]: With dead ends: 1981 [2022-02-11 01:10:58,629 INFO L226 Difference]: Without dead ends: 1961 [2022-02-11 01:10:58,631 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 69 SyntacticMatches, 20 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12901 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4607, Invalid=29803, Unknown=0, NotChecked=0, Total=34410 [2022-02-11 01:10:58,631 INFO L934 BasicCegarLoop]: 29 mSDtfsCounter, 456 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 2365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:10:58,631 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 504 Invalid, 2365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 1378 Invalid, 0 Unknown, 635 Unchecked, 0.7s Time] [2022-02-11 01:10:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-02-11 01:10:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 914. [2022-02-11 01:10:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 1.7207009857612268) internal successors, (1571), 913 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1571 transitions. [2022-02-11 01:10:58,646 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1571 transitions. Word has length 35 [2022-02-11 01:10:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:10:58,646 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 1571 transitions. [2022-02-11 01:10:58,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:10:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1571 transitions. [2022-02-11 01:10:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:10:58,647 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:10:58,647 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:10:58,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-11 01:10:58,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-02-11 01:10:58,863 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:10:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:10:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash 321397309, now seen corresponding path program 60 times [2022-02-11 01:10:58,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:10:58,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001018542] [2022-02-11 01:10:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:10:58,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:10:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:10:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:59,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:10:59,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001018542] [2022-02-11 01:10:59,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001018542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:10:59,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906723460] [2022-02-11 01:10:59,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:10:59,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:10:59,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:10:59,147 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:10:59,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-11 01:10:59,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:10:59,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:10:59,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:10:59,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:10:59,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:10:59,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-11 01:10:59,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:10:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:10:59,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:10:59,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:59,820 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 35 treesize of output 37 [2022-02-11 01:10:59,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:10:59,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:11:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:11:00,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906723460] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:00,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:00,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-02-11 01:11:00,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312244583] [2022-02-11 01:11:00,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:00,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-11 01:11:00,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-11 01:11:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:11:00,341 INFO L87 Difference]: Start difference. First operand 914 states and 1571 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:05,598 INFO L93 Difference]: Finished difference Result 2818 states and 4701 transitions. [2022-02-11 01:11:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-11 01:11:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:05,601 INFO L225 Difference]: With dead ends: 2818 [2022-02-11 01:11:05,601 INFO L226 Difference]: Without dead ends: 2798 [2022-02-11 01:11:05,603 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 64 SyntacticMatches, 26 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10391 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3853, Invalid=23207, Unknown=0, NotChecked=0, Total=27060 [2022-02-11 01:11:05,603 INFO L934 BasicCegarLoop]: 30 mSDtfsCounter, 564 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1027 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:05,603 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 645 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1440 Invalid, 0 Unknown, 1027 Unchecked, 0.7s Time] [2022-02-11 01:11:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-02-11 01:11:05,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1521. [2022-02-11 01:11:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.7223684210526315) internal successors, (2618), 1520 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2618 transitions. [2022-02-11 01:11:05,624 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2618 transitions. Word has length 35 [2022-02-11 01:11:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:05,624 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 2618 transitions. [2022-02-11 01:11:05,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2618 transitions. [2022-02-11 01:11:05,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:05,626 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:05,626 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:05,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:05,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:05,847 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1466592159, now seen corresponding path program 61 times [2022-02-11 01:11:05,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:05,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863555027] [2022-02-11 01:11:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:05,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:11:06,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:06,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863555027] [2022-02-11 01:11:06,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863555027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:06,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191279033] [2022-02-11 01:11:06,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:11:06,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:06,148 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:06,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-11 01:11:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:06,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:06,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:11:06,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:06,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:06,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:11:06,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:06,801 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 30 treesize of output 30 [2022-02-11 01:11:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:11:06,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191279033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:06,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:06,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-02-11 01:11:06,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676836944] [2022-02-11 01:11:06,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:06,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:11:06,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:06,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:11:06,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:11:06,967 INFO L87 Difference]: Start difference. First operand 1521 states and 2618 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:08,278 INFO L93 Difference]: Finished difference Result 2359 states and 4010 transitions. [2022-02-11 01:11:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:11:08,278 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:08,280 INFO L225 Difference]: With dead ends: 2359 [2022-02-11 01:11:08,280 INFO L226 Difference]: Without dead ends: 2344 [2022-02-11 01:11:08,281 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=476, Invalid=4354, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:11:08,281 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:08,281 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 167 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:11:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-02-11 01:11:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 1325. [2022-02-11 01:11:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 1.7175226586102719) internal successors, (2274), 1324 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2274 transitions. [2022-02-11 01:11:08,296 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2274 transitions. Word has length 35 [2022-02-11 01:11:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:08,296 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 2274 transitions. [2022-02-11 01:11:08,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2274 transitions. [2022-02-11 01:11:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:08,298 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:08,298 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:08,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:08,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:08,498 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1393746199, now seen corresponding path program 62 times [2022-02-11 01:11:08,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:08,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784192748] [2022-02-11 01:11:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:08,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:11:08,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:08,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784192748] [2022-02-11 01:11:08,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784192748] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:08,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819479153] [2022-02-11 01:11:08,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:11:08,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:08,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:08,768 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:08,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-11 01:11:08,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:11:08,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:08,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:08,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:11:09,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:09,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:09,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:11:09,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:09,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:11:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-11 01:11:09,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819479153] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:09,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:09,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:11:09,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538826659] [2022-02-11 01:11:09,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:09,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:11:09,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:09,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:11:09,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:11:09,550 INFO L87 Difference]: Start difference. First operand 1325 states and 2274 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:10,764 INFO L93 Difference]: Finished difference Result 1750 states and 2926 transitions. [2022-02-11 01:11:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:11:10,765 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:10,767 INFO L225 Difference]: With dead ends: 1750 [2022-02-11 01:11:10,767 INFO L226 Difference]: Without dead ends: 1734 [2022-02-11 01:11:10,767 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=424, Invalid=3736, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 01:11:10,767 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:10,768 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 162 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:11:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-02-11 01:11:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1144. [2022-02-11 01:11:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1143 states have (on average 1.7147856517935258) internal successors, (1960), 1143 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1960 transitions. [2022-02-11 01:11:10,783 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1960 transitions. Word has length 35 [2022-02-11 01:11:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 1960 transitions. [2022-02-11 01:11:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1960 transitions. [2022-02-11 01:11:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:10,785 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:10,785 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:10,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:11,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-11 01:11:11,007 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:11,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1077070117, now seen corresponding path program 63 times [2022-02-11 01:11:11,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:11,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716413886] [2022-02-11 01:11:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:11,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:11,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:11,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716413886] [2022-02-11 01:11:11,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716413886] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:11,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217327630] [2022-02-11 01:11:11,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:11:11,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:11,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:11,311 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:11,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-11 01:11:11,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:11:11,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:11,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:11,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:11,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:11,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:11,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:11,822 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 36 treesize of output 38 [2022-02-11 01:11:11,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:11,912 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 26 treesize of output 28 [2022-02-11 01:11:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:12,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217327630] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:12,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:12,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:11:12,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051869227] [2022-02-11 01:11:12,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:12,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:11:12,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:12,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:11:12,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:11:12,126 INFO L87 Difference]: Start difference. First operand 1144 states and 1960 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:13,845 INFO L93 Difference]: Finished difference Result 1563 states and 2615 transitions. [2022-02-11 01:11:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 01:11:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:13,847 INFO L225 Difference]: With dead ends: 1563 [2022-02-11 01:11:13,847 INFO L226 Difference]: Without dead ends: 1537 [2022-02-11 01:11:13,848 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=859, Invalid=5621, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 01:11:13,848 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 215 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:13,848 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 114 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:11:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2022-02-11 01:11:13,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 895. [2022-02-11 01:11:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.7024608501118568) internal successors, (1522), 894 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1522 transitions. [2022-02-11 01:11:13,859 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1522 transitions. Word has length 35 [2022-02-11 01:11:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:13,859 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1522 transitions. [2022-02-11 01:11:13,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1522 transitions. [2022-02-11 01:11:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:13,860 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:13,860 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:13,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:14,060 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,SelfDestructingSolverStorable65 [2022-02-11 01:11:14,060 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:14,061 INFO L85 PathProgramCache]: Analyzing trace with hash -489324795, now seen corresponding path program 64 times [2022-02-11 01:11:14,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:14,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120055283] [2022-02-11 01:11:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:14,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:14,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:14,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120055283] [2022-02-11 01:11:14,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120055283] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:14,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477812159] [2022-02-11 01:11:14,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:11:14,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:14,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:14,374 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:14,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-11 01:11:14,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:11:14,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:14,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:14,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:14,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:14,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:14,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:14,893 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 36 treesize of output 38 [2022-02-11 01:11:14,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:14,989 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 26 treesize of output 28 [2022-02-11 01:11:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:15,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477812159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:15,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:15,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:11:15,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626217239] [2022-02-11 01:11:15,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:15,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:11:15,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:11:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:11:15,186 INFO L87 Difference]: Start difference. First operand 895 states and 1522 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:16,414 INFO L93 Difference]: Finished difference Result 1522 states and 2512 transitions. [2022-02-11 01:11:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:11:16,414 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:16,416 INFO L225 Difference]: With dead ends: 1522 [2022-02-11 01:11:16,416 INFO L226 Difference]: Without dead ends: 1499 [2022-02-11 01:11:16,416 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=610, Invalid=3946, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:11:16,416 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:16,417 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 166 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:11:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2022-02-11 01:11:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 715. [2022-02-11 01:11:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.7016806722689075) internal successors, (1215), 714 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1215 transitions. [2022-02-11 01:11:16,425 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1215 transitions. Word has length 35 [2022-02-11 01:11:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:16,425 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1215 transitions. [2022-02-11 01:11:16,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1215 transitions. [2022-02-11 01:11:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:16,426 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:16,426 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:16,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:16,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:16,627 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash -558018303, now seen corresponding path program 65 times [2022-02-11 01:11:16,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:16,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117907541] [2022-02-11 01:11:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:16,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:16,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:16,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117907541] [2022-02-11 01:11:16,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117907541] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:16,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774198553] [2022-02-11 01:11:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:11:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:16,942 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:16,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-11 01:11:16,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:11:16,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:16,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2022-02-11 01:11:16,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:17,657 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:11:17,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 45 [2022-02-11 01:11:17,735 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:11:17,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2022-02-11 01:11:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:17,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:18,979 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-11 01:11:18,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 154 [2022-02-11 01:11:19,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:19,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:19,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 248 [2022-02-11 01:11:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:21,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774198553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:21,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:21,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 57 [2022-02-11 01:11:21,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685863882] [2022-02-11 01:11:21,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:21,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-11 01:11:21,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-11 01:11:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 01:11:22,009 INFO L87 Difference]: Start difference. First operand 715 states and 1215 transitions. Second operand has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 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) [2022-02-11 01:11:33,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:33,344 INFO L93 Difference]: Finished difference Result 1318 states and 2186 transitions. [2022-02-11 01:11:33,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-02-11 01:11:33,345 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 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) Word has length 35 [2022-02-11 01:11:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:33,346 INFO L225 Difference]: With dead ends: 1318 [2022-02-11 01:11:33,346 INFO L226 Difference]: Without dead ends: 1294 [2022-02-11 01:11:33,348 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12957 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3102, Invalid=33954, Unknown=0, NotChecked=0, Total=37056 [2022-02-11 01:11:33,348 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 433 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 3251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:33,348 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 347 Invalid, 3251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 2470 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-11 01:11:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-02-11 01:11:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 764. [2022-02-11 01:11:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 1.6985583224115335) internal successors, (1296), 763 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1296 transitions. [2022-02-11 01:11:33,358 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1296 transitions. Word has length 35 [2022-02-11 01:11:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:33,358 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1296 transitions. [2022-02-11 01:11:33,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 57 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) [2022-02-11 01:11:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1296 transitions. [2022-02-11 01:11:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:33,359 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:33,359 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:33,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-11 01:11:33,560 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,SelfDestructingSolverStorable67 [2022-02-11 01:11:33,560 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1466957033, now seen corresponding path program 66 times [2022-02-11 01:11:33,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:33,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237015517] [2022-02-11 01:11:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:33,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:33,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:33,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237015517] [2022-02-11 01:11:33,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237015517] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:33,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766581236] [2022-02-11 01:11:33,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:11:33,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:33,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:33,899 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:33,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-11 01:11:33,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:11:33,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-11 01:11:33,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:34,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:34,297 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 [2022-02-11 01:11:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:34,365 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 [2022-02-11 01:11:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:34,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:34,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:34,747 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 36 treesize of output 38 [2022-02-11 01:11:34,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:34,908 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 30 treesize of output 30 [2022-02-11 01:11:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:35,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766581236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:35,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:35,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 50 [2022-02-11 01:11:35,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970924125] [2022-02-11 01:11:35,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:35,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-11 01:11:35,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:35,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-11 01:11:35,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 01:11:35,313 INFO L87 Difference]: Start difference. First operand 764 states and 1296 transitions. Second operand has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:38,747 INFO L93 Difference]: Finished difference Result 1489 states and 2454 transitions. [2022-02-11 01:11:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-11 01:11:38,748 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:11:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:38,749 INFO L225 Difference]: With dead ends: 1489 [2022-02-11 01:11:38,749 INFO L226 Difference]: Without dead ends: 1476 [2022-02-11 01:11:38,750 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5075 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2103, Invalid=14153, Unknown=0, NotChecked=0, Total=16256 [2022-02-11 01:11:38,750 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 252 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:38,751 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 191 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 799 Invalid, 0 Unknown, 214 Unchecked, 0.4s Time] [2022-02-11 01:11:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2022-02-11 01:11:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 822. [2022-02-11 01:11:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.7028014616321558) internal successors, (1398), 821 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1398 transitions. [2022-02-11 01:11:38,760 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1398 transitions. Word has length 35 [2022-02-11 01:11:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:38,760 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1398 transitions. [2022-02-11 01:11:38,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 50 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1398 transitions. [2022-02-11 01:11:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:38,761 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:38,761 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:38,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-11 01:11:38,962 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,SelfDestructingSolverStorable68 [2022-02-11 01:11:38,962 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:38,962 INFO L85 PathProgramCache]: Analyzing trace with hash -146609701, now seen corresponding path program 67 times [2022-02-11 01:11:38,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:38,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937819756] [2022-02-11 01:11:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:38,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:39,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:39,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937819756] [2022-02-11 01:11:39,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937819756] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:39,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445208175] [2022-02-11 01:11:39,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:11:39,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:39,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:39,261 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:39,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-11 01:11:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:39,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:39,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:39,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:39,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:39,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:39,812 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 36 treesize of output 38 [2022-02-11 01:11:39,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:39,938 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 30 treesize of output 30 [2022-02-11 01:11:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:40,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445208175] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:40,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:40,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2022-02-11 01:11:40,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998874310] [2022-02-11 01:11:40,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:40,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:11:40,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:11:40,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:11:40,105 INFO L87 Difference]: Start difference. First operand 822 states and 1398 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:41,618 INFO L93 Difference]: Finished difference Result 1422 states and 2355 transitions. [2022-02-11 01:11:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-11 01:11:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:41,620 INFO L225 Difference]: With dead ends: 1422 [2022-02-11 01:11:41,620 INFO L226 Difference]: Without dead ends: 1403 [2022-02-11 01:11:41,621 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=492, Invalid=4620, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 01:11:41,621 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:41,621 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 257 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-11 01:11:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-02-11 01:11:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 740. [2022-02-11 01:11:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.6995940460081191) internal successors, (1256), 739 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1256 transitions. [2022-02-11 01:11:41,628 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1256 transitions. Word has length 35 [2022-02-11 01:11:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:41,629 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1256 transitions. [2022-02-11 01:11:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1256 transitions. [2022-02-11 01:11:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:41,630 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:41,630 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:41,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:41,843 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,SelfDestructingSolverStorable69 [2022-02-11 01:11:41,843 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:41,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2054702355, now seen corresponding path program 68 times [2022-02-11 01:11:41,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:41,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958530054] [2022-02-11 01:11:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:41,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:42,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:42,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958530054] [2022-02-11 01:11:42,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958530054] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:42,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227239498] [2022-02-11 01:11:42,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:11:42,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:42,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:42,165 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:42,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-11 01:11:42,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:11:42,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:42,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:42,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:42,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:42,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:42,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:42,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:42,708 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 36 treesize of output 38 [2022-02-11 01:11:42,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:42,837 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 30 treesize of output 30 [2022-02-11 01:11:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:43,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227239498] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:43,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:43,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:11:43,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347339326] [2022-02-11 01:11:43,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:43,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:11:43,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:11:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:11:43,003 INFO L87 Difference]: Start difference. First operand 740 states and 1256 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:44,380 INFO L93 Difference]: Finished difference Result 1390 states and 2288 transitions. [2022-02-11 01:11:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:11:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:44,382 INFO L225 Difference]: With dead ends: 1390 [2022-02-11 01:11:44,382 INFO L226 Difference]: Without dead ends: 1377 [2022-02-11 01:11:44,382 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=578, Invalid=4824, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 01:11:44,383 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:44,383 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 184 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:11:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-02-11 01:11:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 739. [2022-02-11 01:11:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 1.6978319783197833) internal successors, (1253), 738 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1253 transitions. [2022-02-11 01:11:44,390 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1253 transitions. Word has length 35 [2022-02-11 01:11:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:44,390 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1253 transitions. [2022-02-11 01:11:44,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1253 transitions. [2022-02-11 01:11:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:44,391 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:44,391 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:44,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:44,591 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,SelfDestructingSolverStorable70 [2022-02-11 01:11:44,592 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:44,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1987503899, now seen corresponding path program 69 times [2022-02-11 01:11:44,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:44,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714344388] [2022-02-11 01:11:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:44,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:44,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:44,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714344388] [2022-02-11 01:11:44,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714344388] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:44,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312626406] [2022-02-11 01:11:44,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:11:44,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:44,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:44,907 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:44,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-11 01:11:44,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:11:44,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:44,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:11:44,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:45,210 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 [2022-02-11 01:11:45,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:11:45,241 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 [2022-02-11 01:11:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:45,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:45,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:45,597 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 36 treesize of output 38 [2022-02-11 01:11:45,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:45,759 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 28 treesize of output 28 [2022-02-11 01:11:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:46,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312626406] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:46,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:46,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-02-11 01:11:46,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632945501] [2022-02-11 01:11:46,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:46,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:11:46,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:46,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:11:46,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:11:46,115 INFO L87 Difference]: Start difference. First operand 739 states and 1253 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:48,779 INFO L93 Difference]: Finished difference Result 1274 states and 2107 transitions. [2022-02-11 01:11:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-11 01:11:48,780 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:11:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:48,781 INFO L225 Difference]: With dead ends: 1274 [2022-02-11 01:11:48,781 INFO L226 Difference]: Without dead ends: 1264 [2022-02-11 01:11:48,782 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4302 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2029, Invalid=12013, Unknown=0, NotChecked=0, Total=14042 [2022-02-11 01:11:48,782 INFO L934 BasicCegarLoop]: 24 mSDtfsCounter, 329 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:48,782 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 441 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1190 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-02-11 01:11:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-02-11 01:11:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 719. [2022-02-11 01:11:48,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 1.701949860724234) internal successors, (1222), 718 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1222 transitions. [2022-02-11 01:11:48,789 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1222 transitions. Word has length 35 [2022-02-11 01:11:48,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:48,789 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 1222 transitions. [2022-02-11 01:11:48,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1222 transitions. [2022-02-11 01:11:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:48,790 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:48,790 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:48,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:48,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:48,991 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1700124125, now seen corresponding path program 70 times [2022-02-11 01:11:48,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:48,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015712346] [2022-02-11 01:11:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:49,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:49,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015712346] [2022-02-11 01:11:49,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015712346] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:49,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501724509] [2022-02-11 01:11:49,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:11:49,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:49,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:49,278 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:49,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-11 01:11:49,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:11:49,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:49,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:49,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:49,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:49,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:49,801 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 36 treesize of output 38 [2022-02-11 01:11:49,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:49,931 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 28 treesize of output 28 [2022-02-11 01:11:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:50,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501724509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:50,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:50,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:11:50,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029800472] [2022-02-11 01:11:50,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:50,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:11:50,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:11:50,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:11:50,099 INFO L87 Difference]: Start difference. First operand 719 states and 1222 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:51,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:51,490 INFO L93 Difference]: Finished difference Result 1340 states and 2213 transitions. [2022-02-11 01:11:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:11:51,490 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:51,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:51,492 INFO L225 Difference]: With dead ends: 1340 [2022-02-11 01:11:51,492 INFO L226 Difference]: Without dead ends: 1329 [2022-02-11 01:11:51,492 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=542, Invalid=4570, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 01:11:51,492 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:51,492 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 198 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:11:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-02-11 01:11:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 715. [2022-02-11 01:11:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.6974789915966386) internal successors, (1212), 714 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1212 transitions. [2022-02-11 01:11:51,500 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1212 transitions. Word has length 35 [2022-02-11 01:11:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:51,500 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1212 transitions. [2022-02-11 01:11:51,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1212 transitions. [2022-02-11 01:11:51,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:51,500 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:51,501 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:51,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:51,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:51,702 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:51,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:51,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1298970401, now seen corresponding path program 71 times [2022-02-11 01:11:51,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:51,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666167337] [2022-02-11 01:11:51,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:51,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:52,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:52,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666167337] [2022-02-11 01:11:52,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666167337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:52,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800246229] [2022-02-11 01:11:52,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:11:52,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:52,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:52,049 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:52,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-11 01:11:52,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:11:52,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:52,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:52,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:52,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:52,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:52,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:52,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:11:52,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:52,726 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 30 treesize of output 30 [2022-02-11 01:11:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:52,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800246229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:52,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:52,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:11:52,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735136153] [2022-02-11 01:11:52,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:52,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:11:52,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:52,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:11:52,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:11:52,891 INFO L87 Difference]: Start difference. First operand 715 states and 1212 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:54,075 INFO L93 Difference]: Finished difference Result 1088 states and 1831 transitions. [2022-02-11 01:11:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:11:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:11:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:54,076 INFO L225 Difference]: With dead ends: 1088 [2022-02-11 01:11:54,076 INFO L226 Difference]: Without dead ends: 1077 [2022-02-11 01:11:54,077 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=4039, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:11:54,077 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 191 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:54,077 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 193 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:11:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-02-11 01:11:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 716. [2022-02-11 01:11:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.697902097902098) internal successors, (1214), 715 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1214 transitions. [2022-02-11 01:11:54,084 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1214 transitions. Word has length 35 [2022-02-11 01:11:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:54,084 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1214 transitions. [2022-02-11 01:11:54,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:54,084 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1214 transitions. [2022-02-11 01:11:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:54,085 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:54,085 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:54,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:54,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:54,303 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -416904677, now seen corresponding path program 72 times [2022-02-11 01:11:54,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:54,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270536001] [2022-02-11 01:11:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:54,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:54,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270536001] [2022-02-11 01:11:54,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270536001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:54,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859973240] [2022-02-11 01:11:54,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:11:54,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:54,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:54,624 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:54,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-11 01:11:54,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:11:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:11:54,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:11:54,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:54,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:54,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:54,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:55,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:55,192 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 36 treesize of output 38 [2022-02-11 01:11:55,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:55,339 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 30 treesize of output 30 [2022-02-11 01:11:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:55,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859973240] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:55,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:55,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 35 [2022-02-11 01:11:55,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169775229] [2022-02-11 01:11:55,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:55,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:11:55,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:55,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:11:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:11:55,670 INFO L87 Difference]: Start difference. First operand 716 states and 1214 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) 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) [2022-02-11 01:11:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:11:57,415 INFO L93 Difference]: Finished difference Result 1540 states and 2562 transitions. [2022-02-11 01:11:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-11 01:11:57,415 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) 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) Word has length 35 [2022-02-11 01:11:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:11:57,417 INFO L225 Difference]: With dead ends: 1540 [2022-02-11 01:11:57,417 INFO L226 Difference]: Without dead ends: 1517 [2022-02-11 01:11:57,418 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=987, Invalid=6845, Unknown=0, NotChecked=0, Total=7832 [2022-02-11 01:11:57,418 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 275 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:11:57,418 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 183 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:11:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-02-11 01:11:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 716. [2022-02-11 01:11:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.697902097902098) internal successors, (1214), 715 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:11:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1214 transitions. [2022-02-11 01:11:57,427 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1214 transitions. Word has length 35 [2022-02-11 01:11:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:11:57,427 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1214 transitions. [2022-02-11 01:11:57,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) 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) [2022-02-11 01:11:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1214 transitions. [2022-02-11 01:11:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:11:57,428 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:11:57,428 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:11:57,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-11 01:11:57,628 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,SelfDestructingSolverStorable74 [2022-02-11 01:11:57,628 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:11:57,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:11:57,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1458577665, now seen corresponding path program 73 times [2022-02-11 01:11:57,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:11:57,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791085514] [2022-02-11 01:11:57,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:11:57,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:11:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:57,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:11:57,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791085514] [2022-02-11 01:11:57,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791085514] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:11:57,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026434137] [2022-02-11 01:11:57,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:11:57,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:11:57,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:11:57,962 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:11:57,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-11 01:11:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:11:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:11:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:11:58,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:58,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:11:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:58,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:11:58,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:58,586 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 36 treesize of output 38 [2022-02-11 01:11:58,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:11:58,718 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 28 treesize of output 28 [2022-02-11 01:11:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:11:58,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026434137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:11:58,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:11:58,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:11:58,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997641476] [2022-02-11 01:11:58,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:11:58,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:11:58,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:11:58,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:11:58,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:11:58,886 INFO L87 Difference]: Start difference. First operand 716 states and 1214 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:00,692 INFO L93 Difference]: Finished difference Result 1149 states and 1928 transitions. [2022-02-11 01:12:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:12:00,692 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:00,693 INFO L225 Difference]: With dead ends: 1149 [2022-02-11 01:12:00,693 INFO L226 Difference]: Without dead ends: 1136 [2022-02-11 01:12:00,694 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=895, Invalid=5425, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:12:00,694 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 250 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:00,695 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 183 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:12:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-02-11 01:12:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 717. [2022-02-11 01:12:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.6983240223463687) internal successors, (1216), 716 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1216 transitions. [2022-02-11 01:12:00,708 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1216 transitions. Word has length 35 [2022-02-11 01:12:00,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:00,708 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 1216 transitions. [2022-02-11 01:12:00,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1216 transitions. [2022-02-11 01:12:00,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:00,709 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:00,709 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:00,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:00,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:00,909 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1954323907, now seen corresponding path program 74 times [2022-02-11 01:12:00,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:00,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910819595] [2022-02-11 01:12:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:00,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:01,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:01,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910819595] [2022-02-11 01:12:01,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910819595] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:01,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357461722] [2022-02-11 01:12:01,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:12:01,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:01,188 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:01,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-11 01:12:01,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:12:01,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:01,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:12:01,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:01,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:01,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:01,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:01,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:01,711 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 36 treesize of output 38 [2022-02-11 01:12:01,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:01,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-11 01:12:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:02,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357461722] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:02,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:02,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:12:02,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069449352] [2022-02-11 01:12:02,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:02,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:12:02,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:12:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:12:02,014 INFO L87 Difference]: Start difference. First operand 717 states and 1216 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:03,287 INFO L93 Difference]: Finished difference Result 1029 states and 1732 transitions. [2022-02-11 01:12:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:12:03,288 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:03,289 INFO L225 Difference]: With dead ends: 1029 [2022-02-11 01:12:03,289 INFO L226 Difference]: Without dead ends: 1019 [2022-02-11 01:12:03,289 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 15 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=675, Invalid=3881, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:12:03,290 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 181 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:03,290 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 201 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-02-11 01:12:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 710. [2022-02-11 01:12:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.7009873060648801) internal successors, (1206), 709 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1206 transitions. [2022-02-11 01:12:03,297 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1206 transitions. Word has length 35 [2022-02-11 01:12:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:03,297 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1206 transitions. [2022-02-11 01:12:03,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1206 transitions. [2022-02-11 01:12:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:03,298 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:03,298 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:03,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:03,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:03,498 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2097831233, now seen corresponding path program 75 times [2022-02-11 01:12:03,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:03,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563778733] [2022-02-11 01:12:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:03,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:03,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:03,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563778733] [2022-02-11 01:12:03,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563778733] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:03,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973273025] [2022-02-11 01:12:03,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:12:03,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:03,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:03,771 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:03,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-11 01:12:03,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:12:03,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:03,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:12:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:04,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:04,065 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-11 01:12:04,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:04,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-11 01:12:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:04,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:04,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:04,485 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 36 treesize of output 38 [2022-02-11 01:12:04,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:04,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:12:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:05,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973273025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:05,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:05,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2022-02-11 01:12:05,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316470650] [2022-02-11 01:12:05,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:05,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-11 01:12:05,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:05,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-11 01:12:05,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2022-02-11 01:12:05,082 INFO L87 Difference]: Start difference. First operand 710 states and 1206 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:06,901 INFO L93 Difference]: Finished difference Result 1398 states and 2308 transitions. [2022-02-11 01:12:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-11 01:12:06,901 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:12:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:06,903 INFO L225 Difference]: With dead ends: 1398 [2022-02-11 01:12:06,903 INFO L226 Difference]: Without dead ends: 1389 [2022-02-11 01:12:06,904 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 43 SyntacticMatches, 15 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1441, Invalid=6931, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 01:12:06,904 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 150 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:06,904 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 238 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 716 Invalid, 0 Unknown, 262 Unchecked, 0.3s Time] [2022-02-11 01:12:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-02-11 01:12:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 815. [2022-02-11 01:12:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 1.7137592137592137) internal successors, (1395), 814 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 1395 transitions. [2022-02-11 01:12:06,912 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 1395 transitions. Word has length 35 [2022-02-11 01:12:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:06,912 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 1395 transitions. [2022-02-11 01:12:06,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 1395 transitions. [2022-02-11 01:12:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:06,913 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:06,913 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:06,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-11 01:12:07,113 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,SelfDestructingSolverStorable77 [2022-02-11 01:12:07,114 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:07,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1315070339, now seen corresponding path program 76 times [2022-02-11 01:12:07,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:07,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594642494] [2022-02-11 01:12:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:07,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:07,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:07,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594642494] [2022-02-11 01:12:07,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594642494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:07,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109171359] [2022-02-11 01:12:07,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:12:07,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:07,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:07,381 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:07,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-11 01:12:07,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:12:07,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:07,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:12:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:07,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:07,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:07,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:07,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:07,873 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 36 treesize of output 38 [2022-02-11 01:12:07,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:07,971 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 26 treesize of output 28 [2022-02-11 01:12:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:08,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109171359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:08,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:08,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-11 01:12:08,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642018108] [2022-02-11 01:12:08,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:08,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:12:08,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:12:08,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:12:08,149 INFO L87 Difference]: Start difference. First operand 815 states and 1395 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:10,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:10,121 INFO L93 Difference]: Finished difference Result 1414 states and 2364 transitions. [2022-02-11 01:12:10,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 01:12:10,121 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:10,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:10,122 INFO L225 Difference]: With dead ends: 1414 [2022-02-11 01:12:10,122 INFO L226 Difference]: Without dead ends: 1388 [2022-02-11 01:12:10,123 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 26 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2206 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=965, Invalid=6517, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 01:12:10,123 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 268 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:10,123 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 202 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:12:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-02-11 01:12:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 930. [2022-02-11 01:12:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 1.7351991388589882) internal successors, (1612), 929 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1612 transitions. [2022-02-11 01:12:10,133 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1612 transitions. Word has length 35 [2022-02-11 01:12:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:10,133 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1612 transitions. [2022-02-11 01:12:10,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1612 transitions. [2022-02-11 01:12:10,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:10,134 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:10,134 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:10,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:10,335 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,SelfDestructingSolverStorable78 [2022-02-11 01:12:10,335 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:10,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1609390741, now seen corresponding path program 77 times [2022-02-11 01:12:10,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:10,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085626296] [2022-02-11 01:12:10,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:10,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:10,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:10,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085626296] [2022-02-11 01:12:10,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085626296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:10,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740151683] [2022-02-11 01:12:10,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:12:10,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:10,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:10,600 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:10,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-11 01:12:10,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-11 01:12:10,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:10,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:12:10,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:10,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:10,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:10,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:11,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:11,152 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 36 treesize of output 38 [2022-02-11 01:12:11,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:11,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:12:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:11,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740151683] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:11,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:11,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-02-11 01:12:11,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693806833] [2022-02-11 01:12:11,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:11,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-11 01:12:11,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:11,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-11 01:12:11,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-02-11 01:12:11,553 INFO L87 Difference]: Start difference. First operand 930 states and 1612 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:12,895 INFO L93 Difference]: Finished difference Result 1200 states and 2058 transitions. [2022-02-11 01:12:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:12:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:12,897 INFO L225 Difference]: With dead ends: 1200 [2022-02-11 01:12:12,897 INFO L226 Difference]: Without dead ends: 1187 [2022-02-11 01:12:12,898 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=859, Invalid=5147, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 01:12:12,898 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 226 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:12,898 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 177 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-02-11 01:12:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 929. [2022-02-11 01:12:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.7230603448275863) internal successors, (1599), 928 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1599 transitions. [2022-02-11 01:12:12,907 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1599 transitions. Word has length 35 [2022-02-11 01:12:12,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:12,908 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1599 transitions. [2022-02-11 01:12:12,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:12,908 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1599 transitions. [2022-02-11 01:12:12,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:12,909 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:12,909 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:12,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:13,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:13,109 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:13,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash -727325017, now seen corresponding path program 78 times [2022-02-11 01:12:13,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:13,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105879323] [2022-02-11 01:12:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:13,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:13,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:13,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105879323] [2022-02-11 01:12:13,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105879323] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:13,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157873467] [2022-02-11 01:12:13,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:12:13,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:13,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:13,420 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:13,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-11 01:12:13,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-11 01:12:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:12:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:13,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:13,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:13,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:13,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:13,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:12:14,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:14,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:12:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:14,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157873467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:14,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:14,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-11 01:12:14,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441562121] [2022-02-11 01:12:14,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:14,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:12:14,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:12:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:12:14,251 INFO L87 Difference]: Start difference. First operand 929 states and 1599 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:15,755 INFO L93 Difference]: Finished difference Result 1694 states and 2818 transitions. [2022-02-11 01:12:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:12:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:15,757 INFO L225 Difference]: With dead ends: 1694 [2022-02-11 01:12:15,757 INFO L226 Difference]: Without dead ends: 1671 [2022-02-11 01:12:15,758 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 36 SyntacticMatches, 26 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=733, Invalid=5119, Unknown=0, NotChecked=0, Total=5852 [2022-02-11 01:12:15,758 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 158 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:15,758 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 192 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-02-11 01:12:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1153. [2022-02-11 01:12:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.7065972222222223) internal successors, (1966), 1152 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1966 transitions. [2022-02-11 01:12:15,779 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1966 transitions. Word has length 35 [2022-02-11 01:12:15,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:15,779 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1966 transitions. [2022-02-11 01:12:15,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:15,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1966 transitions. [2022-02-11 01:12:15,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:15,780 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:15,780 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:15,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:15,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:15,981 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1122150351, now seen corresponding path program 79 times [2022-02-11 01:12:15,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:15,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819363984] [2022-02-11 01:12:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:16,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:16,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819363984] [2022-02-11 01:12:16,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819363984] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:16,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503965416] [2022-02-11 01:12:16,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:12:16,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:16,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:16,252 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:16,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-11 01:12:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:12:16,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:16,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:16,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:16,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:16,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:16,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:12:16,813 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:16,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:12:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:12:17,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503965416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:17,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:17,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-11 01:12:17,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118151048] [2022-02-11 01:12:17,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:17,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:12:17,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:12:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:12:17,060 INFO L87 Difference]: Start difference. First operand 1153 states and 1966 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:18,217 INFO L93 Difference]: Finished difference Result 1697 states and 2846 transitions. [2022-02-11 01:12:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:12:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:18,219 INFO L225 Difference]: With dead ends: 1697 [2022-02-11 01:12:18,219 INFO L226 Difference]: Without dead ends: 1688 [2022-02-11 01:12:18,219 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 26 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=598, Invalid=3308, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 01:12:18,219 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:18,220 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 164 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-02-11 01:12:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1160. [2022-02-11 01:12:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 1.7083692838654012) internal successors, (1980), 1159 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1980 transitions. [2022-02-11 01:12:18,231 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1980 transitions. Word has length 35 [2022-02-11 01:12:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:18,231 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 1980 transitions. [2022-02-11 01:12:18,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1980 transitions. [2022-02-11 01:12:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:18,232 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:18,232 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:18,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:18,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-02-11 01:12:18,433 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:18,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash -428725277, now seen corresponding path program 80 times [2022-02-11 01:12:18,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:18,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835824104] [2022-02-11 01:12:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:18,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:18,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835824104] [2022-02-11 01:12:18,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835824104] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:18,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681943905] [2022-02-11 01:12:18,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:12:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:18,740 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:18,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-11 01:12:18,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:12:18,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:18,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:12:18,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:18,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:18,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:19,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:19,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:19,237 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 36 treesize of output 38 [2022-02-11 01:12:19,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:19,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-11 01:12:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:19,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681943905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:19,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:19,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-02-11 01:12:19,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145810016] [2022-02-11 01:12:19,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:19,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-11 01:12:19,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-11 01:12:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-02-11 01:12:19,539 INFO L87 Difference]: Start difference. First operand 1160 states and 1980 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:20,662 INFO L93 Difference]: Finished difference Result 2062 states and 3448 transitions. [2022-02-11 01:12:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:12:20,662 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:20,665 INFO L225 Difference]: With dead ends: 2062 [2022-02-11 01:12:20,665 INFO L226 Difference]: Without dead ends: 2049 [2022-02-11 01:12:20,665 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 26 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=540, Invalid=3366, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 01:12:20,666 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:20,666 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 199 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-02-11 01:12:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1248. [2022-02-11 01:12:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 1.7177225340817963) internal successors, (2142), 1247 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 2142 transitions. [2022-02-11 01:12:20,686 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 2142 transitions. Word has length 35 [2022-02-11 01:12:20,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:20,686 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 2142 transitions. [2022-02-11 01:12:20,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 2142 transitions. [2022-02-11 01:12:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:20,687 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:20,687 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:20,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-11 01:12:20,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:20,888 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:20,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1985067287, now seen corresponding path program 81 times [2022-02-11 01:12:20,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:20,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138253889] [2022-02-11 01:12:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:20,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:21,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:21,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138253889] [2022-02-11 01:12:21,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138253889] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:21,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512746210] [2022-02-11 01:12:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:12:21,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:21,198 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:21,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-11 01:12:21,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:12:21,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:12:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:21,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:21,509 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 [2022-02-11 01:12:21,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:21,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-11 01:12:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:21,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:21,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:21,928 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 36 treesize of output 38 [2022-02-11 01:12:22,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:22,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-11 01:12:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:22,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512746210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:22,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:22,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-02-11 01:12:22,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323055291] [2022-02-11 01:12:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:22,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-11 01:12:22,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-11 01:12:22,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:12:22,548 INFO L87 Difference]: Start difference. First operand 1248 states and 2142 transitions. Second operand has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:25,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:25,610 INFO L93 Difference]: Finished difference Result 2151 states and 3602 transitions. [2022-02-11 01:12:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-11 01:12:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:12:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:25,613 INFO L225 Difference]: With dead ends: 2151 [2022-02-11 01:12:25,613 INFO L226 Difference]: Without dead ends: 2141 [2022-02-11 01:12:25,614 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 41 SyntacticMatches, 10 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2161, Invalid=10049, Unknown=0, NotChecked=0, Total=12210 [2022-02-11 01:12:25,614 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 241 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:25,614 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 214 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 799 Invalid, 0 Unknown, 299 Unchecked, 0.4s Time] [2022-02-11 01:12:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2022-02-11 01:12:25,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1258. [2022-02-11 01:12:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 1.7199681782020684) internal successors, (2162), 1257 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 2162 transitions. [2022-02-11 01:12:25,636 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 2162 transitions. Word has length 35 [2022-02-11 01:12:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:25,636 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 2162 transitions. [2022-02-11 01:12:25,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 2162 transitions. [2022-02-11 01:12:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:25,638 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:25,638 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:25,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-11 01:12:25,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:25,838 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1166990397, now seen corresponding path program 82 times [2022-02-11 01:12:25,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:25,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872218048] [2022-02-11 01:12:25,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:26,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:26,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872218048] [2022-02-11 01:12:26,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872218048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:26,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450912442] [2022-02-11 01:12:26,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:12:26,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:26,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:26,115 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:26,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-11 01:12:26,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:12:26,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:12:26,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:26,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:26,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:12:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:26,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:26,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:26,632 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 36 treesize of output 38 [2022-02-11 01:12:26,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:26,695 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 36 treesize of output 38 [2022-02-11 01:12:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:26,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450912442] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:26,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:26,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:12:26,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159628760] [2022-02-11 01:12:26,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:26,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:12:26,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:26,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:12:26,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:12:26,966 INFO L87 Difference]: Start difference. First operand 1258 states and 2162 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:28,125 INFO L93 Difference]: Finished difference Result 1955 states and 3246 transitions. [2022-02-11 01:12:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:12:28,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:12:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:28,135 INFO L225 Difference]: With dead ends: 1955 [2022-02-11 01:12:28,135 INFO L226 Difference]: Without dead ends: 1939 [2022-02-11 01:12:28,135 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 24 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=502, Invalid=3404, Unknown=0, NotChecked=0, Total=3906 [2022-02-11 01:12:28,136 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:28,136 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 172 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:12:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2022-02-11 01:12:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1271. [2022-02-11 01:12:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1270 states have (on average 1.7188976377952756) internal successors, (2183), 1270 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 2183 transitions. [2022-02-11 01:12:28,156 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 2183 transitions. Word has length 35 [2022-02-11 01:12:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:28,156 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 2183 transitions. [2022-02-11 01:12:28,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 2183 transitions. [2022-02-11 01:12:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:28,159 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:28,159 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:28,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:28,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-02-11 01:12:28,373 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:28,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1244115189, now seen corresponding path program 83 times [2022-02-11 01:12:28,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:28,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557800010] [2022-02-11 01:12:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:28,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:28,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:28,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557800010] [2022-02-11 01:12:28,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557800010] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:28,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042378379] [2022-02-11 01:12:28,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:12:28,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:28,668 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:28,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-11 01:12:28,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:12:28,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-11 01:12:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:29,344 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:12:29,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 43 [2022-02-11 01:12:29,382 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:12:29,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2022-02-11 01:12:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:30,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:30,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:30,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 159 [2022-02-11 01:12:31,554 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-11 01:12:31,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 174 [2022-02-11 01:12:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:32,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042378379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:32,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:32,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 57 [2022-02-11 01:12:32,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366756052] [2022-02-11 01:12:32,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:32,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-11 01:12:32,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-11 01:12:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=3040, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 01:12:32,944 INFO L87 Difference]: Start difference. First operand 1271 states and 2183 transitions. Second operand has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:12:42,010 INFO L93 Difference]: Finished difference Result 2693 states and 4543 transitions. [2022-02-11 01:12:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-11 01:12:42,010 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:12:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:12:42,013 INFO L225 Difference]: With dead ends: 2693 [2022-02-11 01:12:42,013 INFO L226 Difference]: Without dead ends: 2678 [2022-02-11 01:12:42,014 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10555 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=2676, Invalid=27774, Unknown=0, NotChecked=0, Total=30450 [2022-02-11 01:12:42,014 INFO L934 BasicCegarLoop]: 25 mSDtfsCounter, 365 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 3201 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 3201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:12:42,014 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 682 Invalid, 3726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 3201 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 01:12:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2022-02-11 01:12:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 1466. [2022-02-11 01:12:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 1.7276450511945391) internal successors, (2531), 1465 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:42,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2531 transitions. [2022-02-11 01:12:42,031 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2531 transitions. Word has length 35 [2022-02-11 01:12:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:12:42,031 INFO L470 AbstractCegarLoop]: Abstraction has 1466 states and 2531 transitions. [2022-02-11 01:12:42,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:12:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2531 transitions. [2022-02-11 01:12:42,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:12:42,033 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:12:42,033 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:12:42,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-11 01:12:42,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:42,234 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:12:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:12:42,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1777918399, now seen corresponding path program 84 times [2022-02-11 01:12:42,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:12:42,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209650254] [2022-02-11 01:12:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:12:42,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:12:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:12:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:12:42,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:12:42,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209650254] [2022-02-11 01:12:42,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209650254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:12:42,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594890731] [2022-02-11 01:12:42,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:12:42,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:12:42,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:12:42,506 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:12:42,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-11 01:12:42,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:12:42,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:12:42,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 52 conjunts are in the unsatisfiable core [2022-02-11 01:12:42,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:12:43,284 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:12:43,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 47 [2022-02-11 01:12:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:43,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:43,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:43,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:12:43,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 25 [2022-02-11 01:12:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:43,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:12:44,966 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-11 01:12:44,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 158 [2022-02-11 01:12:46,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:12:46,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:12:46,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 150 [2022-02-11 01:12:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:12:47,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594890731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:12:47,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:12:47,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 58 [2022-02-11 01:12:47,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949012102] [2022-02-11 01:12:47,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:12:47,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-11 01:12:47,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:12:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-11 01:12:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3053, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:12:47,163 INFO L87 Difference]: Start difference. First operand 1466 states and 2531 transitions. Second operand has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 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) [2022-02-11 01:13:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:00,178 INFO L93 Difference]: Finished difference Result 3658 states and 6223 transitions. [2022-02-11 01:13:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-11 01:13:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 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) Word has length 35 [2022-02-11 01:13:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:00,182 INFO L225 Difference]: With dead ends: 3658 [2022-02-11 01:13:00,182 INFO L226 Difference]: Without dead ends: 3638 [2022-02-11 01:13:00,184 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15879 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=4529, Invalid=41481, Unknown=0, NotChecked=0, Total=46010 [2022-02-11 01:13:00,184 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 244 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 4497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1299 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:00,184 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 377 Invalid, 4497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2895 Invalid, 0 Unknown, 1299 Unchecked, 1.3s Time] [2022-02-11 01:13:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2022-02-11 01:13:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2688. [2022-02-11 01:13:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 1.7413472273911426) internal successors, (4679), 2687 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 4679 transitions. [2022-02-11 01:13:00,209 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 4679 transitions. Word has length 35 [2022-02-11 01:13:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:00,210 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 4679 transitions. [2022-02-11 01:13:00,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 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) [2022-02-11 01:13:00,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 4679 transitions. [2022-02-11 01:13:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:00,212 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:00,212 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:00,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:00,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:00,413 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 979629667, now seen corresponding path program 85 times [2022-02-11 01:13:00,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:00,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489020561] [2022-02-11 01:13:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:00,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:00,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:00,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489020561] [2022-02-11 01:13:00,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489020561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:00,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048994267] [2022-02-11 01:13:00,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:00,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:00,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:00,686 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:00,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-11 01:13:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:13:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:00,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:00,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:00,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:01,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:01,203 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 36 treesize of output 38 [2022-02-11 01:13:01,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:01,261 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 36 treesize of output 38 [2022-02-11 01:13:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:01,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048994267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:01,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:01,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:13:01,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113661404] [2022-02-11 01:13:01,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:01,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:13:01,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:01,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:13:01,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:13:01,518 INFO L87 Difference]: Start difference. First operand 2688 states and 4679 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:02,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:02,754 INFO L93 Difference]: Finished difference Result 3558 states and 6114 transitions. [2022-02-11 01:13:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:13:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:13:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:02,758 INFO L225 Difference]: With dead ends: 3558 [2022-02-11 01:13:02,758 INFO L226 Difference]: Without dead ends: 3542 [2022-02-11 01:13:02,758 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=602, Invalid=3558, Unknown=0, NotChecked=0, Total=4160 [2022-02-11 01:13:02,759 INFO L934 BasicCegarLoop]: 16 mSDtfsCounter, 252 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:02,759 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 190 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2022-02-11 01:13:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 1027. [2022-02-11 01:13:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 1.736842105263158) internal successors, (1782), 1026 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1782 transitions. [2022-02-11 01:13:02,776 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1782 transitions. Word has length 35 [2022-02-11 01:13:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:02,776 INFO L470 AbstractCegarLoop]: Abstraction has 1027 states and 1782 transitions. [2022-02-11 01:13:02,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1782 transitions. [2022-02-11 01:13:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:02,778 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:02,778 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:02,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-02-11 01:13:02,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-11 01:13:02,978 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:02,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1240425543, now seen corresponding path program 86 times [2022-02-11 01:13:02,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:02,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644136368] [2022-02-11 01:13:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:03,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:03,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644136368] [2022-02-11 01:13:03,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644136368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:03,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607952999] [2022-02-11 01:13:03,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:03,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:03,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:03,254 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:03,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-11 01:13:03,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:03,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:13:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:03,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:03,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:03,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:03,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:03,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:13:03,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:03,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:13:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:04,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607952999] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:04,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:04,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:13:04,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912257725] [2022-02-11 01:13:04,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:04,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:13:04,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:04,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:13:04,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:13:04,061 INFO L87 Difference]: Start difference. First operand 1027 states and 1782 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:05,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:05,083 INFO L93 Difference]: Finished difference Result 1593 states and 2690 transitions. [2022-02-11 01:13:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-11 01:13:05,084 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:13:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:05,085 INFO L225 Difference]: With dead ends: 1593 [2022-02-11 01:13:05,085 INFO L226 Difference]: Without dead ends: 1583 [2022-02-11 01:13:05,086 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=564, Invalid=3468, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 01:13:05,086 INFO L934 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:05,086 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 195 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:05,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-02-11 01:13:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 968. [2022-02-11 01:13:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 1.7300930713547054) internal successors, (1673), 967 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1673 transitions. [2022-02-11 01:13:05,096 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1673 transitions. Word has length 35 [2022-02-11 01:13:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:05,097 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1673 transitions. [2022-02-11 01:13:05,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1673 transitions. [2022-02-11 01:13:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:05,098 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:05,098 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:05,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-02-11 01:13:05,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:05,298 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:05,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1517122523, now seen corresponding path program 87 times [2022-02-11 01:13:05,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:05,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210150370] [2022-02-11 01:13:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:05,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:05,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:05,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210150370] [2022-02-11 01:13:05,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210150370] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:05,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033750808] [2022-02-11 01:13:05,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:05,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:05,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:05,563 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:05,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-11 01:13:05,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:13:05,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:13:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:05,845 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 [2022-02-11 01:13:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:05,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-11 01:13:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:05,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:06,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:06,258 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 36 treesize of output 38 [2022-02-11 01:13:06,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:06,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:13:06,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:06,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033750808] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:06,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:06,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-02-11 01:13:06,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640151420] [2022-02-11 01:13:06,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:06,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-11 01:13:06,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-11 01:13:06,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2022-02-11 01:13:06,757 INFO L87 Difference]: Start difference. First operand 968 states and 1673 transitions. Second operand has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:08,915 INFO L93 Difference]: Finished difference Result 1706 states and 2857 transitions. [2022-02-11 01:13:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-11 01:13:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:13:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:08,917 INFO L225 Difference]: With dead ends: 1706 [2022-02-11 01:13:08,917 INFO L226 Difference]: Without dead ends: 1696 [2022-02-11 01:13:08,917 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1587, Invalid=8115, Unknown=0, NotChecked=0, Total=9702 [2022-02-11 01:13:08,918 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 415 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:08,918 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 330 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 798 Invalid, 0 Unknown, 319 Unchecked, 0.5s Time] [2022-02-11 01:13:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-02-11 01:13:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 918. [2022-02-11 01:13:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 1.7328244274809161) internal successors, (1589), 917 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1589 transitions. [2022-02-11 01:13:08,931 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1589 transitions. Word has length 35 [2022-02-11 01:13:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:08,931 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1589 transitions. [2022-02-11 01:13:08,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.851063829787234) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1589 transitions. [2022-02-11 01:13:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:08,933 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:08,933 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:08,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:09,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:09,154 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:09,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:09,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1870483713, now seen corresponding path program 88 times [2022-02-11 01:13:09,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:09,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408507305] [2022-02-11 01:13:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:09,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:09,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:09,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408507305] [2022-02-11 01:13:09,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408507305] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:09,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122733646] [2022-02-11 01:13:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:09,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:09,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:09,424 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:09,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-11 01:13:09,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:09,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:09,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:13:09,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:09,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:09,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:09,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:09,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:09,936 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 36 treesize of output 38 [2022-02-11 01:13:10,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:10,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-11 01:13:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:10,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122733646] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:10,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:10,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:13:10,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829044849] [2022-02-11 01:13:10,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:10,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:13:10,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:13:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:13:10,257 INFO L87 Difference]: Start difference. First operand 918 states and 1589 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:11,582 INFO L93 Difference]: Finished difference Result 1372 states and 2329 transitions. [2022-02-11 01:13:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:13:11,583 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:13:11,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:11,584 INFO L225 Difference]: With dead ends: 1372 [2022-02-11 01:13:11,584 INFO L226 Difference]: Without dead ends: 1361 [2022-02-11 01:13:11,585 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=704, Invalid=4126, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:13:11,585 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:11,585 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 224 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:13:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-02-11 01:13:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 926. [2022-02-11 01:13:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.731891891891892) internal successors, (1602), 925 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1602 transitions. [2022-02-11 01:13:11,595 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1602 transitions. Word has length 35 [2022-02-11 01:13:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:11,595 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1602 transitions. [2022-02-11 01:13:11,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1602 transitions. [2022-02-11 01:13:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:11,596 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:11,596 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:11,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:11,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:11,797 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1542417859, now seen corresponding path program 89 times [2022-02-11 01:13:11,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:11,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465489378] [2022-02-11 01:13:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:11,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:12,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:12,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465489378] [2022-02-11 01:13:12,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465489378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:12,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392129193] [2022-02-11 01:13:12,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:12,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:12,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:12,071 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:12,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-11 01:13:12,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:13:12,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:12,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-11 01:13:12,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:12,720 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:13:12,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 39 [2022-02-11 01:13:12,795 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:13:12,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 19 [2022-02-11 01:13:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:12,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:14,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:14,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 159 [2022-02-11 01:13:15,299 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-11 01:13:15,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 188 treesize of output 178 [2022-02-11 01:13:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:17,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392129193] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:17,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:17,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 58 [2022-02-11 01:13:17,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607590916] [2022-02-11 01:13:17,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:17,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-11 01:13:17,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-11 01:13:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3192, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:13:17,340 INFO L87 Difference]: Start difference. First operand 926 states and 1602 transitions. Second operand has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:23,983 INFO L93 Difference]: Finished difference Result 1704 states and 2857 transitions. [2022-02-11 01:13:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-11 01:13:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:13:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:23,985 INFO L225 Difference]: With dead ends: 1704 [2022-02-11 01:13:23,985 INFO L226 Difference]: Without dead ends: 1685 [2022-02-11 01:13:23,986 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7764 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2131, Invalid=21739, Unknown=0, NotChecked=0, Total=23870 [2022-02-11 01:13:23,986 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 288 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:23,986 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 340 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-11 01:13:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-02-11 01:13:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 925. [2022-02-11 01:13:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 1.7305194805194806) internal successors, (1599), 924 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1599 transitions. [2022-02-11 01:13:23,995 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1599 transitions. Word has length 35 [2022-02-11 01:13:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:23,996 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 1599 transitions. [2022-02-11 01:13:23,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 58 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1599 transitions. [2022-02-11 01:13:23,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:23,997 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:23,997 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:24,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:24,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-02-11 01:13:24,197 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:24,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:24,197 INFO L85 PathProgramCache]: Analyzing trace with hash -954672537, now seen corresponding path program 90 times [2022-02-11 01:13:24,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:24,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371816185] [2022-02-11 01:13:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:24,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:24,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:24,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371816185] [2022-02-11 01:13:24,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371816185] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:24,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768961685] [2022-02-11 01:13:24,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:13:24,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:24,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:24,466 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:24,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-11 01:13:24,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:13:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:24,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2022-02-11 01:13:24,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:25,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:13:25,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:13:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:13:25,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 48 [2022-02-11 01:13:25,243 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:13:25,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 22 [2022-02-11 01:13:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:25,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:26,821 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-11 01:13:26,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 160 [2022-02-11 01:13:28,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:28,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:28,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 221 [2022-02-11 01:13:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:30,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768961685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:30,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:30,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 58 [2022-02-11 01:13:30,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402172302] [2022-02-11 01:13:30,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:30,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-11 01:13:30,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-11 01:13:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2022-02-11 01:13:30,173 INFO L87 Difference]: Start difference. First operand 925 states and 1599 transitions. Second operand has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 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) [2022-02-11 01:13:34,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:34,897 INFO L93 Difference]: Finished difference Result 1506 states and 2581 transitions. [2022-02-11 01:13:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-11 01:13:34,897 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 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) Word has length 35 [2022-02-11 01:13:34,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:34,898 INFO L225 Difference]: With dead ends: 1506 [2022-02-11 01:13:34,899 INFO L226 Difference]: Without dead ends: 1477 [2022-02-11 01:13:34,899 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4886 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1439, Invalid=15331, Unknown=0, NotChecked=0, Total=16770 [2022-02-11 01:13:34,900 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 268 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 3303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1258 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:34,900 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 451 Invalid, 3303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1884 Invalid, 0 Unknown, 1258 Unchecked, 0.8s Time] [2022-02-11 01:13:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2022-02-11 01:13:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1013. [2022-02-11 01:13:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 1.7292490118577075) internal successors, (1750), 1012 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1750 transitions. [2022-02-11 01:13:34,910 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1750 transitions. Word has length 35 [2022-02-11 01:13:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:34,910 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1750 transitions. [2022-02-11 01:13:34,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 58 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) [2022-02-11 01:13:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1750 transitions. [2022-02-11 01:13:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:34,911 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:34,911 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:34,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:35,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:35,112 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 121038619, now seen corresponding path program 91 times [2022-02-11 01:13:35,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:35,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939180957] [2022-02-11 01:13:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:35,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:35,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:35,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939180957] [2022-02-11 01:13:35,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939180957] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:35,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036726962] [2022-02-11 01:13:35,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:35,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:35,382 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:35,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-11 01:13:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:35,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:13:35,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:35,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:35,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:35,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:35,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:35,879 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 36 treesize of output 38 [2022-02-11 01:13:36,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:36,005 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 30 treesize of output 30 [2022-02-11 01:13:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:36,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036726962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:36,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:36,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:13:36,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549948421] [2022-02-11 01:13:36,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:36,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:13:36,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:13:36,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:13:36,173 INFO L87 Difference]: Start difference. First operand 1013 states and 1750 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:37,336 INFO L93 Difference]: Finished difference Result 1481 states and 2520 transitions. [2022-02-11 01:13:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-11 01:13:37,336 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:13:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:37,338 INFO L225 Difference]: With dead ends: 1481 [2022-02-11 01:13:37,338 INFO L226 Difference]: Without dead ends: 1468 [2022-02-11 01:13:37,338 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=4039, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:13:37,338 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 183 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:37,338 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 228 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-02-11 01:13:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 923. [2022-02-11 01:13:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.729934924078091) internal successors, (1595), 922 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1595 transitions. [2022-02-11 01:13:37,348 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1595 transitions. Word has length 35 [2022-02-11 01:13:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:37,348 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1595 transitions. [2022-02-11 01:13:37,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1595 transitions. [2022-02-11 01:13:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:37,349 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:37,349 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:37,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:37,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:37,571 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1129531615, now seen corresponding path program 92 times [2022-02-11 01:13:37,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:37,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879165592] [2022-02-11 01:13:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:37,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:37,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:37,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879165592] [2022-02-11 01:13:37,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879165592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:37,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076016461] [2022-02-11 01:13:37,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:37,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:37,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:37,848 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:37,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-11 01:13:37,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:37,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:13:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:38,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:38,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:38,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:38,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:38,354 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 36 treesize of output 38 [2022-02-11 01:13:38,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:38,487 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 28 treesize of output 28 [2022-02-11 01:13:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:38,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076016461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:38,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:38,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:13:38,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070915517] [2022-02-11 01:13:38,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:38,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:13:38,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:38,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:13:38,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:13:38,661 INFO L87 Difference]: Start difference. First operand 923 states and 1595 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:39,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:39,821 INFO L93 Difference]: Finished difference Result 1325 states and 2248 transitions. [2022-02-11 01:13:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:13:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:13:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:39,823 INFO L225 Difference]: With dead ends: 1325 [2022-02-11 01:13:39,823 INFO L226 Difference]: Without dead ends: 1305 [2022-02-11 01:13:39,824 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=610, Invalid=3812, Unknown=0, NotChecked=0, Total=4422 [2022-02-11 01:13:39,824 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:39,824 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 256 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2022-02-11 01:13:39,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 944. [2022-02-11 01:13:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 1.730646871686108) internal successors, (1632), 943 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1632 transitions. [2022-02-11 01:13:39,837 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1632 transitions. Word has length 35 [2022-02-11 01:13:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:39,837 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1632 transitions. [2022-02-11 01:13:39,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1632 transitions. [2022-02-11 01:13:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:39,838 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:39,838 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:39,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-11 01:13:40,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:40,049 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2011597339, now seen corresponding path program 93 times [2022-02-11 01:13:40,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:40,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553482353] [2022-02-11 01:13:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:40,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:40,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:40,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553482353] [2022-02-11 01:13:40,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553482353] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:40,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045909575] [2022-02-11 01:13:40,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:13:40,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:40,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:40,325 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:40,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-11 01:13:40,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:13:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:40,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-11 01:13:40,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:40,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:40,661 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 [2022-02-11 01:13:40,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:40,692 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 [2022-02-11 01:13:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:40,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:41,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:41,055 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 36 treesize of output 38 [2022-02-11 01:13:41,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:41,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:13:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:41,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045909575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:41,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:41,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-02-11 01:13:41,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199033439] [2022-02-11 01:13:41,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:41,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:13:41,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:13:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1745, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:13:41,653 INFO L87 Difference]: Start difference. First operand 944 states and 1632 transitions. Second operand has 46 states, 46 states have (on average 1.8695652173913044) 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) [2022-02-11 01:13:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:44,596 INFO L93 Difference]: Finished difference Result 2597 states and 4345 transitions. [2022-02-11 01:13:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-11 01:13:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8695652173913044) 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) Word has length 35 [2022-02-11 01:13:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:44,599 INFO L225 Difference]: With dead ends: 2597 [2022-02-11 01:13:44,599 INFO L226 Difference]: Without dead ends: 2584 [2022-02-11 01:13:44,600 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 59 SyntacticMatches, 14 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5297 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2671, Invalid=12581, Unknown=0, NotChecked=0, Total=15252 [2022-02-11 01:13:44,600 INFO L934 BasicCegarLoop]: 27 mSDtfsCounter, 464 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:44,600 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 420 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1006 Invalid, 0 Unknown, 514 Unchecked, 0.5s Time] [2022-02-11 01:13:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-02-11 01:13:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1360. [2022-02-11 01:13:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 1.7468727005150846) internal successors, (2374), 1359 states have internal predecessors, (2374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2374 transitions. [2022-02-11 01:13:44,615 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2374 transitions. Word has length 35 [2022-02-11 01:13:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:44,615 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2374 transitions. [2022-02-11 01:13:44,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.8695652173913044) 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) [2022-02-11 01:13:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2374 transitions. [2022-02-11 01:13:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:44,616 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:44,616 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:44,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:44,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:44,817 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:44,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash -407887615, now seen corresponding path program 94 times [2022-02-11 01:13:44,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:44,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894322321] [2022-02-11 01:13:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:44,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:45,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:45,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894322321] [2022-02-11 01:13:45,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894322321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:45,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920189584] [2022-02-11 01:13:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:13:45,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:45,091 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:45,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-11 01:13:45,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:13:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:45,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:13:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:45,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:45,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:45,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:45,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:45,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:13:45,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:45,717 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 30 treesize of output 30 [2022-02-11 01:13:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:45,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920189584] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:45,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:45,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:13:45,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109314122] [2022-02-11 01:13:45,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:45,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:13:45,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:13:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:13:45,883 INFO L87 Difference]: Start difference. First operand 1360 states and 2374 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:48,139 INFO L93 Difference]: Finished difference Result 2446 states and 4129 transitions. [2022-02-11 01:13:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-11 01:13:48,140 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:13:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:48,142 INFO L225 Difference]: With dead ends: 2446 [2022-02-11 01:13:48,142 INFO L226 Difference]: Without dead ends: 2424 [2022-02-11 01:13:48,143 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2859 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1179, Invalid=8327, Unknown=0, NotChecked=0, Total=9506 [2022-02-11 01:13:48,143 INFO L934 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:48,144 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 288 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:13:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-02-11 01:13:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1432. [2022-02-11 01:13:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 1.748427672955975) internal successors, (2502), 1431 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:48,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2502 transitions. [2022-02-11 01:13:48,158 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2502 transitions. Word has length 35 [2022-02-11 01:13:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:48,158 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2502 transitions. [2022-02-11 01:13:48,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2502 transitions. [2022-02-11 01:13:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:48,159 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:48,159 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:48,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-11 01:13:48,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-11 01:13:48,360 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash 474178109, now seen corresponding path program 95 times [2022-02-11 01:13:48,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:48,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061178179] [2022-02-11 01:13:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:48,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:48,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061178179] [2022-02-11 01:13:48,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061178179] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:48,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016738643] [2022-02-11 01:13:48,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:13:48,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:48,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:48,677 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:48,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-11 01:13:48,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:13:48,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-11 01:13:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:48,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:48,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:48,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:49,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:49,205 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 36 treesize of output 38 [2022-02-11 01:13:49,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:49,333 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 30 treesize of output 30 [2022-02-11 01:13:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:13:49,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016738643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:49,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:49,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 35 [2022-02-11 01:13:49,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302440934] [2022-02-11 01:13:49,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:49,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:13:49,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:13:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:13:49,620 INFO L87 Difference]: Start difference. First operand 1432 states and 2502 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:51,189 INFO L93 Difference]: Finished difference Result 1894 states and 3248 transitions. [2022-02-11 01:13:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:13:51,189 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:13:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:51,191 INFO L225 Difference]: With dead ends: 1894 [2022-02-11 01:13:51,191 INFO L226 Difference]: Without dead ends: 1884 [2022-02-11 01:13:51,192 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 37 SyntacticMatches, 17 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=883, Invalid=5923, Unknown=0, NotChecked=0, Total=6806 [2022-02-11 01:13:51,192 INFO L934 BasicCegarLoop]: 21 mSDtfsCounter, 233 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:51,192 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 270 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:13:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-02-11 01:13:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1429. [2022-02-11 01:13:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 1.7478991596638656) internal successors, (2496), 1428 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 2496 transitions. [2022-02-11 01:13:51,205 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 2496 transitions. Word has length 35 [2022-02-11 01:13:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:51,205 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 2496 transitions. [2022-02-11 01:13:51,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 2496 transitions. [2022-02-11 01:13:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:51,207 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:51,207 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:51,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:51,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-02-11 01:13:51,408 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:51,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1619372959, now seen corresponding path program 96 times [2022-02-11 01:13:51,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:51,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955617964] [2022-02-11 01:13:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:51,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:51,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:51,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955617964] [2022-02-11 01:13:51,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955617964] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:51,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869964052] [2022-02-11 01:13:51,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:13:51,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:51,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:51,655 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:51,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-11 01:13:51,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:13:51,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:51,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:13:51,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:51,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:13:51,999 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 [2022-02-11 01:13:52,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:52,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:52,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:52,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:13:52,570 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:52,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:13:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:13:52,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869964052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:52,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:52,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-02-11 01:13:52,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702976096] [2022-02-11 01:13:52,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:52,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:13:52,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:13:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:13:52,922 INFO L87 Difference]: Start difference. First operand 1429 states and 2496 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:56,122 INFO L93 Difference]: Finished difference Result 2746 states and 4680 transitions. [2022-02-11 01:13:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-11 01:13:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:13:56,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:56,125 INFO L225 Difference]: With dead ends: 2746 [2022-02-11 01:13:56,125 INFO L226 Difference]: Without dead ends: 2733 [2022-02-11 01:13:56,126 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4545 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1642, Invalid=13120, Unknown=0, NotChecked=0, Total=14762 [2022-02-11 01:13:56,126 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 203 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 553 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:56,126 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 285 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 706 Invalid, 0 Unknown, 553 Unchecked, 0.4s Time] [2022-02-11 01:13:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-02-11 01:13:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1796. [2022-02-11 01:13:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 1.777158774373259) internal successors, (3190), 1795 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 3190 transitions. [2022-02-11 01:13:56,145 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 3190 transitions. Word has length 35 [2022-02-11 01:13:56,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:56,145 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 3190 transitions. [2022-02-11 01:13:56,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 3190 transitions. [2022-02-11 01:13:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:56,148 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:56,148 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:56,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-11 01:13:56,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:56,349 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash 476828221, now seen corresponding path program 97 times [2022-02-11 01:13:56,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:56,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190742856] [2022-02-11 01:13:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:13:56,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:56,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190742856] [2022-02-11 01:13:56,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190742856] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:56,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991609194] [2022-02-11 01:13:56,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:13:56,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:56,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:56,617 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:56,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-11 01:13:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:56,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 01:13:56,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:56,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-02-11 01:13:56,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:13:56,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:13:57,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:57,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:13:57,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:13:57,275 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 30 treesize of output 30 [2022-02-11 01:13:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:13:57,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991609194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:13:57,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:13:57,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:13:57,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421530828] [2022-02-11 01:13:57,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:13:57,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:13:57,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:13:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:13:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:13:57,441 INFO L87 Difference]: Start difference. First operand 1796 states and 3190 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:59,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:13:59,038 INFO L93 Difference]: Finished difference Result 3169 states and 5451 transitions. [2022-02-11 01:13:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 01:13:59,038 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:13:59,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:13:59,041 INFO L225 Difference]: With dead ends: 3169 [2022-02-11 01:13:59,041 INFO L226 Difference]: Without dead ends: 3143 [2022-02-11 01:13:59,042 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 25 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=772, Invalid=4340, Unknown=0, NotChecked=0, Total=5112 [2022-02-11 01:13:59,042 INFO L934 BasicCegarLoop]: 17 mSDtfsCounter, 219 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:13:59,042 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 274 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:13:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2022-02-11 01:13:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 1883. [2022-02-11 01:13:59,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 1.781615302869288) internal successors, (3353), 1882 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 3353 transitions. [2022-02-11 01:13:59,064 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 3353 transitions. Word has length 35 [2022-02-11 01:13:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:13:59,064 INFO L470 AbstractCegarLoop]: Abstraction has 1883 states and 3353 transitions. [2022-02-11 01:13:59,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:13:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 3353 transitions. [2022-02-11 01:13:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:13:59,066 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:13:59,066 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:13:59,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-11 01:13:59,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:59,267 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:13:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:13:59,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1064573543, now seen corresponding path program 98 times [2022-02-11 01:13:59,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:13:59,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248349607] [2022-02-11 01:13:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:13:59,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:13:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:13:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:13:59,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:13:59,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248349607] [2022-02-11 01:13:59,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248349607] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:13:59,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414427428] [2022-02-11 01:13:59,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:13:59,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:13:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:13:59,523 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:13:59,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-11 01:13:59,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:13:59,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:13:59,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:13:59,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:13:59,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:59,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:13:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:13:59,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:00,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:00,031 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 36 treesize of output 38 [2022-02-11 01:14:00,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:00,163 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 30 treesize of output 30 [2022-02-11 01:14:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:00,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414427428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:00,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:00,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:14:00,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528566752] [2022-02-11 01:14:00,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:00,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:14:00,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:00,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:14:00,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:14:00,323 INFO L87 Difference]: Start difference. First operand 1883 states and 3353 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:01,696 INFO L93 Difference]: Finished difference Result 3065 states and 5281 transitions. [2022-02-11 01:14:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-11 01:14:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:14:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:01,700 INFO L225 Difference]: With dead ends: 3065 [2022-02-11 01:14:01,700 INFO L226 Difference]: Without dead ends: 3019 [2022-02-11 01:14:01,700 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 36 SyntacticMatches, 25 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=704, Invalid=4552, Unknown=0, NotChecked=0, Total=5256 [2022-02-11 01:14:01,701 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 178 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:01,701 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 208 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:14:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2022-02-11 01:14:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 1873. [2022-02-11 01:14:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7751068376068375) internal successors, (3323), 1872 states have internal predecessors, (3323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3323 transitions. [2022-02-11 01:14:01,729 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3323 transitions. Word has length 35 [2022-02-11 01:14:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:01,729 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3323 transitions. [2022-02-11 01:14:01,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3323 transitions. [2022-02-11 01:14:01,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:14:01,730 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:01,731 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:01,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:01,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-11 01:14:01,931 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:01,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1146189601, now seen corresponding path program 99 times [2022-02-11 01:14:01,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:01,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259523909] [2022-02-11 01:14:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:02,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:02,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259523909] [2022-02-11 01:14:02,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259523909] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:02,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60502364] [2022-02-11 01:14:02,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:14:02,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:02,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:02,214 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:02,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-11 01:14:02,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-11 01:14:02,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:02,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:14:02,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:02,530 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 [2022-02-11 01:14:02,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:02,564 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 [2022-02-11 01:14:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:02,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:02,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:02,908 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 36 treesize of output 38 [2022-02-11 01:14:03,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:03,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:14:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:03,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60502364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:03,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:03,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-02-11 01:14:03,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070031459] [2022-02-11 01:14:03,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:03,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-11 01:14:03,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:03,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-11 01:14:03,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2022-02-11 01:14:03,410 INFO L87 Difference]: Start difference. First operand 1873 states and 3323 transitions. Second operand has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:06,809 INFO L93 Difference]: Finished difference Result 3224 states and 5523 transitions. [2022-02-11 01:14:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-11 01:14:06,809 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:14:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:06,812 INFO L225 Difference]: With dead ends: 3224 [2022-02-11 01:14:06,813 INFO L226 Difference]: Without dead ends: 3215 [2022-02-11 01:14:06,813 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 47 SyntacticMatches, 16 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4839 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2142, Invalid=12620, Unknown=0, NotChecked=0, Total=14762 [2022-02-11 01:14:06,813 INFO L934 BasicCegarLoop]: 23 mSDtfsCounter, 367 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:06,813 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 395 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 987 Invalid, 0 Unknown, 573 Unchecked, 0.4s Time] [2022-02-11 01:14:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-02-11 01:14:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 1905. [2022-02-11 01:14:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 1.7746848739495797) internal successors, (3379), 1904 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 3379 transitions. [2022-02-11 01:14:06,833 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 3379 transitions. Word has length 35 [2022-02-11 01:14:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:06,833 INFO L470 AbstractCegarLoop]: Abstraction has 1905 states and 3379 transitions. [2022-02-11 01:14:06,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 3379 transitions. [2022-02-11 01:14:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:14:06,835 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:06,835 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:06,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:07,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:07,037 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:07,037 INFO L85 PathProgramCache]: Analyzing trace with hash -70478445, now seen corresponding path program 100 times [2022-02-11 01:14:07,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:07,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592028838] [2022-02-11 01:14:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:07,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:07,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:07,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592028838] [2022-02-11 01:14:07,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592028838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:07,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615750844] [2022-02-11 01:14:07,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:14:07,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:07,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:07,291 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:07,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-11 01:14:07,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:14:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 01:14:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:07,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:07,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-02-11 01:14:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:07,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:07,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:07,804 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 36 treesize of output 38 [2022-02-11 01:14:07,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:07,934 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 28 treesize of output 28 [2022-02-11 01:14:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:08,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615750844] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:08,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:08,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2022-02-11 01:14:08,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637429568] [2022-02-11 01:14:08,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:08,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:14:08,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:14:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:14:08,093 INFO L87 Difference]: Start difference. First operand 1905 states and 3379 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:09,397 INFO L93 Difference]: Finished difference Result 2887 states and 4984 transitions. [2022-02-11 01:14:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:14:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:14:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:09,400 INFO L225 Difference]: With dead ends: 2887 [2022-02-11 01:14:09,400 INFO L226 Difference]: Without dead ends: 2865 [2022-02-11 01:14:09,401 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 25 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=648, Invalid=4044, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:14:09,401 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 154 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:09,401 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 169 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:14:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2022-02-11 01:14:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 1963. [2022-02-11 01:14:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 1.7757390417940877) internal successors, (3484), 1962 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 3484 transitions. [2022-02-11 01:14:09,421 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 3484 transitions. Word has length 35 [2022-02-11 01:14:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:09,421 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 3484 transitions. [2022-02-11 01:14:09,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 3484 transitions. [2022-02-11 01:14:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:14:09,422 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:09,423 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:09,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-02-11 01:14:09,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-11 01:14:09,623 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1300751397, now seen corresponding path program 101 times [2022-02-11 01:14:09,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:09,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844222609] [2022-02-11 01:14:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:09,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:09,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844222609] [2022-02-11 01:14:09,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844222609] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:09,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171696456] [2022-02-11 01:14:09,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:14:09,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:09,891 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:09,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-11 01:14:09,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:14:09,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:09,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 60 conjunts are in the unsatisfiable core [2022-02-11 01:14:09,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:10,534 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:14:10,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 50 [2022-02-11 01:14:10,624 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:14:10,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 24 [2022-02-11 01:14:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:10,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:11,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:11,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:11,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 144 [2022-02-11 01:14:12,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:12,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:12,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 225 treesize of output 219 [2022-02-11 01:14:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:13,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171696456] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:13,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:13,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 56 [2022-02-11 01:14:13,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55882461] [2022-02-11 01:14:13,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:13,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-11 01:14:13,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:13,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-11 01:14:13,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2022-02-11 01:14:13,349 INFO L87 Difference]: Start difference. First operand 1963 states and 3484 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 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) [2022-02-11 01:14:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:21,250 INFO L93 Difference]: Finished difference Result 2460 states and 4273 transitions. [2022-02-11 01:14:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-11 01:14:21,250 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 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) Word has length 35 [2022-02-11 01:14:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:21,253 INFO L225 Difference]: With dead ends: 2460 [2022-02-11 01:14:21,253 INFO L226 Difference]: Without dead ends: 2429 [2022-02-11 01:14:21,254 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6805 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1833, Invalid=20219, Unknown=0, NotChecked=0, Total=22052 [2022-02-11 01:14:21,254 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 260 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 3407 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 3407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:21,254 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 404 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 3407 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-11 01:14:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2022-02-11 01:14:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1568. [2022-02-11 01:14:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 1.751754945756222) internal successors, (2745), 1567 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2745 transitions. [2022-02-11 01:14:21,270 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2745 transitions. Word has length 35 [2022-02-11 01:14:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:21,270 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 2745 transitions. [2022-02-11 01:14:21,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 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) [2022-02-11 01:14:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2745 transitions. [2022-02-11 01:14:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:14:21,271 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:21,271 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:21,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:21,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-11 01:14:21,472 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1851671161, now seen corresponding path program 102 times [2022-02-11 01:14:21,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:21,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102764927] [2022-02-11 01:14:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:21,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:21,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:21,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102764927] [2022-02-11 01:14:21,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102764927] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:21,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929730894] [2022-02-11 01:14:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:14:21,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:21,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:21,793 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:21,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-11 01:14:21,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-11 01:14:21,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:21,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2022-02-11 01:14:21,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:22,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:22,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:14:22,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2022-02-11 01:14:22,722 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-02-11 01:14:22,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2022-02-11 01:14:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:22,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:24,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:24,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:24,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:24,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:24,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:24,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:24,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:24,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:24,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 98 treesize of output 152 [2022-02-11 01:14:25,708 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-11 01:14:25,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 131 treesize of output 173 [2022-02-11 01:14:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:14:27,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929730894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:27,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:27,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 57 [2022-02-11 01:14:27,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086651446] [2022-02-11 01:14:27,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:27,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-11 01:14:27,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:27,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-11 01:14:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=3003, Unknown=0, NotChecked=0, Total=3306 [2022-02-11 01:14:27,404 INFO L87 Difference]: Start difference. First operand 1568 states and 2745 transitions. Second operand has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:32,690 INFO L93 Difference]: Finished difference Result 2030 states and 3491 transitions. [2022-02-11 01:14:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-11 01:14:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:14:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:32,692 INFO L225 Difference]: With dead ends: 2030 [2022-02-11 01:14:32,692 INFO L226 Difference]: Without dead ends: 2020 [2022-02-11 01:14:32,693 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4366 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1675, Invalid=14581, Unknown=0, NotChecked=0, Total=16256 [2022-02-11 01:14:32,693 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 210 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1533 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:32,693 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 234 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1061 Invalid, 0 Unknown, 1533 Unchecked, 0.5s Time] [2022-02-11 01:14:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-02-11 01:14:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1571. [2022-02-11 01:14:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 1.7535031847133757) internal successors, (2753), 1570 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 2753 transitions. [2022-02-11 01:14:32,708 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 2753 transitions. Word has length 35 [2022-02-11 01:14:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:32,708 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 2753 transitions. [2022-02-11 01:14:32,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5517241379310345) internal successors, (90), 57 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 2753 transitions. [2022-02-11 01:14:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:14:32,709 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:32,709 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:32,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-02-11 01:14:32,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-02-11 01:14:32,910 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1300386523, now seen corresponding path program 103 times [2022-02-11 01:14:32,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:32,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865864540] [2022-02-11 01:14:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:32,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:33,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:33,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865864540] [2022-02-11 01:14:33,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865864540] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:33,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141218567] [2022-02-11 01:14:33,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:14:33,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:33,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:33,185 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:33,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-11 01:14:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:33,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-11 01:14:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:33,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-02-11 01:14:33,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:33,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:33,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:33,715 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 36 treesize of output 38 [2022-02-11 01:14:33,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:33,839 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 30 treesize of output 30 [2022-02-11 01:14:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:33,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141218567] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:33,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:33,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:14:33,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623928262] [2022-02-11 01:14:33,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:33,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:14:33,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:33,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:14:34,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:14:34,000 INFO L87 Difference]: Start difference. First operand 1571 states and 2753 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:35,742 INFO L93 Difference]: Finished difference Result 2696 states and 4581 transitions. [2022-02-11 01:14:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:14:35,742 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:14:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:35,745 INFO L225 Difference]: With dead ends: 2696 [2022-02-11 01:14:35,745 INFO L226 Difference]: Without dead ends: 2680 [2022-02-11 01:14:35,745 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=700, Invalid=5620, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:14:35,746 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 144 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:35,746 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 167 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:14:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2022-02-11 01:14:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1820. [2022-02-11 01:14:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 1.7465640461792193) internal successors, (3177), 1819 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 3177 transitions. [2022-02-11 01:14:35,764 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 3177 transitions. Word has length 35 [2022-02-11 01:14:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:35,764 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 3177 transitions. [2022-02-11 01:14:35,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 3177 transitions. [2022-02-11 01:14:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:14:35,766 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:35,766 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:35,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-11 01:14:35,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:35,967 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1855550813, now seen corresponding path program 104 times [2022-02-11 01:14:35,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:35,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942425673] [2022-02-11 01:14:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:36,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:36,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942425673] [2022-02-11 01:14:36,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942425673] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:36,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993124788] [2022-02-11 01:14:36,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:14:36,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:36,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:36,264 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:36,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-11 01:14:36,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:14:36,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-11 01:14:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:36,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:36,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:36,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:36,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:36,797 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 36 treesize of output 38 [2022-02-11 01:14:36,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:36,923 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 30 treesize of output 30 [2022-02-11 01:14:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:37,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993124788] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:37,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:37,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:14:37,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011543696] [2022-02-11 01:14:37,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:37,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:14:37,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:14:37,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:14:37,084 INFO L87 Difference]: Start difference. First operand 1820 states and 3177 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:38,714 INFO L93 Difference]: Finished difference Result 3271 states and 5529 transitions. [2022-02-11 01:14:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-11 01:14:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-11 01:14:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:38,718 INFO L225 Difference]: With dead ends: 3271 [2022-02-11 01:14:38,718 INFO L226 Difference]: Without dead ends: 3248 [2022-02-11 01:14:38,718 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 47 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=765, Invalid=5555, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:14:38,718 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 165 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:38,719 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 171 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:14:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2022-02-11 01:14:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 1812. [2022-02-11 01:14:38,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 1.7415792379900608) internal successors, (3154), 1811 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3154 transitions. [2022-02-11 01:14:38,738 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3154 transitions. Word has length 35 [2022-02-11 01:14:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:38,738 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 3154 transitions. [2022-02-11 01:14:38,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3154 transitions. [2022-02-11 01:14:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-11 01:14:38,739 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:38,739 INFO L515 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:38,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-11 01:14:38,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:38,940 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1304364495, now seen corresponding path program 105 times [2022-02-11 01:14:38,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:38,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830311426] [2022-02-11 01:14:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:38,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:39,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:39,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830311426] [2022-02-11 01:14:39,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830311426] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:39,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752790114] [2022-02-11 01:14:39,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:14:39,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:39,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:39,228 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:39,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-11 01:14:39,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:14:39,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:39,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-11 01:14:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:39,562 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 [2022-02-11 01:14:39,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:39,595 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 [2022-02-11 01:14:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:39,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:39,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:39,959 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 36 treesize of output 38 [2022-02-11 01:14:40,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:40,137 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 24 treesize of output 26 [2022-02-11 01:14:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:40,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752790114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:40,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:40,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-02-11 01:14:40,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037076587] [2022-02-11 01:14:40,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:40,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:14:40,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:40,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:14:40,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:14:40,472 INFO L87 Difference]: Start difference. First operand 1812 states and 3154 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:44,029 INFO L93 Difference]: Finished difference Result 4026 states and 6841 transitions. [2022-02-11 01:14:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-11 01:14:44,029 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:14:44,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:44,033 INFO L225 Difference]: With dead ends: 4026 [2022-02-11 01:14:44,033 INFO L226 Difference]: Without dead ends: 4009 [2022-02-11 01:14:44,034 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 52 SyntacticMatches, 28 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2484, Invalid=11796, Unknown=0, NotChecked=0, Total=14280 [2022-02-11 01:14:44,035 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 432 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 714 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:44,035 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 287 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 847 Invalid, 0 Unknown, 714 Unchecked, 0.5s Time] [2022-02-11 01:14:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4009 states. [2022-02-11 01:14:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4009 to 2680. [2022-02-11 01:14:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2679 states have (on average 1.7487868607689436) internal successors, (4685), 2679 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 4685 transitions. [2022-02-11 01:14:44,065 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 4685 transitions. Word has length 35 [2022-02-11 01:14:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:44,065 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 4685 transitions. [2022-02-11 01:14:44,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 4685 transitions. [2022-02-11 01:14:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:14:44,067 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:44,067 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:44,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:44,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-11 01:14:44,268 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:44,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1475233081, now seen corresponding path program 106 times [2022-02-11 01:14:44,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:44,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089959439] [2022-02-11 01:14:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:44,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:14:44,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:44,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089959439] [2022-02-11 01:14:44,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089959439] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:44,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388872158] [2022-02-11 01:14:44,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:14:44,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:44,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:44,556 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:44,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-11 01:14:44,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:14:44,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:14:44,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:44,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:44,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:14:44,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:45,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:45,124 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:14:45,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:45,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:14:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:14:45,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388872158] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:45,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:45,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:14:45,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219365135] [2022-02-11 01:14:45,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:45,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:14:45,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:14:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:14:45,469 INFO L87 Difference]: Start difference. First operand 2680 states and 4685 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:47,424 INFO L93 Difference]: Finished difference Result 4274 states and 7252 transitions. [2022-02-11 01:14:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-11 01:14:47,424 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:14:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:47,429 INFO L225 Difference]: With dead ends: 4274 [2022-02-11 01:14:47,429 INFO L226 Difference]: Without dead ends: 4263 [2022-02-11 01:14:47,430 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 60 SyntacticMatches, 20 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=934, Invalid=6548, Unknown=0, NotChecked=0, Total=7482 [2022-02-11 01:14:47,430 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 186 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:47,430 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 137 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:14:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2022-02-11 01:14:47,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 2270. [2022-02-11 01:14:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 1.748788012340238) internal successors, (3968), 2269 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3968 transitions. [2022-02-11 01:14:47,457 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3968 transitions. Word has length 43 [2022-02-11 01:14:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:47,457 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 3968 transitions. [2022-02-11 01:14:47,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3968 transitions. [2022-02-11 01:14:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:14:47,459 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:47,459 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:47,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:47,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:47,660 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash -593167357, now seen corresponding path program 107 times [2022-02-11 01:14:47,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:47,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170347411] [2022-02-11 01:14:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:47,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:14:47,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:47,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170347411] [2022-02-11 01:14:47,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170347411] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:47,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825422621] [2022-02-11 01:14:47,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:14:47,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:47,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:47,958 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:47,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-11 01:14:47,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-11 01:14:47,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-11 01:14:47,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:48,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:48,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:48,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:48,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:48,541 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 36 treesize of output 38 [2022-02-11 01:14:48,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:48,670 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 30 treesize of output 30 [2022-02-11 01:14:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:14:48,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825422621] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:48,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:48,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 35 [2022-02-11 01:14:48,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131209411] [2022-02-11 01:14:48,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:48,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-11 01:14:48,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-11 01:14:48,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-02-11 01:14:48,986 INFO L87 Difference]: Start difference. First operand 2270 states and 3968 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) 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) [2022-02-11 01:14:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:49,897 INFO L93 Difference]: Finished difference Result 2483 states and 4302 transitions. [2022-02-11 01:14:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-11 01:14:49,898 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) 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) Word has length 43 [2022-02-11 01:14:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:49,901 INFO L225 Difference]: With dead ends: 2483 [2022-02-11 01:14:49,901 INFO L226 Difference]: Without dead ends: 2473 [2022-02-11 01:14:49,901 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 16 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=564, Invalid=2976, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 01:14:49,901 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 229 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:49,901 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 149 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:14:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-02-11 01:14:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1986. [2022-02-11 01:14:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.7566750629722923) internal successors, (3487), 1985 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3487 transitions. [2022-02-11 01:14:49,921 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3487 transitions. Word has length 43 [2022-02-11 01:14:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:49,921 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3487 transitions. [2022-02-11 01:14:49,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) 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) [2022-02-11 01:14:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3487 transitions. [2022-02-11 01:14:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:14:49,923 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:49,923 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:49,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-11 01:14:50,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:50,123 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:50,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash -590517245, now seen corresponding path program 108 times [2022-02-11 01:14:50,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:50,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544883167] [2022-02-11 01:14:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:50,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:50,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:50,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544883167] [2022-02-11 01:14:50,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544883167] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:50,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605616563] [2022-02-11 01:14:50,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:14:50,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:50,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:50,472 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:50,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-11 01:14:50,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:14:50,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:50,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 01:14:50,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:50,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:14:50,875 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 [2022-02-11 01:14:50,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 01:14:50,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:51,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:51,217 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 36 treesize of output 38 [2022-02-11 01:14:51,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:51,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:14:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 01:14:51,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605616563] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:51,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:51,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 44 [2022-02-11 01:14:51,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443306732] [2022-02-11 01:14:51,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:51,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-11 01:14:51,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-11 01:14:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1735, Unknown=0, NotChecked=0, Total=1980 [2022-02-11 01:14:51,839 INFO L87 Difference]: Start difference. First operand 1986 states and 3487 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:53,795 INFO L93 Difference]: Finished difference Result 3052 states and 5232 transitions. [2022-02-11 01:14:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-11 01:14:53,795 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:14:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:53,799 INFO L225 Difference]: With dead ends: 3052 [2022-02-11 01:14:53,799 INFO L226 Difference]: Without dead ends: 3039 [2022-02-11 01:14:53,800 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 16 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1316, Invalid=8386, Unknown=0, NotChecked=0, Total=9702 [2022-02-11 01:14:53,800 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 385 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:53,800 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 201 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 691 Invalid, 0 Unknown, 248 Unchecked, 0.4s Time] [2022-02-11 01:14:53,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2022-02-11 01:14:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1976. [2022-02-11 01:14:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 1.749367088607595) internal successors, (3455), 1975 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 3455 transitions. [2022-02-11 01:14:53,824 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 3455 transitions. Word has length 43 [2022-02-11 01:14:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:53,824 INFO L470 AbstractCegarLoop]: Abstraction has 1976 states and 3455 transitions. [2022-02-11 01:14:53,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 3455 transitions. [2022-02-11 01:14:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:14:53,826 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:53,826 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:53,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:54,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:54,027 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:54,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:54,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2771923, now seen corresponding path program 109 times [2022-02-11 01:14:54,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:54,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461140143] [2022-02-11 01:14:54,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:54,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-11 01:14:54,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:54,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461140143] [2022-02-11 01:14:54,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461140143] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:54,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483786430] [2022-02-11 01:14:54,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:14:54,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:54,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:54,359 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:54,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-11 01:14:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:14:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:54,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:54,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 01:14:54,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:54,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:54,948 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 36 treesize of output 38 [2022-02-11 01:14:55,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:55,074 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 30 treesize of output 30 [2022-02-11 01:14:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-11 01:14:55,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483786430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:55,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:55,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 33 [2022-02-11 01:14:55,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826179585] [2022-02-11 01:14:55,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:55,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-11 01:14:55,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-11 01:14:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2022-02-11 01:14:55,316 INFO L87 Difference]: Start difference. First operand 1976 states and 3455 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:56,912 INFO L93 Difference]: Finished difference Result 3635 states and 6124 transitions. [2022-02-11 01:14:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-11 01:14:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:14:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:56,917 INFO L225 Difference]: With dead ends: 3635 [2022-02-11 01:14:56,917 INFO L226 Difference]: Without dead ends: 3615 [2022-02-11 01:14:56,918 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 55 SyntacticMatches, 21 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=881, Invalid=6429, Unknown=0, NotChecked=0, Total=7310 [2022-02-11 01:14:56,918 INFO L934 BasicCegarLoop]: 15 mSDtfsCounter, 150 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:56,918 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 200 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:14:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2022-02-11 01:14:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 1874. [2022-02-11 01:14:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1873 states have (on average 1.7501334757074212) internal successors, (3278), 1873 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 3278 transitions. [2022-02-11 01:14:56,938 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 3278 transitions. Word has length 43 [2022-02-11 01:14:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:56,938 INFO L470 AbstractCegarLoop]: Abstraction has 1874 states and 3278 transitions. [2022-02-11 01:14:56,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 3278 transitions. [2022-02-11 01:14:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:14:56,940 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:56,940 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:56,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-11 01:14:57,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-11 01:14:57,141 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:57,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1319802169, now seen corresponding path program 110 times [2022-02-11 01:14:57,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:57,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445701096] [2022-02-11 01:14:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:57,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:14:57,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:57,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445701096] [2022-02-11 01:14:57,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445701096] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:57,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955951965] [2022-02-11 01:14:57,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:14:57,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:57,451 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:57,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-11 01:14:57,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:14:57,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:57,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:14:57,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:14:57,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:57,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:14:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:14:57,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:14:58,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:58,018 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 36 treesize of output 38 [2022-02-11 01:14:58,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:14:58,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:14:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-11 01:14:58,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955951965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:14:58,358 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:14:58,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:14:58,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410797464] [2022-02-11 01:14:58,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:14:58,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:14:58,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:14:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:14:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:14:58,359 INFO L87 Difference]: Start difference. First operand 1874 states and 3278 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:14:59,277 INFO L93 Difference]: Finished difference Result 1947 states and 3386 transitions. [2022-02-11 01:14:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-11 01:14:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:14:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:14:59,280 INFO L225 Difference]: With dead ends: 1947 [2022-02-11 01:14:59,280 INFO L226 Difference]: Without dead ends: 1934 [2022-02-11 01:14:59,280 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 33 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2022-02-11 01:14:59,280 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:14:59,280 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 190 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:14:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2022-02-11 01:14:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 387. [2022-02-11 01:14:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.7357512953367875) internal successors, (670), 386 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 670 transitions. [2022-02-11 01:14:59,288 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 670 transitions. Word has length 43 [2022-02-11 01:14:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:14:59,288 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 670 transitions. [2022-02-11 01:14:59,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:14:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 670 transitions. [2022-02-11 01:14:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:14:59,289 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:14:59,289 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:14:59,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-11 01:14:59,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-11 01:14:59,489 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:14:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:14:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1752931971, now seen corresponding path program 111 times [2022-02-11 01:14:59,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:14:59,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440739154] [2022-02-11 01:14:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:14:59,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:14:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:14:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:14:59,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:14:59,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440739154] [2022-02-11 01:14:59,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440739154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:14:59,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987449692] [2022-02-11 01:14:59,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:14:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:14:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:14:59,785 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:14:59,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-11 01:14:59,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-11 01:14:59,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:14:59,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-11 01:14:59,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:00,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:00,147 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 [2022-02-11 01:15:00,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:00,182 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 [2022-02-11 01:15:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:15:00,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:00,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:00,532 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 36 treesize of output 38 [2022-02-11 01:15:00,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:00,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2022-02-11 01:15:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:15:01,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987449692] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:01,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:01,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 45 [2022-02-11 01:15:01,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400606369] [2022-02-11 01:15:01,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:01,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-11 01:15:01,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-11 01:15:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1752, Unknown=0, NotChecked=0, Total=2070 [2022-02-11 01:15:01,224 INFO L87 Difference]: Start difference. First operand 387 states and 670 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:05,502 INFO L93 Difference]: Finished difference Result 1818 states and 3019 transitions. [2022-02-11 01:15:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-11 01:15:05,502 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:15:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:05,504 INFO L225 Difference]: With dead ends: 1818 [2022-02-11 01:15:05,504 INFO L226 Difference]: Without dead ends: 1800 [2022-02-11 01:15:05,505 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 91 SyntacticMatches, 28 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 8832 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4245, Invalid=19935, Unknown=0, NotChecked=0, Total=24180 [2022-02-11 01:15:05,505 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 382 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 589 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:05,505 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 235 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 838 Invalid, 0 Unknown, 589 Unchecked, 0.5s Time] [2022-02-11 01:15:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-02-11 01:15:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 532. [2022-02-11 01:15:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.734463276836158) internal successors, (921), 531 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 921 transitions. [2022-02-11 01:15:05,512 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 921 transitions. Word has length 43 [2022-02-11 01:15:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:05,512 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 921 transitions. [2022-02-11 01:15:05,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 921 transitions. [2022-02-11 01:15:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:15:05,513 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:05,513 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:05,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-11 01:15:05,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-11 01:15:05,714 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:05,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:05,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1466324169, now seen corresponding path program 112 times [2022-02-11 01:15:05,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:05,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72022078] [2022-02-11 01:15:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:05,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:05,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:15:06,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:06,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72022078] [2022-02-11 01:15:06,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72022078] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:06,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596916628] [2022-02-11 01:15:06,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:15:06,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:06,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:06,042 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:06,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-11 01:15:06,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:15:06,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:15:06,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:06,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:06,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:15:06,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:06,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:06,595 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 36 treesize of output 38 [2022-02-11 01:15:06,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:06,733 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 30 treesize of output 30 [2022-02-11 01:15:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-11 01:15:06,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596916628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:06,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:06,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:15:06,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948985081] [2022-02-11 01:15:06,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:06,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:15:06,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:15:06,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:15:06,948 INFO L87 Difference]: Start difference. First operand 532 states and 921 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:08,473 INFO L93 Difference]: Finished difference Result 1320 states and 2186 transitions. [2022-02-11 01:15:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-11 01:15:08,473 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:15:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:08,475 INFO L225 Difference]: With dead ends: 1320 [2022-02-11 01:15:08,475 INFO L226 Difference]: Without dead ends: 1300 [2022-02-11 01:15:08,475 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 57 SyntacticMatches, 23 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=747, Invalid=5415, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 01:15:08,475 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 143 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:08,476 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 149 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:15:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-02-11 01:15:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 302. [2022-02-11 01:15:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.744186046511628) internal successors, (525), 301 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 525 transitions. [2022-02-11 01:15:08,482 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 525 transitions. Word has length 43 [2022-02-11 01:15:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:08,482 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 525 transitions. [2022-02-11 01:15:08,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 525 transitions. [2022-02-11 01:15:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:15:08,483 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:08,483 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:08,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:08,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-11 01:15:08,687 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash -770004281, now seen corresponding path program 113 times [2022-02-11 01:15:08,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:08,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286580524] [2022-02-11 01:15:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:09,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:09,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286580524] [2022-02-11 01:15:09,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286580524] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:09,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021244317] [2022-02-11 01:15:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:15:09,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:09,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:09,045 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:09,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-11 01:15:09,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:15:09,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:09,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-11 01:15:09,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:09,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:09,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:09,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:09,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:09,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:15:09,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:09,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:15:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:10,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021244317] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:10,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:10,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 38 [2022-02-11 01:15:10,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801025745] [2022-02-11 01:15:10,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:10,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-11 01:15:10,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:10,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-11 01:15:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2022-02-11 01:15:10,189 INFO L87 Difference]: Start difference. First operand 302 states and 525 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:11,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:11,825 INFO L93 Difference]: Finished difference Result 611 states and 1038 transitions. [2022-02-11 01:15:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-11 01:15:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:15:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:11,826 INFO L225 Difference]: With dead ends: 611 [2022-02-11 01:15:11,826 INFO L226 Difference]: Without dead ends: 598 [2022-02-11 01:15:11,826 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 51 SyntacticMatches, 20 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=991, Invalid=5981, Unknown=0, NotChecked=0, Total=6972 [2022-02-11 01:15:11,826 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 281 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:11,826 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 172 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:15:11,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-02-11 01:15:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 334. [2022-02-11 01:15:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.7657657657657657) internal successors, (588), 333 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 588 transitions. [2022-02-11 01:15:11,830 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 588 transitions. Word has length 43 [2022-02-11 01:15:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:11,830 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 588 transitions. [2022-02-11 01:15:11,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 588 transitions. [2022-02-11 01:15:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:15:11,831 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:11,831 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:11,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:12,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:12,032 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:12,032 INFO L85 PathProgramCache]: Analyzing trace with hash -358595679, now seen corresponding path program 114 times [2022-02-11 01:15:12,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:12,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057160073] [2022-02-11 01:15:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:12,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:12,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:12,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057160073] [2022-02-11 01:15:12,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057160073] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:12,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76545384] [2022-02-11 01:15:12,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:15:12,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:12,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:12,348 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:12,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-11 01:15:12,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-11 01:15:12,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:12,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 01:15:12,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:12,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-02-11 01:15:12,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:12,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:12,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:12,931 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 36 treesize of output 38 [2022-02-11 01:15:13,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:13,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:15:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:13,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76545384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:13,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:13,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2022-02-11 01:15:13,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633975792] [2022-02-11 01:15:13,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:13,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-11 01:15:13,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:13,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-11 01:15:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-11 01:15:13,269 INFO L87 Difference]: Start difference. First operand 334 states and 588 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:14,534 INFO L93 Difference]: Finished difference Result 688 states and 1161 transitions. [2022-02-11 01:15:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:15:14,535 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:15:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:14,536 INFO L225 Difference]: With dead ends: 688 [2022-02-11 01:15:14,536 INFO L226 Difference]: Without dead ends: 669 [2022-02-11 01:15:14,536 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 55 SyntacticMatches, 25 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=4121, Unknown=0, NotChecked=0, Total=4556 [2022-02-11 01:15:14,536 INFO L934 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:14,536 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 168 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:15:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-11 01:15:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 367. [2022-02-11 01:15:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.7622950819672132) internal successors, (645), 366 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 645 transitions. [2022-02-11 01:15:14,540 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 645 transitions. Word has length 43 [2022-02-11 01:15:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:14,540 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 645 transitions. [2022-02-11 01:15:14,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 645 transitions. [2022-02-11 01:15:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:15:14,541 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:14,541 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:14,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:14,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:14,742 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash 699806765, now seen corresponding path program 115 times [2022-02-11 01:15:14,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:14,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225855140] [2022-02-11 01:15:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:14,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:15,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:15,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225855140] [2022-02-11 01:15:15,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225855140] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:15,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525984159] [2022-02-11 01:15:15,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:15:15,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:15,048 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:15,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-11 01:15:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:15,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:15:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:15,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:15,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:15,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:15,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:15,606 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 36 treesize of output 38 [2022-02-11 01:15:15,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:15,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:15:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:15,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525984159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:15,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:15,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-02-11 01:15:15,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102629731] [2022-02-11 01:15:15,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:15,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:15:15,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:15:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:15:15,933 INFO L87 Difference]: Start difference. First operand 367 states and 645 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:17,542 INFO L93 Difference]: Finished difference Result 980 states and 1642 transitions. [2022-02-11 01:15:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-11 01:15:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:15:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:17,543 INFO L225 Difference]: With dead ends: 980 [2022-02-11 01:15:17,543 INFO L226 Difference]: Without dead ends: 957 [2022-02-11 01:15:17,544 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 56 SyntacticMatches, 25 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=739, Invalid=5581, Unknown=0, NotChecked=0, Total=6320 [2022-02-11 01:15:17,544 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 181 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:17,544 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 196 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:15:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-11 01:15:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 486. [2022-02-11 01:15:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.7443298969072165) internal successors, (846), 485 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 846 transitions. [2022-02-11 01:15:17,549 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 846 transitions. Word has length 43 [2022-02-11 01:15:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:17,549 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 846 transitions. [2022-02-11 01:15:17,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 846 transitions. [2022-02-11 01:15:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:15:17,550 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:17,550 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:17,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-11 01:15:17,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-02-11 01:15:17,751 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash 998406505, now seen corresponding path program 116 times [2022-02-11 01:15:17,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:17,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858437091] [2022-02-11 01:15:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:17,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:15:18,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:18,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858437091] [2022-02-11 01:15:18,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858437091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:18,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460623386] [2022-02-11 01:15:18,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:15:18,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:18,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:18,087 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:18,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-11 01:15:18,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:15:18,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:15:18,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:18,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:18,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:15:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:15:18,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:18,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:18,659 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 36 treesize of output 38 [2022-02-11 01:15:18,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:18,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2022-02-11 01:15:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:15:19,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460623386] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:19,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:19,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2022-02-11 01:15:19,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726278760] [2022-02-11 01:15:19,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:19,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-11 01:15:19,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-11 01:15:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-11 01:15:19,028 INFO L87 Difference]: Start difference. First operand 486 states and 846 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:20,159 INFO L93 Difference]: Finished difference Result 1093 states and 1855 transitions. [2022-02-11 01:15:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:15:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:15:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:20,161 INFO L225 Difference]: With dead ends: 1093 [2022-02-11 01:15:20,161 INFO L226 Difference]: Without dead ends: 1080 [2022-02-11 01:15:20,161 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 56 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=547, Invalid=3743, Unknown=0, NotChecked=0, Total=4290 [2022-02-11 01:15:20,161 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 97 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:20,162 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 171 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:15:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-02-11 01:15:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 540. [2022-02-11 01:15:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.7551020408163265) internal successors, (946), 539 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 946 transitions. [2022-02-11 01:15:20,167 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 946 transitions. Word has length 43 [2022-02-11 01:15:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:20,167 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 946 transitions. [2022-02-11 01:15:20,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 946 transitions. [2022-02-11 01:15:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:15:20,168 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:20,168 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:20,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-02-11 01:15:20,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:20,368 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:20,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1353425349, now seen corresponding path program 117 times [2022-02-11 01:15:20,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:20,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601639956] [2022-02-11 01:15:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:20,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:20,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:20,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601639956] [2022-02-11 01:15:20,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601639956] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:20,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788228695] [2022-02-11 01:15:20,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:15:20,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:20,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:20,692 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:20,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-11 01:15:20,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-11 01:15:20,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:15:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 59 conjunts are in the unsatisfiable core [2022-02-11 01:15:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:15:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:21,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:21,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:21,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-11 01:15:21,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 66 [2022-02-11 01:15:22,073 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-02-11 01:15:22,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 24 [2022-02-11 01:15:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:22,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:15:25,976 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-02-11 01:15:25,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 236 [2022-02-11 01:15:32,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:32,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:15:33,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:15:33,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 229 treesize of output 265 [2022-02-11 01:15:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-11 01:15:46,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788228695] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:15:46,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:15:46,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 28] total 69 [2022-02-11 01:15:46,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547020133] [2022-02-11 01:15:46,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:15:46,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-11 01:15:46,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:15:46,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-11 01:15:46,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=4379, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:15:46,480 INFO L87 Difference]: Start difference. First operand 540 states and 946 transitions. Second operand has 70 states, 70 states have (on average 1.6142857142857143) internal successors, (113), 69 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:15:59,447 INFO L93 Difference]: Finished difference Result 1675 states and 2829 transitions. [2022-02-11 01:15:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-11 01:15:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6142857142857143) internal successors, (113), 69 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:15:59,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:15:59,449 INFO L225 Difference]: With dead ends: 1675 [2022-02-11 01:15:59,449 INFO L226 Difference]: Without dead ends: 1617 [2022-02-11 01:15:59,451 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13601 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=3191, Invalid=37815, Unknown=0, NotChecked=0, Total=41006 [2022-02-11 01:15:59,451 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 401 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 5787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2638 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:15:59,451 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 652 Invalid, 5787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 2841 Invalid, 0 Unknown, 2638 Unchecked, 1.4s Time] [2022-02-11 01:15:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2022-02-11 01:15:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 960. [2022-02-11 01:15:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.7768508863399375) internal successors, (1704), 959 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1704 transitions. [2022-02-11 01:15:59,461 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1704 transitions. Word has length 43 [2022-02-11 01:15:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:15:59,461 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1704 transitions. [2022-02-11 01:15:59,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6142857142857143) internal successors, (113), 69 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:15:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1704 transitions. [2022-02-11 01:15:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:15:59,462 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:15:59,462 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:15:59,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-02-11 01:15:59,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:59,662 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:15:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:15:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash 780688251, now seen corresponding path program 118 times [2022-02-11 01:15:59,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:15:59,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122145618] [2022-02-11 01:15:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:15:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:15:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:15:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:15:59,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:15:59,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122145618] [2022-02-11 01:15:59,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122145618] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:15:59,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960104752] [2022-02-11 01:15:59,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:15:59,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:15:59,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:15:59,995 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:15:59,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-11 01:16:00,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:16:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:16:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:00,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:00,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:00,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:00,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:00,571 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 36 treesize of output 38 [2022-02-11 01:16:00,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:00,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:16:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:00,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960104752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:00,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:00,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-11 01:16:00,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463648761] [2022-02-11 01:16:00,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:00,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:00,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:00,948 INFO L87 Difference]: Start difference. First operand 960 states and 1704 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:02,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:02,050 INFO L93 Difference]: Finished difference Result 1527 states and 2688 transitions. [2022-02-11 01:16:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-11 01:16:02,050 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:02,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:02,052 INFO L225 Difference]: With dead ends: 1527 [2022-02-11 01:16:02,052 INFO L226 Difference]: Without dead ends: 1514 [2022-02-11 01:16:02,052 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 56 SyntacticMatches, 23 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=531, Invalid=3501, Unknown=0, NotChecked=0, Total=4032 [2022-02-11 01:16:02,053 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:02,053 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 209 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:16:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-02-11 01:16:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 896. [2022-02-11 01:16:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.7664804469273743) internal successors, (1581), 895 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1581 transitions. [2022-02-11 01:16:02,062 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1581 transitions. Word has length 43 [2022-02-11 01:16:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:02,062 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1581 transitions. [2022-02-11 01:16:02,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1581 transitions. [2022-02-11 01:16:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:02,063 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:02,063 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:02,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-02-11 01:16:02,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:02,263 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash -80491641, now seen corresponding path program 119 times [2022-02-11 01:16:02,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:02,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147063802] [2022-02-11 01:16:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:02,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:02,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147063802] [2022-02-11 01:16:02,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147063802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:02,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405136473] [2022-02-11 01:16:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:16:02,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:02,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:02,577 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:02,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-11 01:16:02,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-11 01:16:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:02,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:16:02,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:02,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:02,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:02,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:03,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:03,175 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 36 treesize of output 38 [2022-02-11 01:16:03,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:03,242 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 43 treesize of output 43 [2022-02-11 01:16:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:03,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405136473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:03,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:03,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-02-11 01:16:03,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683400357] [2022-02-11 01:16:03,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:03,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:16:03,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:16:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:16:03,574 INFO L87 Difference]: Start difference. First operand 896 states and 1581 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:04,608 INFO L93 Difference]: Finished difference Result 1292 states and 2255 transitions. [2022-02-11 01:16:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 01:16:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:04,610 INFO L225 Difference]: With dead ends: 1292 [2022-02-11 01:16:04,610 INFO L226 Difference]: Without dead ends: 1276 [2022-02-11 01:16:04,610 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 56 SyntacticMatches, 22 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=376, Invalid=3284, Unknown=0, NotChecked=0, Total=3660 [2022-02-11 01:16:04,610 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 106 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:04,610 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 164 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:16:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-02-11 01:16:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 903. [2022-02-11 01:16:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 1.7671840354767183) internal successors, (1594), 902 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1594 transitions. [2022-02-11 01:16:04,619 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1594 transitions. Word has length 43 [2022-02-11 01:16:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:04,619 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1594 transitions. [2022-02-11 01:16:04,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1594 transitions. [2022-02-11 01:16:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:04,620 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:04,620 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:04,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-11 01:16:04,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:04,821 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:04,821 INFO L85 PathProgramCache]: Analyzing trace with hash -997351801, now seen corresponding path program 120 times [2022-02-11 01:16:04,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:04,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414185247] [2022-02-11 01:16:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:05,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:05,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414185247] [2022-02-11 01:16:05,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414185247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:05,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557741413] [2022-02-11 01:16:05,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:16:05,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:05,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:05,148 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:05,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-11 01:16:05,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-11 01:16:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:05,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-11 01:16:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:05,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:05,494 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 [2022-02-11 01:16:05,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:05,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:05,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:05,849 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 36 treesize of output 38 [2022-02-11 01:16:06,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:06,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2022-02-11 01:16:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:06,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557741413] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:06,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:06,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-02-11 01:16:06,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929896242] [2022-02-11 01:16:06,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:06,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-11 01:16:06,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-11 01:16:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 01:16:06,507 INFO L87 Difference]: Start difference. First operand 903 states and 1594 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:07,908 INFO L93 Difference]: Finished difference Result 1271 states and 2245 transitions. [2022-02-11 01:16:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-11 01:16:07,908 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have 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 [2022-02-11 01:16:07,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:07,910 INFO L225 Difference]: With dead ends: 1271 [2022-02-11 01:16:07,910 INFO L226 Difference]: Without dead ends: 1260 [2022-02-11 01:16:07,910 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=915, Invalid=5565, Unknown=0, NotChecked=0, Total=6480 [2022-02-11 01:16:07,910 INFO L934 BasicCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:07,910 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 201 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1028 Invalid, 0 Unknown, 128 Unchecked, 0.4s Time] [2022-02-11 01:16:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-02-11 01:16:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 901. [2022-02-11 01:16:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.7644444444444445) internal successors, (1588), 900 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1588 transitions. [2022-02-11 01:16:07,919 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1588 transitions. Word has length 43 [2022-02-11 01:16:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:07,919 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1588 transitions. [2022-02-11 01:16:07,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:07,919 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1588 transitions. [2022-02-11 01:16:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:07,920 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:07,920 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:07,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:08,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-11 01:16:08,121 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash -115286077, now seen corresponding path program 121 times [2022-02-11 01:16:08,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:08,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683880523] [2022-02-11 01:16:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:08,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:08,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:08,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683880523] [2022-02-11 01:16:08,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683880523] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:08,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827283235] [2022-02-11 01:16:08,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:16:08,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:08,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:08,472 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-11 01:16:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:08,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:16:08,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:08,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:08,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:08,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:09,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:09,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:16:09,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:09,170 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 28 treesize of output 28 [2022-02-11 01:16:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:09,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827283235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:09,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:09,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-11 01:16:09,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081602894] [2022-02-11 01:16:09,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:09,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:09,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:09,389 INFO L87 Difference]: Start difference. First operand 901 states and 1588 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:10,809 INFO L93 Difference]: Finished difference Result 1322 states and 2323 transitions. [2022-02-11 01:16:10,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:16:10,809 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:10,810 INFO L225 Difference]: With dead ends: 1322 [2022-02-11 01:16:10,810 INFO L226 Difference]: Without dead ends: 1306 [2022-02-11 01:16:10,811 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=604, Invalid=4226, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:16:10,811 INFO L934 BasicCegarLoop]: 11 mSDtfsCounter, 140 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:10,811 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 158 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:16:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-02-11 01:16:10,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 899. [2022-02-11 01:16:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.7628062360801782) internal successors, (1583), 898 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1583 transitions. [2022-02-11 01:16:10,830 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1583 transitions. Word has length 43 [2022-02-11 01:16:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:10,830 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1583 transitions. [2022-02-11 01:16:10,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:10,830 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1583 transitions. [2022-02-11 01:16:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:10,831 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:10,832 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:10,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:11,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-11 01:16:11,035 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 472459245, now seen corresponding path program 122 times [2022-02-11 01:16:11,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:11,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617807378] [2022-02-11 01:16:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:11,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:11,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617807378] [2022-02-11 01:16:11,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617807378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:11,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441335506] [2022-02-11 01:16:11,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:16:11,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:11,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:11,367 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:11,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-11 01:16:11,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:16:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:16:11,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:11,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:11,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:11,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:11,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:11,932 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 36 treesize of output 38 [2022-02-11 01:16:12,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:12,060 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 28 treesize of output 28 [2022-02-11 01:16:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:12,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441335506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:12,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:12,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-11 01:16:12,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920780307] [2022-02-11 01:16:12,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:12,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:12,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:12,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:12,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:12,299 INFO L87 Difference]: Start difference. First operand 899 states and 1583 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:13,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:13,896 INFO L93 Difference]: Finished difference Result 1688 states and 2914 transitions. [2022-02-11 01:16:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-11 01:16:13,896 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:13,898 INFO L225 Difference]: With dead ends: 1688 [2022-02-11 01:16:13,898 INFO L226 Difference]: Without dead ends: 1665 [2022-02-11 01:16:13,899 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=693, Invalid=5313, Unknown=0, NotChecked=0, Total=6006 [2022-02-11 01:16:13,899 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:13,899 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 207 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:16:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-02-11 01:16:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 896. [2022-02-11 01:16:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.7620111731843575) internal successors, (1577), 895 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1577 transitions. [2022-02-11 01:16:13,909 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1577 transitions. Word has length 43 [2022-02-11 01:16:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:13,909 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1577 transitions. [2022-02-11 01:16:13,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1577 transitions. [2022-02-11 01:16:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:13,911 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:13,911 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:13,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:14,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:14,127 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:14,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1738303899, now seen corresponding path program 123 times [2022-02-11 01:16:14,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:14,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435594606] [2022-02-11 01:16:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:14,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:14,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:14,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435594606] [2022-02-11 01:16:14,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435594606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:14,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135644827] [2022-02-11 01:16:14,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:16:14,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:14,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:14,461 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:14,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-11 01:16:14,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-02-11 01:16:14,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 01:16:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:14,812 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 [2022-02-11 01:16:14,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:14,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-11 01:16:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:14,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:15,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:15,210 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 36 treesize of output 38 [2022-02-11 01:16:15,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:15,375 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 28 treesize of output 28 [2022-02-11 01:16:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:15,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135644827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:15,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:15,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-02-11 01:16:15,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403919222] [2022-02-11 01:16:15,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:15,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-11 01:16:15,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-11 01:16:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2022-02-11 01:16:15,854 INFO L87 Difference]: Start difference. First operand 896 states and 1577 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:17,812 INFO L93 Difference]: Finished difference Result 2428 states and 4159 transitions. [2022-02-11 01:16:17,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 01:16:17,813 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 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) Word has length 43 [2022-02-11 01:16:17,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:17,815 INFO L225 Difference]: With dead ends: 2428 [2022-02-11 01:16:17,815 INFO L226 Difference]: Without dead ends: 2417 [2022-02-11 01:16:17,816 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1418, Invalid=9294, Unknown=0, NotChecked=0, Total=10712 [2022-02-11 01:16:17,816 INFO L934 BasicCegarLoop]: 18 mSDtfsCounter, 243 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:17,816 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 327 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1098 Invalid, 0 Unknown, 194 Unchecked, 0.5s Time] [2022-02-11 01:16:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-02-11 01:16:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1482. [2022-02-11 01:16:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 1.7670492910195814) internal successors, (2617), 1481 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2617 transitions. [2022-02-11 01:16:17,830 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2617 transitions. Word has length 43 [2022-02-11 01:16:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:17,830 INFO L470 AbstractCegarLoop]: Abstraction has 1482 states and 2617 transitions. [2022-02-11 01:16:17,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2617 transitions. [2022-02-11 01:16:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:17,831 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:17,831 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:17,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:18,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-11 01:16:18,032 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1019244167, now seen corresponding path program 124 times [2022-02-11 01:16:18,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:18,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084430757] [2022-02-11 01:16:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:18,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:18,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:18,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084430757] [2022-02-11 01:16:18,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084430757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:18,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264783798] [2022-02-11 01:16:18,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:16:18,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:18,340 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:18,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-11 01:16:18,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:16:18,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:18,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:16:18,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:18,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:18,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:18,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:18,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:18,924 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 36 treesize of output 38 [2022-02-11 01:16:19,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:19,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:16:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:19,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264783798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:19,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:19,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-11 01:16:19,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84006478] [2022-02-11 01:16:19,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:19,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:19,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:19,273 INFO L87 Difference]: Start difference. First operand 1482 states and 2617 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:21,397 INFO L93 Difference]: Finished difference Result 2939 states and 5090 transitions. [2022-02-11 01:16:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-11 01:16:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:21,401 INFO L225 Difference]: With dead ends: 2939 [2022-02-11 01:16:21,401 INFO L226 Difference]: Without dead ends: 2926 [2022-02-11 01:16:21,402 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=883, Invalid=7307, Unknown=0, NotChecked=0, Total=8190 [2022-02-11 01:16:21,402 INFO L934 BasicCegarLoop]: 14 mSDtfsCounter, 223 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:21,402 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 238 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:16:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2022-02-11 01:16:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1922. [2022-02-11 01:16:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 1.7850078084331078) internal successors, (3429), 1921 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 3429 transitions. [2022-02-11 01:16:21,422 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 3429 transitions. Word has length 43 [2022-02-11 01:16:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:21,422 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 3429 transitions. [2022-02-11 01:16:21,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 3429 transitions. [2022-02-11 01:16:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:21,424 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:21,424 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:21,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:21,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-11 01:16:21,625 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1901309891, now seen corresponding path program 125 times [2022-02-11 01:16:21,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:21,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887548578] [2022-02-11 01:16:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:21,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:21,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:21,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887548578] [2022-02-11 01:16:21,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887548578] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:21,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653529247] [2022-02-11 01:16:21,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:16:21,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:21,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:21,941 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:21,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-11 01:16:21,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-02-11 01:16:21,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:16:21,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:22,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:22,223 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 13 treesize of output 9 [2022-02-11 01:16:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:22,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:22,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:22,514 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 36 treesize of output 38 [2022-02-11 01:16:22,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:22,636 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 30 treesize of output 30 [2022-02-11 01:16:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:22,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653529247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:22,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:22,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-11 01:16:22,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721402214] [2022-02-11 01:16:22,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:22,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:22,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:22,863 INFO L87 Difference]: Start difference. First operand 1922 states and 3429 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:24,255 INFO L93 Difference]: Finished difference Result 2679 states and 4696 transitions. [2022-02-11 01:16:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-11 01:16:24,256 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:24,259 INFO L225 Difference]: With dead ends: 2679 [2022-02-11 01:16:24,259 INFO L226 Difference]: Without dead ends: 2663 [2022-02-11 01:16:24,260 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 57 SyntacticMatches, 22 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=613, Invalid=4217, Unknown=0, NotChecked=0, Total=4830 [2022-02-11 01:16:24,260 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:24,260 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 145 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:16:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2022-02-11 01:16:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 970. [2022-02-11 01:16:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 1.7564499484004128) internal successors, (1702), 969 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1702 transitions. [2022-02-11 01:16:24,276 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1702 transitions. Word has length 43 [2022-02-11 01:16:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:24,276 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1702 transitions. [2022-02-11 01:16:24,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1702 transitions. [2022-02-11 01:16:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:24,277 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:24,277 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:24,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:24,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-11 01:16:24,478 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:24,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1248462555, now seen corresponding path program 126 times [2022-02-11 01:16:24,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:24,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655012298] [2022-02-11 01:16:24,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:24,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:24,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:24,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655012298] [2022-02-11 01:16:24,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655012298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:24,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209184699] [2022-02-11 01:16:24,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:16:24,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:24,784 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:24,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-11 01:16:24,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-11 01:16:24,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 01:16:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:25,170 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 [2022-02-11 01:16:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:25,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-11 01:16:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:25,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:25,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:25,649 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 36 treesize of output 38 [2022-02-11 01:16:25,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:25,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:16:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:26,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209184699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:26,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:26,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2022-02-11 01:16:26,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741978601] [2022-02-11 01:16:26,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:26,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-11 01:16:26,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-11 01:16:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2236, Unknown=0, NotChecked=0, Total=2550 [2022-02-11 01:16:26,331 INFO L87 Difference]: Start difference. First operand 970 states and 1702 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:27,942 INFO L93 Difference]: Finished difference Result 1309 states and 2226 transitions. [2022-02-11 01:16:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-11 01:16:27,942 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:27,944 INFO L225 Difference]: With dead ends: 1309 [2022-02-11 01:16:27,944 INFO L226 Difference]: Without dead ends: 1296 [2022-02-11 01:16:27,944 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=834, Invalid=6306, Unknown=0, NotChecked=0, Total=7140 [2022-02-11 01:16:27,944 INFO L934 BasicCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:27,945 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 300 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1257 Invalid, 0 Unknown, 223 Unchecked, 0.5s Time] [2022-02-11 01:16:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-02-11 01:16:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 800. [2022-02-11 01:16:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.7446808510638299) internal successors, (1394), 799 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1394 transitions. [2022-02-11 01:16:27,953 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1394 transitions. Word has length 43 [2022-02-11 01:16:27,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:27,953 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1394 transitions. [2022-02-11 01:16:27,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1394 transitions. [2022-02-11 01:16:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:27,954 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:27,954 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:27,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:28,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-02-11 01:16:28,155 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:28,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:28,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1021894279, now seen corresponding path program 127 times [2022-02-11 01:16:28,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:28,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144090296] [2022-02-11 01:16:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:28,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:28,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:28,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144090296] [2022-02-11 01:16:28,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144090296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:28,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34538718] [2022-02-11 01:16:28,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:16:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:28,478 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:28,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-11 01:16:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:16:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:28,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:28,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:28,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:29,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:29,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:16:29,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:29,204 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 30 treesize of output 30 [2022-02-11 01:16:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:29,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34538718] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:29,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:29,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-11 01:16:29,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477049736] [2022-02-11 01:16:29,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:29,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:29,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:29,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:29,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:29,425 INFO L87 Difference]: Start difference. First operand 800 states and 1394 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:30,790 INFO L93 Difference]: Finished difference Result 1135 states and 1934 transitions. [2022-02-11 01:16:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-11 01:16:30,790 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:30,792 INFO L225 Difference]: With dead ends: 1135 [2022-02-11 01:16:30,792 INFO L226 Difference]: Without dead ends: 1122 [2022-02-11 01:16:30,792 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 54 SyntacticMatches, 25 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=598, Invalid=4094, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:16:30,792 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 177 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:30,792 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 139 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:16:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-02-11 01:16:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 789. [2022-02-11 01:16:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 1.7208121827411167) internal successors, (1356), 788 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1356 transitions. [2022-02-11 01:16:30,799 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1356 transitions. Word has length 43 [2022-02-11 01:16:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:30,800 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 1356 transitions. [2022-02-11 01:16:30,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1356 transitions. [2022-02-11 01:16:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:30,800 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:30,800 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:30,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:31,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:31,002 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1433302881, now seen corresponding path program 128 times [2022-02-11 01:16:31,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:31,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698254934] [2022-02-11 01:16:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:31,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:31,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:31,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698254934] [2022-02-11 01:16:31,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698254934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:31,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026219438] [2022-02-11 01:16:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-11 01:16:31,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:31,315 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:31,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-11 01:16:31,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-11 01:16:31,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:31,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-11 01:16:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:31,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:31,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:31,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:31,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:31,931 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 36 treesize of output 38 [2022-02-11 01:16:32,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:32,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-02-11 01:16:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:32,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026219438] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:32,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:32,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-02-11 01:16:32,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228550410] [2022-02-11 01:16:32,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:32,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:16:32,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:32,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:16:32,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:16:32,289 INFO L87 Difference]: Start difference. First operand 789 states and 1356 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:33,831 INFO L93 Difference]: Finished difference Result 1537 states and 2583 transitions. [2022-02-11 01:16:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-11 01:16:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:33,833 INFO L225 Difference]: With dead ends: 1537 [2022-02-11 01:16:33,833 INFO L226 Difference]: Without dead ends: 1518 [2022-02-11 01:16:33,833 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 25 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=486, Invalid=4916, Unknown=0, NotChecked=0, Total=5402 [2022-02-11 01:16:33,833 INFO L934 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:33,833 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 204 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:16:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-02-11 01:16:33,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 517. [2022-02-11 01:16:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.7131782945736433) internal successors, (884), 516 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 884 transitions. [2022-02-11 01:16:33,840 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 884 transitions. Word has length 43 [2022-02-11 01:16:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:33,840 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 884 transitions. [2022-02-11 01:16:33,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 884 transitions. [2022-02-11 01:16:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:33,840 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:33,840 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:33,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-02-11 01:16:34,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:34,041 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1803261971, now seen corresponding path program 129 times [2022-02-11 01:16:34,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:34,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107195650] [2022-02-11 01:16:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:34,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:34,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:34,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107195650] [2022-02-11 01:16:34,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107195650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:34,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214804223] [2022-02-11 01:16:34,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-11 01:16:34,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:34,435 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:34,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-11 01:16:34,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-11 01:16:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-11 01:16:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:34,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-11 01:16:34,850 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 [2022-02-11 01:16:34,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:34,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:35,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:35,213 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 36 treesize of output 38 [2022-02-11 01:16:35,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:35,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-02-11 01:16:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:35,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214804223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:35,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:35,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-02-11 01:16:35,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224811420] [2022-02-11 01:16:35,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:35,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-11 01:16:35,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-11 01:16:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2022-02-11 01:16:35,875 INFO L87 Difference]: Start difference. First operand 517 states and 884 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:37,491 INFO L93 Difference]: Finished difference Result 1097 states and 1868 transitions. [2022-02-11 01:16:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-11 01:16:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:37,492 INFO L225 Difference]: With dead ends: 1097 [2022-02-11 01:16:37,492 INFO L226 Difference]: Without dead ends: 1074 [2022-02-11 01:16:37,493 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 59 SyntacticMatches, 15 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1233, Invalid=7139, Unknown=0, NotChecked=0, Total=8372 [2022-02-11 01:16:37,493 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 225 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:37,493 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 173 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 787 Invalid, 0 Unknown, 284 Unchecked, 0.3s Time] [2022-02-11 01:16:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-02-11 01:16:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 513. [2022-02-11 01:16:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.7109375) internal successors, (876), 512 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 876 transitions. [2022-02-11 01:16:37,499 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 876 transitions. Word has length 43 [2022-02-11 01:16:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:37,499 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 876 transitions. [2022-02-11 01:16:37,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 876 transitions. [2022-02-11 01:16:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:37,499 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:37,499 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:37,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:37,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-02-11 01:16:37,700 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1163007905, now seen corresponding path program 130 times [2022-02-11 01:16:37,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:37,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366187835] [2022-02-11 01:16:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:37,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:38,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:38,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366187835] [2022-02-11 01:16:38,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366187835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:38,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806853873] [2022-02-11 01:16:38,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-11 01:16:38,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:38,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:38,076 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:38,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-11 01:16:38,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-11 01:16:38,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 01:16:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:38,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:38,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-02-11 01:16:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:38,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:38,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:38,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:16:38,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:38,786 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 30 treesize of output 30 [2022-02-11 01:16:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:39,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806853873] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:39,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:39,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-11 01:16:39,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111340571] [2022-02-11 01:16:39,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:39,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:39,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:39,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:39,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:39,008 INFO L87 Difference]: Start difference. First operand 513 states and 876 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:40,609 INFO L93 Difference]: Finished difference Result 1550 states and 2619 transitions. [2022-02-11 01:16:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-11 01:16:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:40,611 INFO L225 Difference]: With dead ends: 1550 [2022-02-11 01:16:40,611 INFO L226 Difference]: Without dead ends: 1527 [2022-02-11 01:16:40,611 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 54 SyntacticMatches, 25 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=723, Invalid=5439, Unknown=0, NotChecked=0, Total=6162 [2022-02-11 01:16:40,611 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:40,611 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 119 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-11 01:16:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-02-11 01:16:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 599. [2022-02-11 01:16:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.7023411371237458) internal successors, (1018), 598 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1018 transitions. [2022-02-11 01:16:40,619 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1018 transitions. Word has length 43 [2022-02-11 01:16:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:40,619 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1018 transitions. [2022-02-11 01:16:40,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1018 transitions. [2022-02-11 01:16:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:40,620 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:40,620 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:40,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:40,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:40,833 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1167134781, now seen corresponding path program 131 times [2022-02-11 01:16:40,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:40,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167017614] [2022-02-11 01:16:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-11 01:16:41,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:41,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167017614] [2022-02-11 01:16:41,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167017614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:41,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515424449] [2022-02-11 01:16:41,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-11 01:16:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:41,148 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:41,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-11 01:16:41,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-11 01:16:41,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-11 01:16:41,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:41,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:41,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:16:41,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:41,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:41,779 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:16:41,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:41,910 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 28 treesize of output 28 [2022-02-11 01:16:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-11 01:16:42,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515424449] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:42,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:42,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 36 [2022-02-11 01:16:42,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725886510] [2022-02-11 01:16:42,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:42,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-11 01:16:42,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-11 01:16:42,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-02-11 01:16:42,235 INFO L87 Difference]: Start difference. First operand 599 states and 1018 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:43,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:43,454 INFO L93 Difference]: Finished difference Result 1001 states and 1713 transitions. [2022-02-11 01:16:43,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-11 01:16:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:43,455 INFO L225 Difference]: With dead ends: 1001 [2022-02-11 01:16:43,455 INFO L226 Difference]: Without dead ends: 991 [2022-02-11 01:16:43,455 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 54 SyntacticMatches, 19 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=635, Invalid=4057, Unknown=0, NotChecked=0, Total=4692 [2022-02-11 01:16:43,455 INFO L934 BasicCegarLoop]: 9 mSDtfsCounter, 162 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:43,455 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 128 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-11 01:16:43,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-02-11 01:16:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 469. [2022-02-11 01:16:43,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.7008547008547008) internal successors, (796), 468 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 796 transitions. [2022-02-11 01:16:43,461 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 796 transitions. Word has length 43 [2022-02-11 01:16:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:43,461 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 796 transitions. [2022-02-11 01:16:43,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:43,461 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 796 transitions. [2022-02-11 01:16:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-11 01:16:43,462 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:43,462 INFO L515 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:43,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:43,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:43,666 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:43,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1612656009, now seen corresponding path program 132 times [2022-02-11 01:16:43,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:43,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927230802] [2022-02-11 01:16:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:43,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:43,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:16:43,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:43,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927230802] [2022-02-11 01:16:43,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927230802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:43,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184058286] [2022-02-11 01:16:43,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-11 01:16:43,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:43,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:43,978 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:43,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-11 01:16:44,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-11 01:16:44,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-11 01:16:44,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-11 01:16:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:44,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:44,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-02-11 01:16:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:16:44,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:44,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:44,616 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 36 treesize of output 38 [2022-02-11 01:16:44,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:44,677 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 36 treesize of output 38 [2022-02-11 01:16:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-11 01:16:45,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184058286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:45,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:45,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-02-11 01:16:45,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520861365] [2022-02-11 01:16:45,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:45,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-11 01:16:45,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:45,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-11 01:16:45,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-11 01:16:45,004 INFO L87 Difference]: Start difference. First operand 469 states and 796 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:46,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:46,037 INFO L93 Difference]: Finished difference Result 968 states and 1622 transitions. [2022-02-11 01:16:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-11 01:16:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-02-11 01:16:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:46,039 INFO L225 Difference]: With dead ends: 968 [2022-02-11 01:16:46,039 INFO L226 Difference]: Without dead ends: 952 [2022-02-11 01:16:46,039 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 53 SyntacticMatches, 25 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=368, Invalid=3414, Unknown=0, NotChecked=0, Total=3782 [2022-02-11 01:16:46,039 INFO L934 BasicCegarLoop]: 8 mSDtfsCounter, 82 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:46,039 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 107 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:16:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-02-11 01:16:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 222. [2022-02-11 01:16:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.669683257918552) internal successors, (369), 221 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:46,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 369 transitions. [2022-02-11 01:16:46,043 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 369 transitions. Word has length 43 [2022-02-11 01:16:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:46,043 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 369 transitions. [2022-02-11 01:16:46,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:46,043 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 369 transitions. [2022-02-11 01:16:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-11 01:16:46,044 INFO L507 BasicCegarLoop]: Found error trace [2022-02-11 01:16:46,044 INFO L515 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-11 01:16:46,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:46,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-11 01:16:46,262 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-11 01:16:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-11 01:16:46,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1138252331, now seen corresponding path program 133 times [2022-02-11 01:16:46,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-11 01:16:46,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154959441] [2022-02-11 01:16:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-11 01:16:46,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-11 01:16:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-11 01:16:46,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-11 01:16:46,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154959441] [2022-02-11 01:16:46,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154959441] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-11 01:16:46,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320235091] [2022-02-11 01:16:46,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-11 01:16:46,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-11 01:16:46,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-11 01:16:46,603 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-11 01:16:46,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-11 01:16:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-11 01:16:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 47 conjunts are in the unsatisfiable core [2022-02-11 01:16:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-11 01:16:46,916 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 13 treesize of output 9 [2022-02-11 01:16:46,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-11 01:16:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-11 01:16:47,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-11 01:16:47,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:47,220 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-11 01:16:47,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-11 01:16:47,345 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 28 treesize of output 28 [2022-02-11 01:16:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-02-11 01:16:47,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320235091] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-11 01:16:47,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-11 01:16:47,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-02-11 01:16:47,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844102834] [2022-02-11 01:16:47,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-11 01:16:47,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-11 01:16:47,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-11 01:16:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-11 01:16:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-02-11 01:16:47,616 INFO L87 Difference]: Start difference. First operand 222 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-11 01:16:48,543 INFO L93 Difference]: Finished difference Result 364 states and 607 transitions. [2022-02-11 01:16:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-11 01:16:48,544 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-02-11 01:16:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-11 01:16:48,544 INFO L225 Difference]: With dead ends: 364 [2022-02-11 01:16:48,544 INFO L226 Difference]: Without dead ends: 0 [2022-02-11 01:16:48,544 INFO L933 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 66 SyntacticMatches, 33 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=471, Invalid=3069, Unknown=0, NotChecked=0, Total=3540 [2022-02-11 01:16:48,544 INFO L934 BasicCegarLoop]: 4 mSDtfsCounter, 100 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-11 01:16:48,545 INFO L935 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 56 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-11 01:16:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-11 01:16:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-11 01:16:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-11 01:16:48,545 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2022-02-11 01:16:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-11 01:16:48,545 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-11 01:16:48,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-11 01:16:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-11 01:16:48,545 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-11 01:16:48,548 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-11 01:16:48,548 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-11 01:16:48,548 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-11 01:16:48,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-11 01:16:48,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-11 01:16:48,766 INFO L733 BasicCegarLoop]: Path program histogram: [133, 1, 1, 1] [2022-02-11 01:16:48,768 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-11 01:16:48,768 INFO L184 ceAbstractionStarter]: Computing trace abstraction results [2022-02-11 01:16:48,769 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.02 01:16:48 BasicIcfg [2022-02-11 01:16:48,769 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-11 01:16:48,770 INFO L158 Benchmark]: Toolchain (without parser) took 547346.04ms. Allocated memory was 177.2MB in the beginning and 307.2MB in the end (delta: 130.0MB). Free memory was 138.7MB in the beginning and 228.2MB in the end (delta: -89.6MB). Peak memory consumption was 42.0MB. Max. memory is 8.0GB. [2022-02-11 01:16:48,770 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 177.2MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-11 01:16:48,770 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.69ms. Allocated memory is still 177.2MB. Free memory was 138.7MB in the beginning and 137.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-11 01:16:48,770 INFO L158 Benchmark]: Boogie Preprocessor took 15.87ms. Allocated memory is still 177.2MB. Free memory was 137.1MB in the beginning and 136.2MB in the end (delta: 925.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-11 01:16:48,770 INFO L158 Benchmark]: RCFGBuilder took 271.89ms. Allocated memory is still 177.2MB. Free memory was 136.1MB in the beginning and 126.9MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-11 01:16:48,770 INFO L158 Benchmark]: TraceAbstraction took 547025.39ms. Allocated memory was 177.2MB in the beginning and 307.2MB in the end (delta: 130.0MB). Free memory was 126.4MB in the beginning and 228.2MB in the end (delta: -101.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2022-02-11 01:16:48,771 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 177.2MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.69ms. Allocated memory is still 177.2MB. Free memory was 138.7MB in the beginning and 137.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.87ms. Allocated memory is still 177.2MB. Free memory was 137.1MB in the beginning and 136.2MB in the end (delta: 925.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 271.89ms. Allocated memory is still 177.2MB. Free memory was 136.1MB in the beginning and 126.9MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 547025.39ms. Allocated memory was 177.2MB in the beginning and 307.2MB in the end (delta: 130.0MB). Free memory was 126.4MB in the beginning and 228.2MB in the end (delta: -101.9MB). Peak memory consumption was 29.4MB. 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 - PositiveResult [Line: 62]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 546.9s, OverallIterations: 136, TraceHistogramMax: 5, PathProgramHistogramMax: 133, EmptinessCheckTime: 0.2s, AutomataDifference: 291.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27018 SdHoareTripleChecker+Valid, 64.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27018 mSDsluCounter, 28327 SdHoareTripleChecker+Invalid, 54.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 18297 IncrementalHoareTripleChecker+Unchecked, 47832 mSDsCounter, 31035 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 131957 IncrementalHoareTripleChecker+Invalid, 181289 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31035 mSolverCounterUnsat, 1843 mSDtfsCounter, 131957 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18000 GetRequests, 5303 SyntacticMatches, 1759 SemanticMatches, 10938 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 327510 ImplicationChecksByTransitivity, 306.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2688occurred in iteration=87, InterpolantAutomatonStates: 7982, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 136 MinimizatonAttempts, 78965 StatesRemovedByMinimization, 134 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 220.8s InterpolantComputationTime, 8919 NumberOfCodeBlocks, 8919 NumberOfCodeBlocksAsserted, 522 NumberOfCheckSat, 12912 ConstructedInterpolants, 221 QuantifiedInterpolants, 212826 SizeOfPredicates, 1590 NumberOfNonLiveVariables, 12652 ConjunctsInSsa, 4048 ConjunctsInUnsatCore, 400 InterpolantComputations, 5 PerfectInterpolantSequences, 1268/11508 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-11 01:16:48,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...