/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:46:13,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:46:13,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:46:13,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:46:13,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 19:46:13,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 19:46:13,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 19:46:13,307 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-Delay.epf [2021-08-06 19:46:13,323 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:46:13,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:46:13,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:46:13,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:46:13,324 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:46:13,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:46:13,324 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:46:13,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:46:13,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:46:13,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:46:13,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:46:13,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:46:13,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:46:13,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:46:13,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:46:13,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:46:13,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:46:13,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:46:13,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:46:13,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:46:13,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:46:13,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:46:13,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:46:13,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:46:13,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:46:13,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:46:13,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:46:13,328 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:46:13,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:46:13,328 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:46:13,328 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:46:13,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:46:13,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:46:13,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:46:13,610 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:46:13,613 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:46:13,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl [2021-08-06 19:46:13,614 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-08-06 19:46:13,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:46:13,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:46:13,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:46:13,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:46:13,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:46:13,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:46:13,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:46:13,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:46:13,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:46:13,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:46:13,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:46:13,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:46:13,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:46:13,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/1) ... [2021-08-06 19:46:13,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:46:13,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:13,754 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) [2021-08-06 19:46:13,764 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 [2021-08-06 19:46:13,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:46:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:46:13,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:46:13,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:46:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:46:13,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:46:13,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:46:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:46:13,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:46:13,788 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:46:14,335 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:46:14,335 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-06 19:46:14,337 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:46:14 BoogieIcfgContainer [2021-08-06 19:46:14,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:46:14,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:46:14,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:46:14,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:46:14,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:46:13" (1/2) ... [2021-08-06 19:46:14,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38404865 and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:46:14, skipping insertion in model container [2021-08-06 19:46:14,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:46:14" (2/2) ... [2021-08-06 19:46:14,341 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-08-06 19:46:14,346 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:46:14,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:46:14,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:46:14,348 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:46:14,383 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 19:46:14,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:46:14,425 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, mConcurrency=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 [2021-08-06 19:46:14,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 19:46:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 38 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) [2021-08-06 19:46:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 19:46:14,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:14,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:14,499 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:14,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1483682293, now seen corresponding path program 1 times [2021-08-06 19:46:14,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:14,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475060457] [2021-08-06 19:46:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:14,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:15,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4109, result has 25.5 percent of original size [2021-08-06 19:46:16,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4109, result has 25.5 percent of original size [2021-08-06 19:46:16,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3047, result has 9.0 percent of original size [2021-08-06 19:46:17,119 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3047, result has 9.0 percent of original size [2021-08-06 19:46:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:17,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475060457] [2021-08-06 19:46:17,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475060457] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:46:17,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683520642] [2021-08-06 19:46:17,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:46:17,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:46:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:46:17,275 INFO L87 Difference]: Start difference. First operand has 39 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 38 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) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:17,513 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2021-08-06 19:46:17,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:46:17,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-06 19:46:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:17,523 INFO L225 Difference]: With dead ends: 66 [2021-08-06 19:46:17,523 INFO L226 Difference]: Without dead ends: 25 [2021-08-06 19:46:17,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:46:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-06 19:46:17,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2021-08-06 19:46:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 25 transitions. [2021-08-06 19:46:17,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 25 transitions. Word has length 10 [2021-08-06 19:46:17,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:17,543 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 25 transitions. [2021-08-06 19:46:17,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 25 transitions. [2021-08-06 19:46:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:46:17,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:17,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:17,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:46:17,544 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:17,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1172848206, now seen corresponding path program 1 times [2021-08-06 19:46:17,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:17,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280684585] [2021-08-06 19:46:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:17,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:17,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280684585] [2021-08-06 19:46:17,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280684585] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:17,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900123468] [2021-08-06 19:46:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:17,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:17,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,573 INFO L87 Difference]: Start difference. First operand 17 states and 25 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-06 19:46:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:17,577 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2021-08-06 19:46:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-08-06 19:46:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:17,578 INFO L225 Difference]: With dead ends: 18 [2021-08-06 19:46:17,578 INFO L226 Difference]: Without dead ends: 18 [2021-08-06 19:46:17,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-06 19:46:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-06 19:46:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2021-08-06 19:46:17,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 11 [2021-08-06 19:46:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:17,580 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2021-08-06 19:46:17,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-06 19:46:17,580 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2021-08-06 19:46:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:46:17,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:17,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 19:46:17,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1443952883, now seen corresponding path program 1 times [2021-08-06 19:46:17,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:17,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732982797] [2021-08-06 19:46:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:17,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:17,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732982797] [2021-08-06 19:46:17,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732982797] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:17,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546787168] [2021-08-06 19:46:17,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:17,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,608 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-06 19:46:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:17,612 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-08-06 19:46:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:17,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-08-06 19:46:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:17,613 INFO L225 Difference]: With dead ends: 19 [2021-08-06 19:46:17,613 INFO L226 Difference]: Without dead ends: 19 [2021-08-06 19:46:17,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-06 19:46:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-06 19:46:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2021-08-06 19:46:17,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 11 [2021-08-06 19:46:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:17,622 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2021-08-06 19:46:17,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-06 19:46:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2021-08-06 19:46:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:46:17,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:17,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:17,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:46:17,623 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:17,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:17,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1150346156, now seen corresponding path program 1 times [2021-08-06 19:46:17,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:17,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159820998] [2021-08-06 19:46:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:17,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:17,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159820998] [2021-08-06 19:46:17,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159820998] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:17,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753194660] [2021-08-06 19:46:17,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:17,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:17,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,641 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-06 19:46:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:17,644 INFO L93 Difference]: Finished difference Result 20 states and 28 transitions. [2021-08-06 19:46:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:17,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-08-06 19:46:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:17,645 INFO L225 Difference]: With dead ends: 20 [2021-08-06 19:46:17,645 INFO L226 Difference]: Without dead ends: 20 [2021-08-06 19:46:17,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-06 19:46:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-06 19:46:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2021-08-06 19:46:17,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2021-08-06 19:46:17,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:17,647 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2021-08-06 19:46:17,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-06 19:46:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2021-08-06 19:46:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:46:17,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:17,647 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:17,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:46:17,647 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:17,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:17,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2095108139, now seen corresponding path program 1 times [2021-08-06 19:46:17,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:17,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4767157] [2021-08-06 19:46:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:17,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:17,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4767157] [2021-08-06 19:46:17,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4767157] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:17,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744645619] [2021-08-06 19:46:17,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:17,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,666 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-06 19:46:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:17,670 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2021-08-06 19:46:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:17,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-08-06 19:46:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:17,671 INFO L225 Difference]: With dead ends: 21 [2021-08-06 19:46:17,672 INFO L226 Difference]: Without dead ends: 21 [2021-08-06 19:46:17,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-06 19:46:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-06 19:46:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2021-08-06 19:46:17,675 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 11 [2021-08-06 19:46:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:17,675 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2021-08-06 19:46:17,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-06 19:46:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2021-08-06 19:46:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:46:17,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:17,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:17,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 19:46:17,677 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1000469992, now seen corresponding path program 1 times [2021-08-06 19:46:17,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:17,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110058392] [2021-08-06 19:46:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:17,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:17,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 70.5 percent of original size [2021-08-06 19:46:17,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 70.5 percent of original size [2021-08-06 19:46:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:17,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110058392] [2021-08-06 19:46:17,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110058392] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:17,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298181857] [2021-08-06 19:46:17,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:17,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,743 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:17,768 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-08-06 19:46:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:17,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 19:46:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:17,769 INFO L225 Difference]: With dead ends: 29 [2021-08-06 19:46:17,769 INFO L226 Difference]: Without dead ends: 29 [2021-08-06 19:46:17,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-06 19:46:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-08-06 19:46:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-08-06 19:46:17,777 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 12 [2021-08-06 19:46:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:17,779 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-08-06 19:46:17,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-08-06 19:46:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:46:17,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:17,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:17,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 19:46:17,780 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1326271753, now seen corresponding path program 1 times [2021-08-06 19:46:17,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:17,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739230933] [2021-08-06 19:46:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:17,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:17,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739230933] [2021-08-06 19:46:17,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739230933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:17,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497010431] [2021-08-06 19:46:17,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:17,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:17,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,806 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:17,818 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-08-06 19:46:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 19:46:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:17,819 INFO L225 Difference]: With dead ends: 29 [2021-08-06 19:46:17,819 INFO L226 Difference]: Without dead ends: 29 [2021-08-06 19:46:17,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-06 19:46:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-08-06 19:46:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-08-06 19:46:17,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-08-06 19:46:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:17,823 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-08-06 19:46:17,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-08-06 19:46:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:46:17,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:17,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:17,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 19:46:17,825 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:17,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2069371544, now seen corresponding path program 1 times [2021-08-06 19:46:17,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:17,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648882667] [2021-08-06 19:46:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:17,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:17,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 86.8 percent of original size [2021-08-06 19:46:17,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 86.8 percent of original size [2021-08-06 19:46:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:17,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648882667] [2021-08-06 19:46:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648882667] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:17,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114343063] [2021-08-06 19:46:17,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:17,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,883 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:17,893 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-08-06 19:46:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 19:46:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:17,893 INFO L225 Difference]: With dead ends: 29 [2021-08-06 19:46:17,893 INFO L226 Difference]: Without dead ends: 29 [2021-08-06 19:46:17,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-06 19:46:17,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2021-08-06 19:46:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-08-06 19:46:17,900 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-08-06 19:46:17,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:17,900 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-08-06 19:46:17,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-08-06 19:46:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:46:17,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:17,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:17,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 19:46:17,901 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1349480247, now seen corresponding path program 1 times [2021-08-06 19:46:17,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:17,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574426113] [2021-08-06 19:46:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:17,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:17,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:17,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574426113] [2021-08-06 19:46:17,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574426113] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:46:17,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:46:17,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:46:17,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364763588] [2021-08-06 19:46:17,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:46:17,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:46:17,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:17,988 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:18,002 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-08-06 19:46:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:46:18,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 19:46:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:18,003 INFO L225 Difference]: With dead ends: 29 [2021-08-06 19:46:18,003 INFO L226 Difference]: Without dead ends: 27 [2021-08-06 19:46:18,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:46:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-06 19:46:18,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-08-06 19:46:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-06 19:46:18,004 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2021-08-06 19:46:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:18,004 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-06 19:46:18,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-06 19:46:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:46:18,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:18,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:18,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 19:46:18,005 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:18,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:18,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2080950938, now seen corresponding path program 1 times [2021-08-06 19:46:18,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:18,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617115480] [2021-08-06 19:46:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:18,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:18,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 81.3 percent of original size [2021-08-06 19:46:18,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 81.3 percent of original size [2021-08-06 19:46:18,094 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 75.9 percent of original size [2021-08-06 19:46:18,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 75.9 percent of original size [2021-08-06 19:46:18,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 133, result has 53.8 percent of original size [2021-08-06 19:46:18,270 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 133, result has 53.8 percent of original size [2021-08-06 19:46:18,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 171, result has 49.7 percent of original size [2021-08-06 19:46:18,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 171, result has 49.7 percent of original size [2021-08-06 19:46:18,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 96, result has 61.4 percent of original size [2021-08-06 19:46:18,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 96, result has 61.4 percent of original size [2021-08-06 19:46:18,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 403, result has 14.8 percent of original size [2021-08-06 19:46:18,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 403, result has 14.8 percent of original size [2021-08-06 19:46:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:18,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:18,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617115480] [2021-08-06 19:46:18,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617115480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:18,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179963797] [2021-08-06 19:46:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:18,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:18,612 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) [2021-08-06 19:46:18,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:46:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:46:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:18,833 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 414, result has 52.1 percent of original size [2021-08-06 19:46:18,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 414, result has 52.1 percent of original size [2021-08-06 19:46:19,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 92.0 percent of original size [2021-08-06 19:46:19,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 92.0 percent of original size [2021-08-06 19:46:19,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 68, result has 62.4 percent of original size [2021-08-06 19:46:19,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 68, result has 62.4 percent of original size [2021-08-06 19:46:19,693 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 978, result has 41.0 percent of original size [2021-08-06 19:46:19,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 978, result has 41.0 percent of original size [2021-08-06 19:46:19,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 97.3 percent of original size [2021-08-06 19:46:19,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 97.3 percent of original size [2021-08-06 19:46:20,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 636 treesize of output 564 [2021-08-06 19:46:20,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 564 treesize of output 472 [2021-08-06 19:46:20,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 47.6 percent of original size [2021-08-06 19:46:20,645 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 47.6 percent of original size [2021-08-06 19:46:20,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 41.2 percent of original size [2021-08-06 19:46:20,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 41.2 percent of original size [2021-08-06 19:46:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:20,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179963797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:20,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:20,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 19:46:20,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459534970] [2021-08-06 19:46:20,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:46:20,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:46:20,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:46:20,803 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:21,467 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-08-06 19:46:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:46:21,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 19:46:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:21,468 INFO L225 Difference]: With dead ends: 26 [2021-08-06 19:46:21,468 INFO L226 Difference]: Without dead ends: 15 [2021-08-06 19:46:21,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 892.0ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:46:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-06 19:46:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-06 19:46:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-06 19:46:21,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2021-08-06 19:46:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:21,470 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-06 19:46:21,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-06 19:46:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:46:21,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:21,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:21,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 19:46:21,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 19:46:21,677 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1057004774, now seen corresponding path program 1 times [2021-08-06 19:46:21,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:21,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516211821] [2021-08-06 19:46:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:21,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:21,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:46:21,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 19:46:21,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 91.5 percent of original size [2021-08-06 19:46:21,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 91.5 percent of original size [2021-08-06 19:46:21,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 91.2 percent of original size [2021-08-06 19:46:21,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 91.2 percent of original size [2021-08-06 19:46:21,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 82.6 percent of original size [2021-08-06 19:46:21,904 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 82.6 percent of original size [2021-08-06 19:46:22,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 89.6 percent of original size [2021-08-06 19:46:22,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 89.6 percent of original size [2021-08-06 19:46:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:22,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:22,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516211821] [2021-08-06 19:46:22,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516211821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:22,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584361421] [2021-08-06 19:46:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:22,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:22,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:22,061 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) [2021-08-06 19:46:22,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:46:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:22,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:46:22,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:22,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1857, result has 14.6 percent of original size [2021-08-06 19:46:22,316 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1857, result has 14.6 percent of original size [2021-08-06 19:46:22,320 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 75, result has 74.2 percent of original size [2021-08-06 19:46:22,337 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 75, result has 74.2 percent of original size [2021-08-06 19:46:22,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 73.7 percent of original size [2021-08-06 19:46:22,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 73.7 percent of original size [2021-08-06 19:46:22,842 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 389, result has 48.8 percent of original size [2021-08-06 19:46:22,893 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 389, result has 48.8 percent of original size [2021-08-06 19:46:22,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 43, result has 86.9 percent of original size [2021-08-06 19:46:22,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 43, result has 86.9 percent of original size [2021-08-06 19:46:23,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 242 [2021-08-06 19:46:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 202 [2021-08-06 19:46:23,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 60.3 percent of original size [2021-08-06 19:46:23,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 60.3 percent of original size [2021-08-06 19:46:23,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:46:23,290 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:46:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:23,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584361421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:23,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:23,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 19:46:23,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525593266] [2021-08-06 19:46:23,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:46:23,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:23,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:46:23,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:46:23,318 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-08-06 19:46:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:23,640 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2021-08-06 19:46:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:46:23,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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 14 [2021-08-06 19:46:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:23,645 INFO L225 Difference]: With dead ends: 25 [2021-08-06 19:46:23,645 INFO L226 Difference]: Without dead ends: 17 [2021-08-06 19:46:23,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:46:23,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-06 19:46:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-08-06 19:46:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-06 19:46:23,647 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2021-08-06 19:46:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:23,647 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-06 19:46:23,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 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) [2021-08-06 19:46:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-06 19:46:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:46:23,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:23,647 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:23,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:23,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 19:46:23,855 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash 88225520, now seen corresponding path program 2 times [2021-08-06 19:46:23,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:23,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940819829] [2021-08-06 19:46:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:23,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:23,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:23,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940819829] [2021-08-06 19:46:23,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940819829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:23,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255882307] [2021-08-06 19:46:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:46:23,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:23,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:23,931 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) [2021-08-06 19:46:23,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:46:24,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:46:24,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:24,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:46:24,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:24,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 92.6 percent of original size [2021-08-06 19:46:24,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 92.6 percent of original size [2021-08-06 19:46:24,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:24,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:24,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 68.5 percent of original size [2021-08-06 19:46:24,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 68.5 percent of original size [2021-08-06 19:46:24,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:46:24,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:46:24,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:24,251 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:24,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255882307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:24,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:24,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-06 19:46:24,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818656538] [2021-08-06 19:46:24,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:46:24,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:46:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:46:24,269 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-08-06 19:46:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:24,294 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-08-06 19:46:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:46:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 [2021-08-06 19:46:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:24,295 INFO L225 Difference]: With dead ends: 17 [2021-08-06 19:46:24,295 INFO L226 Difference]: Without dead ends: 17 [2021-08-06 19:46:24,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:46:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-06 19:46:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-06 19:46:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-08-06 19:46:24,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-08-06 19:46:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:24,297 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-08-06 19:46:24,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2021-08-06 19:46:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-08-06 19:46:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:46:24,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:24,297 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:24,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:24,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:24,501 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash -791597100, now seen corresponding path program 3 times [2021-08-06 19:46:24,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:24,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656953299] [2021-08-06 19:46:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:24,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:24,600 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 26.9 percent of original size [2021-08-06 19:46:24,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 26.9 percent of original size [2021-08-06 19:46:24,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 33, result has 77.2 percent of original size [2021-08-06 19:46:24,633 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 33, result has 77.2 percent of original size [2021-08-06 19:46:24,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 78, result has 54.9 percent of original size [2021-08-06 19:46:24,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 78, result has 54.9 percent of original size [2021-08-06 19:46:24,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 54.4 percent of original size [2021-08-06 19:46:24,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 54.4 percent of original size [2021-08-06 19:46:24,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 92, result has 55.6 percent of original size [2021-08-06 19:46:24,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 92, result has 55.6 percent of original size [2021-08-06 19:46:24,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 39, result has 58.1 percent of original size [2021-08-06 19:46:24,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 39, result has 58.1 percent of original size [2021-08-06 19:46:24,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 146, result has 23.6 percent of original size [2021-08-06 19:46:24,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 146, result has 23.6 percent of original size [2021-08-06 19:46:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:24,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:24,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656953299] [2021-08-06 19:46:24,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656953299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:24,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478669808] [2021-08-06 19:46:24,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:24,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:24,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:24,996 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) [2021-08-06 19:46:24,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:46:25,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 19:46:25,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:25,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 19:46:25,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:25,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 389, result has 40.2 percent of original size [2021-08-06 19:46:25,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 389, result has 40.2 percent of original size [2021-08-06 19:46:25,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 91.6 percent of original size [2021-08-06 19:46:25,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 91.6 percent of original size [2021-08-06 19:46:26,030 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:26,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:26,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 945, result has 28.8 percent of original size [2021-08-06 19:46:26,843 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 945, result has 28.8 percent of original size [2021-08-06 19:46:26,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 93.2 percent of original size [2021-08-06 19:46:26,878 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 93.2 percent of original size [2021-08-06 19:46:26,992 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:26,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 299 [2021-08-06 19:46:27,009 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:27,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 251 [2021-08-06 19:46:27,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:46:27,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:46:27,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 60.3 percent of original size [2021-08-06 19:46:27,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 60.3 percent of original size [2021-08-06 19:46:27,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 48.1 percent of original size [2021-08-06 19:46:27,270 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 48.1 percent of original size [2021-08-06 19:46:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:27,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478669808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:27,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:27,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 19:46:27,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302756934] [2021-08-06 19:46:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:46:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:27,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:46:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:46:27,302 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2021-08-06 19:46:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:27,564 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-06 19:46:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:46:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 16 [2021-08-06 19:46:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:27,565 INFO L225 Difference]: With dead ends: 27 [2021-08-06 19:46:27,565 INFO L226 Difference]: Without dead ends: 18 [2021-08-06 19:46:27,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:46:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-06 19:46:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-06 19:46:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-06 19:46:27,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-08-06 19:46:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:27,566 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-06 19:46:27,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2021-08-06 19:46:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-06 19:46:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:46:27,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:27,567 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:27,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:27,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:27,773 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash 263087658, now seen corresponding path program 4 times [2021-08-06 19:46:27,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:27,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080643202] [2021-08-06 19:46:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:27,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:27,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:46:27,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:46:27,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 72.7 percent of original size [2021-08-06 19:46:27,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 72.7 percent of original size [2021-08-06 19:46:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:27,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:27,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080643202] [2021-08-06 19:46:27,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080643202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:27,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939727112] [2021-08-06 19:46:27,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:46:27,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:27,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:27,898 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) [2021-08-06 19:46:27,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:46:28,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:46:28,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:46:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:28,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:46:28,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:46:28,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:28,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:28,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 69.5 percent of original size [2021-08-06 19:46:28,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 69.5 percent of original size [2021-08-06 19:46:28,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2021-08-06 19:46:28,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2021-08-06 19:46:28,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:28,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:28,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939727112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:28,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:28,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-06 19:46:28,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967884050] [2021-08-06 19:46:28,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:46:28,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:46:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:46:28,501 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:28,559 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-06 19:46:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:46:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:46:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:28,559 INFO L225 Difference]: With dead ends: 19 [2021-08-06 19:46:28,559 INFO L226 Difference]: Without dead ends: 19 [2021-08-06 19:46:28,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:46:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-06 19:46:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-06 19:46:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-06 19:46:28,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2021-08-06 19:46:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:28,561 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-06 19:46:28,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-06 19:46:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:46:28,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:28,561 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:28,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:28,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 19:46:28,762 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash 334161882, now seen corresponding path program 5 times [2021-08-06 19:46:28,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:28,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255098021] [2021-08-06 19:46:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:28,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:28,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 88.7 percent of original size [2021-08-06 19:46:28,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 88.7 percent of original size [2021-08-06 19:46:28,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 82.2 percent of original size [2021-08-06 19:46:28,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 82.2 percent of original size [2021-08-06 19:46:29,012 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 91.5 percent of original size [2021-08-06 19:46:29,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 91.5 percent of original size [2021-08-06 19:46:29,096 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 89.4 percent of original size [2021-08-06 19:46:29,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 89.4 percent of original size [2021-08-06 19:46:29,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 85.1 percent of original size [2021-08-06 19:46:29,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 85.1 percent of original size [2021-08-06 19:46:29,212 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 119, result has 21.2 percent of original size [2021-08-06 19:46:29,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 119, result has 21.2 percent of original size [2021-08-06 19:46:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:29,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:29,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255098021] [2021-08-06 19:46:29,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255098021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:29,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956906830] [2021-08-06 19:46:29,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:46:29,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:29,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:29,249 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) [2021-08-06 19:46:29,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:46:29,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:46:29,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:29,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:46:29,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:29,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 124, result has 66.6 percent of original size [2021-08-06 19:46:29,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 124, result has 66.6 percent of original size [2021-08-06 19:46:30,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:30,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:31,510 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2020, result has 17.5 percent of original size [2021-08-06 19:46:31,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2020, result has 17.5 percent of original size [2021-08-06 19:46:31,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 78.6 percent of original size [2021-08-06 19:46:31,645 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 78.6 percent of original size [2021-08-06 19:46:31,756 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:31,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 321 treesize of output 280 [2021-08-06 19:46:31,769 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:31,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 277 treesize of output 236 [2021-08-06 19:46:31,919 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 63.6 percent of original size [2021-08-06 19:46:31,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 63.6 percent of original size [2021-08-06 19:46:32,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:46:32,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:46:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:32,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956906830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:32,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:32,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-06 19:46:32,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559720537] [2021-08-06 19:46:32,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:46:32,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:46:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:46:32,056 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:32,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:32,297 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-08-06 19:46:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:46:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:46:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:32,298 INFO L225 Difference]: With dead ends: 31 [2021-08-06 19:46:32,298 INFO L226 Difference]: Without dead ends: 21 [2021-08-06 19:46:32,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:46:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-06 19:46:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-08-06 19:46:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2021-08-06 19:46:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-06 19:46:32,301 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2021-08-06 19:46:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:32,301 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-06 19:46:32,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-06 19:46:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:46:32,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:32,302 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:32,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:32,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 19:46:32,520 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash 273932464, now seen corresponding path program 6 times [2021-08-06 19:46:32,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:32,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482803007] [2021-08-06 19:46:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:32,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:32,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:32,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482803007] [2021-08-06 19:46:32,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482803007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:32,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880634714] [2021-08-06 19:46:32,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:46:32,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:32,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:32,677 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) [2021-08-06 19:46:32,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:46:33,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:46:33,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:33,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:46:33,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:33,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:46:33,155 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:46:33,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:33,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:33,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:46:33,290 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:46:33,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:46:33,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:46:33,328 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:33,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:33,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880634714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:33,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:33,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-06 19:46:33,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290027135] [2021-08-06 19:46:33,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:46:33,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:46:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:46:33,344 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:33,414 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-08-06 19:46:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:46:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:46:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:33,415 INFO L225 Difference]: With dead ends: 21 [2021-08-06 19:46:33,415 INFO L226 Difference]: Without dead ends: 21 [2021-08-06 19:46:33,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:46:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-06 19:46:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-06 19:46:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-06 19:46:33,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-08-06 19:46:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:33,416 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-06 19:46:33,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:33,416 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-06 19:46:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:46:33,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:33,417 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:33,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:33,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:33,617 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash 670350868, now seen corresponding path program 7 times [2021-08-06 19:46:33,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:33,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598260521] [2021-08-06 19:46:33,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:33,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:33,694 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 92.2 percent of original size [2021-08-06 19:46:33,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 92.2 percent of original size [2021-08-06 19:46:33,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 57.2 percent of original size [2021-08-06 19:46:33,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 57.2 percent of original size [2021-08-06 19:46:33,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 79, result has 61.3 percent of original size [2021-08-06 19:46:33,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 79, result has 61.3 percent of original size [2021-08-06 19:46:33,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 184, result has 45.2 percent of original size [2021-08-06 19:46:33,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 184, result has 45.2 percent of original size [2021-08-06 19:46:34,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 184, result has 45.2 percent of original size [2021-08-06 19:46:34,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 184, result has 45.2 percent of original size [2021-08-06 19:46:34,146 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 180, result has 41.2 percent of original size [2021-08-06 19:46:34,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 180, result has 41.2 percent of original size [2021-08-06 19:46:34,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 131, result has 45.2 percent of original size [2021-08-06 19:46:34,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 131, result has 45.2 percent of original size [2021-08-06 19:46:34,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 73.2 percent of original size [2021-08-06 19:46:34,341 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 73.2 percent of original size [2021-08-06 19:46:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:34,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:34,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598260521] [2021-08-06 19:46:34,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598260521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:34,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412759972] [2021-08-06 19:46:34,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:46:34,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:34,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:34,379 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) [2021-08-06 19:46:34,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:46:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:34,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:46:34,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:34,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 372, result has 36.7 percent of original size [2021-08-06 19:46:34,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 372, result has 36.7 percent of original size [2021-08-06 19:46:34,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 87.8 percent of original size [2021-08-06 19:46:34,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 87.8 percent of original size [2021-08-06 19:46:35,030 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 81.4 percent of original size [2021-08-06 19:46:35,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 81.4 percent of original size [2021-08-06 19:46:35,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 365, result has 47.9 percent of original size [2021-08-06 19:46:35,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 365, result has 47.9 percent of original size [2021-08-06 19:46:35,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 90.0 percent of original size [2021-08-06 19:46:35,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 90.0 percent of original size [2021-08-06 19:46:35,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 240 [2021-08-06 19:46:35,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 200 [2021-08-06 19:46:35,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 62.5 percent of original size [2021-08-06 19:46:35,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 62.5 percent of original size [2021-08-06 19:46:35,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:46:35,940 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:46:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:35,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412759972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:35,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:35,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 19:46:35,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610186245] [2021-08-06 19:46:35,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:46:35,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:35,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:46:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:46:35,966 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2021-08-06 19:46:36,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:36,756 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-08-06 19:46:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:46:36,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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 20 [2021-08-06 19:46:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:36,757 INFO L225 Difference]: With dead ends: 40 [2021-08-06 19:46:36,757 INFO L226 Difference]: Without dead ends: 36 [2021-08-06 19:46:36,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1300.9ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:46:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-06 19:46:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2021-08-06 19:46:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-08-06 19:46:36,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2021-08-06 19:46:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:36,758 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-06 19:46:36,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 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) [2021-08-06 19:46:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-08-06 19:46:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:46:36,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:36,759 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:36,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:36,960 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,SelfDestructingSolverStorable16 [2021-08-06 19:46:36,961 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash 74419504, now seen corresponding path program 8 times [2021-08-06 19:46:36,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:36,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778138197] [2021-08-06 19:46:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:36,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:37,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:37,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778138197] [2021-08-06 19:46:37,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778138197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:37,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624994628] [2021-08-06 19:46:37,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:46:37,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:37,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:37,149 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) [2021-08-06 19:46:37,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:46:37,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:46:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:37,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:46:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:37,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:46:37,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:46:37,842 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:37,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:38,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2021-08-06 19:46:38,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-08-06 19:46:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:38,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624994628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:38,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:38,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-08-06 19:46:38,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183185803] [2021-08-06 19:46:38,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:46:38,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:38,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:46:38,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:46:38,082 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:38,303 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-06 19:46:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:46:38,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:46:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:38,304 INFO L225 Difference]: With dead ends: 29 [2021-08-06 19:46:38,304 INFO L226 Difference]: Without dead ends: 22 [2021-08-06 19:46:38,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:46:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-06 19:46:38,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-06 19:46:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 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) [2021-08-06 19:46:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-06 19:46:38,309 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2021-08-06 19:46:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:38,309 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-06 19:46:38,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-06 19:46:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:46:38,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:38,310 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:38,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:38,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 19:46:38,526 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:38,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:38,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1375544982, now seen corresponding path program 9 times [2021-08-06 19:46:38,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:38,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281400673] [2021-08-06 19:46:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:38,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:38,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:38,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281400673] [2021-08-06 19:46:38,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281400673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:38,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814452036] [2021-08-06 19:46:38,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:38,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:38,720 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) [2021-08-06 19:46:38,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:46:39,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:46:39,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:39,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:46:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:39,300 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:46:39,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:46:39,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:39,323 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:39,467 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:46:39,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:46:39,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:46:39,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:46:39,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:39,503 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:39,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814452036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:39,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:39,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-08-06 19:46:39,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959798915] [2021-08-06 19:46:39,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:46:39,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:39,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:46:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:46:39,520 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:39,604 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-08-06 19:46:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:46:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:46:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:39,604 INFO L225 Difference]: With dead ends: 23 [2021-08-06 19:46:39,604 INFO L226 Difference]: Without dead ends: 23 [2021-08-06 19:46:39,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:46:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-06 19:46:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-06 19:46:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-08-06 19:46:39,605 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2021-08-06 19:46:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:39,605 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-08-06 19:46:39,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-08-06 19:46:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:46:39,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:39,606 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:39,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:39,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:39,809 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1076157594, now seen corresponding path program 10 times [2021-08-06 19:46:39,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:39,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203682347] [2021-08-06 19:46:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:39,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:39,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 61.5 percent of original size [2021-08-06 19:46:39,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 61.5 percent of original size [2021-08-06 19:46:39,943 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 135, result has 45.8 percent of original size [2021-08-06 19:46:39,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 135, result has 45.8 percent of original size [2021-08-06 19:46:40,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 135, result has 45.1 percent of original size [2021-08-06 19:46:40,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 135, result has 45.1 percent of original size [2021-08-06 19:46:40,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 194, result has 39.4 percent of original size [2021-08-06 19:46:40,107 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 194, result has 39.4 percent of original size [2021-08-06 19:46:40,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 214, result has 35.3 percent of original size [2021-08-06 19:46:40,215 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 214, result has 35.3 percent of original size [2021-08-06 19:46:40,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 214, result has 35.3 percent of original size [2021-08-06 19:46:40,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 214, result has 35.3 percent of original size [2021-08-06 19:46:40,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 214, result has 35.3 percent of original size [2021-08-06 19:46:40,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 214, result has 35.3 percent of original size [2021-08-06 19:46:40,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 229, result has 35.9 percent of original size [2021-08-06 19:46:40,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 229, result has 35.9 percent of original size [2021-08-06 19:46:40,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 82.0 percent of original size [2021-08-06 19:46:40,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 82.0 percent of original size [2021-08-06 19:46:40,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 88.5 percent of original size [2021-08-06 19:46:40,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 88.5 percent of original size [2021-08-06 19:46:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:40,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:40,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203682347] [2021-08-06 19:46:40,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203682347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:40,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733990418] [2021-08-06 19:46:40,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:46:40,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:40,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:40,695 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) [2021-08-06 19:46:40,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:46:41,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:46:41,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-06 19:46:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:41,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 945, result has 23.2 percent of original size [2021-08-06 19:46:41,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 945, result has 23.2 percent of original size [2021-08-06 19:46:41,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 73.7 percent of original size [2021-08-06 19:46:41,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 73.7 percent of original size [2021-08-06 19:46:42,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 124, result has 74.2 percent of original size [2021-08-06 19:46:42,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 124, result has 74.2 percent of original size [2021-08-06 19:46:42,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 237 [2021-08-06 19:46:42,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 205 [2021-08-06 19:46:42,656 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 63.6 percent of original size [2021-08-06 19:46:42,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 63.6 percent of original size [2021-08-06 19:46:42,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 42.4 percent of original size [2021-08-06 19:46:42,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 42.4 percent of original size [2021-08-06 19:46:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:42,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733990418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:42,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:42,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-06 19:46:42,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390130195] [2021-08-06 19:46:42,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:46:42,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:42,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:46:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:46:42,791 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:44,202 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-08-06 19:46:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:46:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:46:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:44,202 INFO L225 Difference]: With dead ends: 37 [2021-08-06 19:46:44,202 INFO L226 Difference]: Without dead ends: 25 [2021-08-06 19:46:44,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2040.3ms TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:46:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-06 19:46:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-08-06 19:46:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-06 19:46:44,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2021-08-06 19:46:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:44,204 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-06 19:46:44,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-06 19:46:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:44,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:44,204 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:44,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-06 19:46:44,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:44,421 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2065267312, now seen corresponding path program 11 times [2021-08-06 19:46:44,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:44,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562187282] [2021-08-06 19:46:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:44,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:44,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:46:44,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 19:46:44,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 74.1 percent of original size [2021-08-06 19:46:44,633 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 74.1 percent of original size [2021-08-06 19:46:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:44,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:44,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562187282] [2021-08-06 19:46:44,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562187282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:44,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349868968] [2021-08-06 19:46:44,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:46:44,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:44,673 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) [2021-08-06 19:46:44,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:46:45,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:46:45,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:45,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 19:46:45,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:45,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 92.6 percent of original size [2021-08-06 19:46:45,291 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 92.6 percent of original size [2021-08-06 19:46:45,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:45,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:45,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 68.5 percent of original size [2021-08-06 19:46:45,451 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 68.5 percent of original size [2021-08-06 19:46:45,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:46:45,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:46:45,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:45,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:45,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349868968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:45,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:45,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-06 19:46:45,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489149093] [2021-08-06 19:46:45,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:46:45,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:45,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:46:45,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:46:45,499 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2021-08-06 19:46:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:45,600 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-06 19:46:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:46:45,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 [2021-08-06 19:46:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:45,601 INFO L225 Difference]: With dead ends: 25 [2021-08-06 19:46:45,601 INFO L226 Difference]: Without dead ends: 25 [2021-08-06 19:46:45,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:46:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-06 19:46:45,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-06 19:46:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-08-06 19:46:45,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2021-08-06 19:46:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:45,603 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-08-06 19:46:45,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2021-08-06 19:46:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-08-06 19:46:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 19:46:45,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:45,603 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:45,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-06 19:46:45,804 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,SelfDestructingSolverStorable20 [2021-08-06 19:46:45,805 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash 367156308, now seen corresponding path program 12 times [2021-08-06 19:46:45,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:45,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098963415] [2021-08-06 19:46:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:45,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:45,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 73.2 percent of original size [2021-08-06 19:46:45,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 73.2 percent of original size [2021-08-06 19:46:45,975 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 67.4 percent of original size [2021-08-06 19:46:45,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 67.4 percent of original size [2021-08-06 19:46:46,037 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 66.7 percent of original size [2021-08-06 19:46:46,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 66.7 percent of original size [2021-08-06 19:46:46,108 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 68.3 percent of original size [2021-08-06 19:46:46,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 68.3 percent of original size [2021-08-06 19:46:46,185 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 68.3 percent of original size [2021-08-06 19:46:46,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 68.3 percent of original size [2021-08-06 19:46:46,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 68.3 percent of original size [2021-08-06 19:46:46,274 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 68.3 percent of original size [2021-08-06 19:46:46,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 58, result has 68.3 percent of original size [2021-08-06 19:46:46,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 58, result has 68.3 percent of original size [2021-08-06 19:46:46,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 68.7 percent of original size [2021-08-06 19:46:46,437 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 68.7 percent of original size [2021-08-06 19:46:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:46,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:46,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098963415] [2021-08-06 19:46:46,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098963415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:46,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886264598] [2021-08-06 19:46:46,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:46:46,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:46,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:46,601 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) [2021-08-06 19:46:46,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:46:47,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:46:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 19:46:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:47,244 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 383, result has 39.7 percent of original size [2021-08-06 19:46:47,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 383, result has 39.7 percent of original size [2021-08-06 19:46:49,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 386, result has 50.1 percent of original size [2021-08-06 19:46:49,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 386, result has 50.1 percent of original size [2021-08-06 19:46:49,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 89.2 percent of original size [2021-08-06 19:46:49,648 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 89.2 percent of original size [2021-08-06 19:46:49,754 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:49,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 310 treesize of output 273 [2021-08-06 19:46:49,764 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:46:49,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 270 treesize of output 229 [2021-08-06 19:46:49,891 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 62.5 percent of original size [2021-08-06 19:46:49,894 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 62.5 percent of original size [2021-08-06 19:46:49,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:46:50,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:46:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:50,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886264598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:50,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:50,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-08-06 19:46:50,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940641583] [2021-08-06 19:46:50,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:46:50,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:46:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:46:50,035 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:51,233 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-08-06 19:46:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:46:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 19:46:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:51,236 INFO L225 Difference]: With dead ends: 46 [2021-08-06 19:46:51,236 INFO L226 Difference]: Without dead ends: 42 [2021-08-06 19:46:51,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1631.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:46:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-06 19:46:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-08-06 19:46:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-08-06 19:46:51,237 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-08-06 19:46:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:51,238 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-08-06 19:46:51,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-08-06 19:46:51,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:46:51,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:51,238 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:51,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:51,447 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,SelfDestructingSolverStorable21 [2021-08-06 19:46:51,448 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:51,448 INFO L82 PathProgramCache]: Analyzing trace with hash -734677264, now seen corresponding path program 13 times [2021-08-06 19:46:51,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:51,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14464599] [2021-08-06 19:46:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:51,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:51,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:51,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14464599] [2021-08-06 19:46:51,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14464599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:51,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880710280] [2021-08-06 19:46:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:46:51,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:51,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:51,711 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) [2021-08-06 19:46:51,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:46:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:52,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:46:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:52,434 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:46:52,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:46:52,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:52,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:52,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2021-08-06 19:46:52,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-08-06 19:46:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:52,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880710280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:52,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:52,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2021-08-06 19:46:52,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999908745] [2021-08-06 19:46:52,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:46:52,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:46:52,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:46:52,943 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-08-06 19:46:53,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:53,230 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-06 19:46:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:46:53,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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 25 [2021-08-06 19:46:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:53,231 INFO L225 Difference]: With dead ends: 35 [2021-08-06 19:46:53,231 INFO L226 Difference]: Without dead ends: 26 [2021-08-06 19:46:53,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:46:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-06 19:46:53,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-06 19:46:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-08-06 19:46:53,232 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2021-08-06 19:46:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:53,233 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-08-06 19:46:53,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-08-06 19:46:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-08-06 19:46:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:46:53,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:53,233 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:53,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:53,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:53,449 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1713822890, now seen corresponding path program 14 times [2021-08-06 19:46:53,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:53,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560043479] [2021-08-06 19:46:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:53,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:53,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:53,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560043479] [2021-08-06 19:46:53,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560043479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:53,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137044744] [2021-08-06 19:46:53,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:46:53,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:53,746 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) [2021-08-06 19:46:53,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:46:54,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:46:54,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:54,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:46:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:54,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:54,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:46:54,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:46:54,835 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:46:54,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:46:54,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:46:54,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:54,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:46:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:54,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137044744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:54,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:54,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 22 [2021-08-06 19:46:54,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374016136] [2021-08-06 19:46:54,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:46:54,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:46:54,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:46:54,884 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:55,018 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-06 19:46:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:46:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:46:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:55,019 INFO L225 Difference]: With dead ends: 27 [2021-08-06 19:46:55,019 INFO L226 Difference]: Without dead ends: 27 [2021-08-06 19:46:55,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:46:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-06 19:46:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-06 19:46:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-06 19:46:55,020 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2021-08-06 19:46:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:55,020 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-06 19:46:55,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-06 19:46:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:46:55,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:55,021 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:55,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:55,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:55,233 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1937686182, now seen corresponding path program 15 times [2021-08-06 19:46:55,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:55,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869468584] [2021-08-06 19:46:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:55,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:55,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 139, result has 45.1 percent of original size [2021-08-06 19:46:55,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 139, result has 45.1 percent of original size [2021-08-06 19:46:55,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 163, result has 39.4 percent of original size [2021-08-06 19:46:55,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 163, result has 39.4 percent of original size [2021-08-06 19:46:55,532 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 138, result has 44.4 percent of original size [2021-08-06 19:46:55,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 138, result has 44.4 percent of original size [2021-08-06 19:46:55,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:55,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:55,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:55,735 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:55,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:55,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:55,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:55,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:56,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:56,058 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 109, result has 62.9 percent of original size [2021-08-06 19:46:56,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 91, result has 62.4 percent of original size [2021-08-06 19:46:56,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 91, result has 62.4 percent of original size [2021-08-06 19:46:56,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 66.0 percent of original size [2021-08-06 19:46:56,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 66.0 percent of original size [2021-08-06 19:46:56,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 64.6 percent of original size [2021-08-06 19:46:56,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 64.6 percent of original size [2021-08-06 19:46:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:56,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:56,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869468584] [2021-08-06 19:46:56,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869468584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:56,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941172223] [2021-08-06 19:46:56,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:56,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:56,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:56,367 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) [2021-08-06 19:46:56,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:46:57,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:46:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 19:46:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:57,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 917, result has 26.9 percent of original size [2021-08-06 19:46:57,262 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 917, result has 26.9 percent of original size [2021-08-06 19:46:57,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 91.6 percent of original size [2021-08-06 19:46:57,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 91.6 percent of original size [2021-08-06 19:46:57,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:58,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:46:59,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 950, result has 30.0 percent of original size [2021-08-06 19:46:59,200 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 950, result has 30.0 percent of original size [2021-08-06 19:46:59,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 303 [2021-08-06 19:46:59,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 259 [2021-08-06 19:46:59,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 60.3 percent of original size [2021-08-06 19:46:59,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 60.3 percent of original size [2021-08-06 19:46:59,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 43.3 percent of original size [2021-08-06 19:46:59,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 43.3 percent of original size [2021-08-06 19:46:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941172223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:59,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:59,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 28 [2021-08-06 19:46:59,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394544343] [2021-08-06 19:46:59,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:46:59,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:59,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:46:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:46:59,706 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:00,758 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-08-06 19:47:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:47:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:47:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:00,759 INFO L225 Difference]: With dead ends: 42 [2021-08-06 19:47:00,759 INFO L226 Difference]: Without dead ends: 28 [2021-08-06 19:47:00,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1797.8ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:47:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-06 19:47:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-06 19:47:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-08-06 19:47:00,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2021-08-06 19:47:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:00,761 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-08-06 19:47:00,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-08-06 19:47:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 19:47:00,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:00,761 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:00,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:00,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-06 19:47:00,965 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash -576256976, now seen corresponding path program 16 times [2021-08-06 19:47:00,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:00,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132346196] [2021-08-06 19:47:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:00,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:01,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:01,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132346196] [2021-08-06 19:47:01,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132346196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:01,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344616119] [2021-08-06 19:47:01,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:47:01,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:01,323 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) [2021-08-06 19:47:01,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:47:02,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:47:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:02,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 19:47:02,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:02,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:47:02,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:47:02,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:02,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:02,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:02,610 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:02,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:47:02,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:47:02,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:02,642 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:02,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344616119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:02,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:02,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 25 [2021-08-06 19:47:02,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602838910] [2021-08-06 19:47:02,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:47:02,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:02,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:47:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:47:02,658 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2021-08-06 19:47:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:02,854 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-06 19:47:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:47:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 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 27 [2021-08-06 19:47:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:02,855 INFO L225 Difference]: With dead ends: 29 [2021-08-06 19:47:02,855 INFO L226 Difference]: Without dead ends: 29 [2021-08-06 19:47:02,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:47:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-06 19:47:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-06 19:47:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-08-06 19:47:02,856 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2021-08-06 19:47:02,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:02,856 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-08-06 19:47:02,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2021-08-06 19:47:02,857 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-08-06 19:47:02,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:47:02,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:02,857 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:02,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:03,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 19:47:03,073 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash 84282004, now seen corresponding path program 17 times [2021-08-06 19:47:03,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:03,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254726650] [2021-08-06 19:47:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:03,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:03,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 90.7 percent of original size [2021-08-06 19:47:03,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 90.7 percent of original size [2021-08-06 19:47:03,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 90.1 percent of original size [2021-08-06 19:47:03,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 90.1 percent of original size [2021-08-06 19:47:03,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 83.1 percent of original size [2021-08-06 19:47:03,346 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 83.1 percent of original size [2021-08-06 19:47:03,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,507 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,608 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,689 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,699 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:03,921 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 90.1 percent of original size [2021-08-06 19:47:04,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 90.8 percent of original size [2021-08-06 19:47:04,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 90.8 percent of original size [2021-08-06 19:47:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:04,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:04,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254726650] [2021-08-06 19:47:04,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254726650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:04,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247604818] [2021-08-06 19:47:04,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:47:04,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:04,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:04,194 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) [2021-08-06 19:47:04,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:47:05,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:47:05,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:47:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:05,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 889, result has 26.6 percent of original size [2021-08-06 19:47:05,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 889, result has 26.6 percent of original size [2021-08-06 19:47:05,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 91.6 percent of original size [2021-08-06 19:47:05,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 91.6 percent of original size [2021-08-06 19:47:05,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:05,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:07,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 900, result has 27.4 percent of original size [2021-08-06 19:47:07,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 900, result has 27.4 percent of original size [2021-08-06 19:47:07,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 266 [2021-08-06 19:47:07,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 226 [2021-08-06 19:47:07,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 63.6 percent of original size [2021-08-06 19:47:07,463 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 63.6 percent of original size [2021-08-06 19:47:07,572 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:47:07,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:47:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:07,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247604818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:07,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:07,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 31 [2021-08-06 19:47:07,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196586564] [2021-08-06 19:47:07,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:47:07,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:47:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:47:07,604 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:08,584 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-08-06 19:47:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:47:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 19:47:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:08,585 INFO L225 Difference]: With dead ends: 45 [2021-08-06 19:47:08,585 INFO L226 Difference]: Without dead ends: 30 [2021-08-06 19:47:08,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1809.4ms TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:47:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-06 19:47:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-06 19:47:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-06 19:47:08,587 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2021-08-06 19:47:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:08,587 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-06 19:47:08,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-06 19:47:08,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:47:08,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:08,587 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:08,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:08,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 19:47:08,805 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1547276310, now seen corresponding path program 18 times [2021-08-06 19:47:08,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:08,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397175339] [2021-08-06 19:47:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:08,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:09,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:09,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397175339] [2021-08-06 19:47:09,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397175339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:09,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539066954] [2021-08-06 19:47:09,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:47:09,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:09,162 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) [2021-08-06 19:47:09,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:47:10,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:47:10,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:47:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:10,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:10,351 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:10,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:10,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:10,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:47:10,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:47:10,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:10,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:10,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539066954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:10,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:10,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2021-08-06 19:47:10,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137656811] [2021-08-06 19:47:10,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:47:10,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:47:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:47:10,776 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:11,002 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-06 19:47:11,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:47:11,002 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:47:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:11,002 INFO L225 Difference]: With dead ends: 31 [2021-08-06 19:47:11,003 INFO L226 Difference]: Without dead ends: 31 [2021-08-06 19:47:11,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:47:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-06 19:47:11,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-06 19:47:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-08-06 19:47:11,004 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2021-08-06 19:47:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:11,004 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-08-06 19:47:11,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-08-06 19:47:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 19:47:11,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:11,004 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:11,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:11,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:11,213 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:11,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:11,214 INFO L82 PathProgramCache]: Analyzing trace with hash 47453722, now seen corresponding path program 19 times [2021-08-06 19:47:11,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:11,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764640806] [2021-08-06 19:47:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:11,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:11,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 95.3 percent of original size [2021-08-06 19:47:11,442 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 95.3 percent of original size [2021-08-06 19:47:11,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 84.6 percent of original size [2021-08-06 19:47:11,513 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 84.6 percent of original size [2021-08-06 19:47:11,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,665 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,811 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,817 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:11,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:12,062 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:12,068 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 96.4 percent of original size [2021-08-06 19:47:12,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 5, result has 95.4 percent of original size [2021-08-06 19:47:12,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 5, result has 95.4 percent of original size [2021-08-06 19:47:12,224 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 67.3 percent of original size [2021-08-06 19:47:12,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 67.3 percent of original size [2021-08-06 19:47:12,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 53.7 percent of original size [2021-08-06 19:47:12,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 53.7 percent of original size [2021-08-06 19:47:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:12,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:12,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764640806] [2021-08-06 19:47:12,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764640806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:12,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378615883] [2021-08-06 19:47:12,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:47:12,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:12,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:12,322 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:47:12,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:47:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:13,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 19:47:13,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:13,439 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1953, result has 12.9 percent of original size [2021-08-06 19:47:13,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1953, result has 12.9 percent of original size [2021-08-06 19:47:14,130 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:14,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:16,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 124, result has 73.4 percent of original size [2021-08-06 19:47:16,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 124, result has 73.4 percent of original size [2021-08-06 19:47:16,577 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 92.4 percent of original size [2021-08-06 19:47:16,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 92.4 percent of original size [2021-08-06 19:47:16,719 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:16,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 299 treesize of output 258 [2021-08-06 19:47:16,728 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:16,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 255 treesize of output 222 [2021-08-06 19:47:16,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 60.3 percent of original size [2021-08-06 19:47:16,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 60.3 percent of original size [2021-08-06 19:47:16,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 42.4 percent of original size [2021-08-06 19:47:16,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 42.4 percent of original size [2021-08-06 19:47:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:16,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378615883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:16,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:16,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2021-08-06 19:47:16,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790282564] [2021-08-06 19:47:16,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 19:47:16,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 19:47:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:47:16,993 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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) [2021-08-06 19:47:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:17,736 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-08-06 19:47:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:47:17,736 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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 30 [2021-08-06 19:47:17,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:17,737 INFO L225 Difference]: With dead ends: 49 [2021-08-06 19:47:17,737 INFO L226 Difference]: Without dead ends: 33 [2021-08-06 19:47:17,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1455.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 19:47:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-06 19:47:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-08-06 19:47:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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) [2021-08-06 19:47:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-08-06 19:47:17,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2021-08-06 19:47:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:17,739 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-08-06 19:47:17,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 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) [2021-08-06 19:47:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-08-06 19:47:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:47:17,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:17,739 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:17,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:17,954 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,SelfDestructingSolverStorable28 [2021-08-06 19:47:17,954 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash -217022992, now seen corresponding path program 20 times [2021-08-06 19:47:17,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:17,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326280339] [2021-08-06 19:47:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:17,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:18,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:18,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326280339] [2021-08-06 19:47:18,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326280339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:18,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242023031] [2021-08-06 19:47:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:47:18,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:18,399 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) [2021-08-06 19:47:18,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:47:19,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:47:19,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:19,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 19:47:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:19,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:47:19,679 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:47:19,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:19,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:20,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:20,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:20,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:47:20,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:47:20,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:20,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:20,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242023031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:20,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:20,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 31 [2021-08-06 19:47:20,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848326110] [2021-08-06 19:47:20,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:47:20,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:20,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:47:20,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:47:20,208 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:20,466 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-08-06 19:47:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:47:20,466 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:47:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:20,466 INFO L225 Difference]: With dead ends: 33 [2021-08-06 19:47:20,466 INFO L226 Difference]: Without dead ends: 33 [2021-08-06 19:47:20,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:47:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-06 19:47:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-06 19:47:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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) [2021-08-06 19:47:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-06 19:47:20,468 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2021-08-06 19:47:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:20,468 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-06 19:47:20,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:20,468 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-06 19:47:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:47:20,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:20,468 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:20,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:20,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:20,669 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:20,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1664366380, now seen corresponding path program 21 times [2021-08-06 19:47:20,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:20,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31929584] [2021-08-06 19:47:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:20,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:20,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 77.4 percent of original size [2021-08-06 19:47:20,817 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 77.4 percent of original size [2021-08-06 19:47:20,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 75.8 percent of original size [2021-08-06 19:47:20,898 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 75.8 percent of original size [2021-08-06 19:47:20,965 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 71.9 percent of original size [2021-08-06 19:47:20,972 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 71.9 percent of original size [2021-08-06 19:47:21,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,211 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,451 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 75.2 percent of original size [2021-08-06 19:47:21,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 76.4 percent of original size [2021-08-06 19:47:21,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 76.4 percent of original size [2021-08-06 19:47:21,833 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 117, result has 19.9 percent of original size [2021-08-06 19:47:21,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 117, result has 19.9 percent of original size [2021-08-06 19:47:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:21,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:21,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31929584] [2021-08-06 19:47:21,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31929584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:21,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438755934] [2021-08-06 19:47:21,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:47:21,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:21,880 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) [2021-08-06 19:47:21,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:47:23,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:47:23,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:23,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-06 19:47:23,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:23,378 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 375, result has 42.7 percent of original size [2021-08-06 19:47:23,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 375, result has 42.7 percent of original size [2021-08-06 19:47:23,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 47, result has 71.3 percent of original size [2021-08-06 19:47:23,657 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 47, result has 71.3 percent of original size [2021-08-06 19:47:23,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 121, result has 70.1 percent of original size [2021-08-06 19:47:23,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 121, result has 70.1 percent of original size [2021-08-06 19:47:23,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 90.8 percent of original size [2021-08-06 19:47:24,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 90.8 percent of original size [2021-08-06 19:47:25,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 124, result has 73.3 percent of original size [2021-08-06 19:47:25,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 124, result has 73.3 percent of original size [2021-08-06 19:47:25,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 223 [2021-08-06 19:47:25,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 191 [2021-08-06 19:47:25,397 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:47:25,400 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 61.1 percent of original size [2021-08-06 19:47:25,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 64.6 percent of original size [2021-08-06 19:47:25,480 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 64.6 percent of original size [2021-08-06 19:47:25,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 42.4 percent of original size [2021-08-06 19:47:25,596 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 42.4 percent of original size [2021-08-06 19:47:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:25,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438755934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:25,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:25,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2021-08-06 19:47:25,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070398977] [2021-08-06 19:47:25,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-06 19:47:25,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-06 19:47:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 19:47:25,622 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:27,157 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-08-06 19:47:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:47:27,158 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:47:27,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:27,158 INFO L225 Difference]: With dead ends: 51 [2021-08-06 19:47:27,158 INFO L226 Difference]: Without dead ends: 34 [2021-08-06 19:47:27,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 2867.8ms TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 19:47:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-06 19:47:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-06 19:47:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-08-06 19:47:27,160 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2021-08-06 19:47:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:27,160 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-08-06 19:47:27,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-08-06 19:47:27,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:47:27,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:27,160 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:27,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 19:47:27,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:27,365 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1871549226, now seen corresponding path program 22 times [2021-08-06 19:47:27,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:27,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328719311] [2021-08-06 19:47:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:27,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:27,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:27,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328719311] [2021-08-06 19:47:27,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328719311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:27,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834997136] [2021-08-06 19:47:27,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:47:27,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:27,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:27,837 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) [2021-08-06 19:47:27,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:47:29,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:47:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:29,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 19:47:29,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:29,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:47:29,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 2, result has 94.1 percent of original size [2021-08-06 19:47:29,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:29,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:29,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:29,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:29,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:47:29,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:47:29,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:29,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:29,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834997136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:29,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:29,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 34 [2021-08-06 19:47:29,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137405767] [2021-08-06 19:47:29,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 19:47:29,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:29,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 19:47:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:47:29,792 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:30,071 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-06 19:47:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:47:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 19:47:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:30,072 INFO L225 Difference]: With dead ends: 35 [2021-08-06 19:47:30,072 INFO L226 Difference]: Without dead ends: 35 [2021-08-06 19:47:30,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 612.8ms TimeCoverageRelationStatistics Valid=107, Invalid=1153, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:47:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-06 19:47:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-06 19:47:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-08-06 19:47:30,073 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2021-08-06 19:47:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:30,073 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-08-06 19:47:30,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-08-06 19:47:30,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 19:47:30,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:30,074 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:30,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:30,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:30,274 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:30,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1343137062, now seen corresponding path program 23 times [2021-08-06 19:47:30,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:30,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511471896] [2021-08-06 19:47:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:30,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:30,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 51, result has 69.5 percent of original size [2021-08-06 19:47:30,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 51, result has 69.5 percent of original size [2021-08-06 19:47:30,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 73, result has 58.5 percent of original size [2021-08-06 19:47:30,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 73, result has 58.5 percent of original size [2021-08-06 19:47:30,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 84, result has 55.8 percent of original size [2021-08-06 19:47:30,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 84, result has 55.8 percent of original size [2021-08-06 19:47:30,729 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:30,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:30,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:30,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:30,910 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:30,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,204 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 59.4 percent of original size [2021-08-06 19:47:31,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 73, result has 59.2 percent of original size [2021-08-06 19:47:31,610 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 73, result has 59.2 percent of original size [2021-08-06 19:47:31,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 76.5 percent of original size [2021-08-06 19:47:31,701 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 76.5 percent of original size [2021-08-06 19:47:31,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 134, result has 24.7 percent of original size [2021-08-06 19:47:31,772 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 134, result has 24.7 percent of original size [2021-08-06 19:47:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:31,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:31,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511471896] [2021-08-06 19:47:31,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511471896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:31,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774317184] [2021-08-06 19:47:31,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:47:31,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:31,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:31,829 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) [2021-08-06 19:47:31,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:47:33,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:47:33,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-06 19:47:33,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:33,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 365, result has 42.0 percent of original size [2021-08-06 19:47:33,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 365, result has 42.0 percent of original size [2021-08-06 19:47:34,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:34,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:37,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 1926, result has 15.5 percent of original size [2021-08-06 19:47:37,228 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 1926, result has 15.5 percent of original size [2021-08-06 19:47:37,233 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 95.4 percent of original size [2021-08-06 19:47:37,255 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 95.4 percent of original size [2021-08-06 19:47:37,335 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:37,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 227 [2021-08-06 19:47:37,344 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:37,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 195 [2021-08-06 19:47:37,483 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 64.8 percent of original size [2021-08-06 19:47:37,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 64.8 percent of original size [2021-08-06 19:47:37,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 44.1 percent of original size [2021-08-06 19:47:37,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 44.1 percent of original size [2021-08-06 19:47:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:37,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774317184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:37,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:37,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2021-08-06 19:47:37,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240518272] [2021-08-06 19:47:37,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 19:47:37,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:37,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 19:47:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:47:37,638 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2021-08-06 19:47:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:38,718 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-08-06 19:47:38,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:47:38,719 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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 34 [2021-08-06 19:47:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:38,719 INFO L225 Difference]: With dead ends: 61 [2021-08-06 19:47:38,719 INFO L226 Difference]: Without dead ends: 57 [2021-08-06 19:47:38,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2113.2ms TimeCoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 19:47:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-06 19:47:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 39. [2021-08-06 19:47:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-08-06 19:47:38,721 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2021-08-06 19:47:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:38,721 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-08-06 19:47:38,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 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) [2021-08-06 19:47:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-08-06 19:47:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:47:38,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:38,721 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:38,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:38,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:38,933 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2080803114, now seen corresponding path program 24 times [2021-08-06 19:47:38,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:38,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786147471] [2021-08-06 19:47:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:38,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:39,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:39,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786147471] [2021-08-06 19:47:39,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786147471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:39,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649328343] [2021-08-06 19:47:39,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:47:39,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:39,457 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) [2021-08-06 19:47:39,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:47:40,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:47:40,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:40,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 19:47:40,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:41,011 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:47:41,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 95.9 percent of original size [2021-08-06 19:47:41,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:41,232 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:41,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2021-08-06 19:47:41,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2021-08-06 19:47:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:41,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649328343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:41,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:41,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 38 [2021-08-06 19:47:41,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479109803] [2021-08-06 19:47:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 19:47:41,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 19:47:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:47:41,832 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 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) [2021-08-06 19:47:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:42,580 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-08-06 19:47:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:47:42,581 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 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 [2021-08-06 19:47:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:42,581 INFO L225 Difference]: With dead ends: 50 [2021-08-06 19:47:42,581 INFO L226 Difference]: Without dead ends: 36 [2021-08-06 19:47:42,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1168.2ms TimeCoverageRelationStatistics Valid=210, Invalid=2442, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 19:47:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-06 19:47:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-06 19:47:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-06 19:47:42,583 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 35 [2021-08-06 19:47:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:42,583 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-06 19:47:42,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 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) [2021-08-06 19:47:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-06 19:47:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:47:42,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:42,583 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:42,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 19:47:42,784 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,SelfDestructingSolverStorable33 [2021-08-06 19:47:42,784 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:42,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:42,784 INFO L82 PathProgramCache]: Analyzing trace with hash -647370832, now seen corresponding path program 25 times [2021-08-06 19:47:42,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:42,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725425438] [2021-08-06 19:47:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:42,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:43,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:43,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725425438] [2021-08-06 19:47:43,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725425438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:43,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85748900] [2021-08-06 19:47:43,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:47:43,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:43,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:43,312 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) [2021-08-06 19:47:43,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:47:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:44,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-06 19:47:44,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:44,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:44,986 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 89.7 percent of original size [2021-08-06 19:47:45,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:45,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:45,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:47:45,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:47:45,538 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:45,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:45,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85748900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:45,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:45,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 37 [2021-08-06 19:47:45,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551151399] [2021-08-06 19:47:45,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-06 19:47:45,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-06 19:47:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:47:45,554 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-08-06 19:47:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:45,861 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-06 19:47:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:47:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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 [2021-08-06 19:47:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:45,861 INFO L225 Difference]: With dead ends: 37 [2021-08-06 19:47:45,862 INFO L226 Difference]: Without dead ends: 37 [2021-08-06 19:47:45,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 722.7ms TimeCoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:47:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-06 19:47:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-06 19:47:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-08-06 19:47:45,863 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2021-08-06 19:47:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:45,863 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-08-06 19:47:45,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 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) [2021-08-06 19:47:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-08-06 19:47:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:47:45,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:45,863 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:45,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 19:47:46,067 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,SelfDestructingSolverStorable34 [2021-08-06 19:47:46,067 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:46,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2120247532, now seen corresponding path program 26 times [2021-08-06 19:47:46,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:46,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694856959] [2021-08-06 19:47:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:46,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:46,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 65.1 percent of original size [2021-08-06 19:47:46,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 65.1 percent of original size [2021-08-06 19:47:46,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 62.6 percent of original size [2021-08-06 19:47:46,346 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 62.6 percent of original size [2021-08-06 19:47:46,415 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 93, result has 54.6 percent of original size [2021-08-06 19:47:46,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 93, result has 54.6 percent of original size [2021-08-06 19:47:46,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,796 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,905 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:46,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,089 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,205 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,406 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 87, result has 63.0 percent of original size [2021-08-06 19:47:47,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 69, result has 63.5 percent of original size [2021-08-06 19:47:47,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 69, result has 63.5 percent of original size [2021-08-06 19:47:47,694 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 19:47:47,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 19:47:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:47,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:47,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694856959] [2021-08-06 19:47:47,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694856959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:47,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594737614] [2021-08-06 19:47:47,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:47:47,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:47,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:47,750 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) [2021-08-06 19:47:47,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:47:49,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:47:49,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:49,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-06 19:47:49,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:49,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 384, result has 44.7 percent of original size [2021-08-06 19:47:49,415 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 384, result has 44.7 percent of original size [2021-08-06 19:47:50,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:50,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 51.7 percent of original size [2021-08-06 19:47:52,957 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 384, result has 51.4 percent of original size [2021-08-06 19:47:53,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 384, result has 51.4 percent of original size [2021-08-06 19:47:53,171 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:53,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 363 treesize of output 326 [2021-08-06 19:47:53,182 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 19:47:53,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 323 treesize of output 270 [2021-08-06 19:47:53,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 63.6 percent of original size [2021-08-06 19:47:53,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 63.6 percent of original size [2021-08-06 19:47:53,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:47:53,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:47:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:53,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594737614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:53,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:53,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-08-06 19:47:53,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669348175] [2021-08-06 19:47:53,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 19:47:53,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:53,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 19:47:53,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 19:47:53,525 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2021-08-06 19:47:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:54,670 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-08-06 19:47:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:47:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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 36 [2021-08-06 19:47:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:54,671 INFO L225 Difference]: With dead ends: 58 [2021-08-06 19:47:54,671 INFO L226 Difference]: Without dead ends: 39 [2021-08-06 19:47:54,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2219.4ms TimeCoverageRelationStatistics Valid=255, Invalid=3167, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 19:47:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-06 19:47:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-08-06 19:47:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-08-06 19:47:54,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2021-08-06 19:47:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:54,673 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-08-06 19:47:54,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 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) [2021-08-06 19:47:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-08-06 19:47:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 19:47:54,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:54,673 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:54,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-06 19:47:54,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 19:47:54,886 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash 791168618, now seen corresponding path program 27 times [2021-08-06 19:47:54,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:54,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014691306] [2021-08-06 19:47:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:54,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 1 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:55,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:47:55,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014691306] [2021-08-06 19:47:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014691306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:55,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530665434] [2021-08-06 19:47:55,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:47:55,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:55,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:47:55,483 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) [2021-08-06 19:47:55,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:47:57,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:47:57,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:47:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-06 19:47:57,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:47:57,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 92.9 percent of original size [2021-08-06 19:47:57,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 92.9 percent of original size [2021-08-06 19:47:58,300 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:58,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.7 percent of original size [2021-08-06 19:47:58,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2021-08-06 19:47:58,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-08-06 19:47:58,336 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:58,336 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 9.1 percent of original size [2021-08-06 19:47:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:47:58,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530665434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:47:58,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:47:58,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2021-08-06 19:47:58,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348044984] [2021-08-06 19:47:58,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-06 19:47:58,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:47:58,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-06 19:47:58,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 19:47:58,353 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:47:59,104 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-08-06 19:47:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:47:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 19:47:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:47:59,105 INFO L225 Difference]: With dead ends: 39 [2021-08-06 19:47:59,105 INFO L226 Difference]: Without dead ends: 39 [2021-08-06 19:47:59,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1490.8ms TimeCoverageRelationStatistics Valid=602, Invalid=3954, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 19:47:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-06 19:47:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-06 19:47:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-06 19:47:59,107 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 37 [2021-08-06 19:47:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:47:59,108 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-06 19:47:59,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:47:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-06 19:47:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:47:59,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:47:59,108 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:47:59,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 19:47:59,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:47:59,317 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:47:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:47:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash -475197542, now seen corresponding path program 28 times [2021-08-06 19:47:59,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:47:59,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101487081] [2021-08-06 19:47:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:47:59,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:47:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:47:59,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 142, result has 54.8 percent of original size [2021-08-06 19:47:59,580 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 142, result has 54.8 percent of original size [2021-08-06 19:47:59,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 165, result has 55.8 percent of original size [2021-08-06 19:47:59,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 165, result has 55.8 percent of original size [2021-08-06 19:47:59,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 190, result has 54.0 percent of original size [2021-08-06 19:47:59,885 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 190, result has 54.0 percent of original size [2021-08-06 19:48:00,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,173 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,359 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:00,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,373 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,538 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,707 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 246, result has 50.0 percent of original size [2021-08-06 19:48:01,878 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 210, result has 49.8 percent of original size [2021-08-06 19:48:01,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 210, result has 49.8 percent of original size [2021-08-06 19:48:02,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 55.0 percent of original size [2021-08-06 19:48:02,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 55.0 percent of original size [2021-08-06 19:48:02,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 44.4 percent of original size [2021-08-06 19:48:02,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 44.4 percent of original size [2021-08-06 19:48:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:02,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:02,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101487081] [2021-08-06 19:48:02,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101487081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:02,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965802775] [2021-08-06 19:48:02,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:48:02,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:02,207 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) [2021-08-06 19:48:02,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:48:03,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:48:03,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:03,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-06 19:48:03,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:04,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 124, result has 66.8 percent of original size [2021-08-06 19:48:04,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 124, result has 66.8 percent of original size [2021-08-06 19:48:04,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 91.3 percent of original size [2021-08-06 19:48:04,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 91.3 percent of original size [2021-08-06 19:48:07,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 900, result has 31.7 percent of original size [2021-08-06 19:48:07,846 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 900, result has 31.7 percent of original size [2021-08-06 19:48:07,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 96.8 percent of original size [2021-08-06 19:48:07,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 96.8 percent of original size [2021-08-06 19:48:07,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 387 treesize of output 337 [2021-08-06 19:48:07,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 337 treesize of output 293 [2021-08-06 19:48:08,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2021-08-06 19:48:08,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2021-08-06 19:48:08,337 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:48:08,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 43.7 percent of original size [2021-08-06 19:48:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:48:08,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965802775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:08,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:48:08,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 44 [2021-08-06 19:48:08,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570247198] [2021-08-06 19:48:08,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 19:48:08,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:08,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 19:48:08,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1782, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 19:48:08,370 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:12,839 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-08-06 19:48:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:48:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:48:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:12,839 INFO L225 Difference]: With dead ends: 67 [2021-08-06 19:48:12,839 INFO L226 Difference]: Without dead ends: 63 [2021-08-06 19:48:12,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 6553.2ms TimeCoverageRelationStatistics Valid=218, Invalid=3322, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 19:48:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-06 19:48:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2021-08-06 19:48:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 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) [2021-08-06 19:48:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-08-06 19:48:12,841 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2021-08-06 19:48:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:12,841 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-08-06 19:48:12,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-08-06 19:48:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 19:48:12,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:12,842 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:12,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:13,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 19:48:13,045 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:48:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:13,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1077842838, now seen corresponding path program 29 times [2021-08-06 19:48:13,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:13,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048937812] [2021-08-06 19:48:13,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:13,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 92 proven. 13 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:48:13,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:13,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048937812] [2021-08-06 19:48:13,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048937812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:48:13,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356650409] [2021-08-06 19:48:13,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:48:13,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:48:13,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:48:13,164 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) [2021-08-06 19:48:13,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:48:15,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-06 19:48:15,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:48:15,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:48:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:48:15,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:48:15,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:48:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:48:15,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356650409] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:15,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 19:48:15,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 17 [2021-08-06 19:48:15,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037519925] [2021-08-06 19:48:15,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:48:15,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:48:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:48:15,269 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:15,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:15,285 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-08-06 19:48:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:48:15,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 19:48:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:15,286 INFO L225 Difference]: With dead ends: 56 [2021-08-06 19:48:15,286 INFO L226 Difference]: Without dead ends: 40 [2021-08-06 19:48:15,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:48:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-06 19:48:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-06 19:48:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-08-06 19:48:15,287 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 39 [2021-08-06 19:48:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:15,287 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-08-06 19:48:15,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-08-06 19:48:15,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 19:48:15,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:48:15,287 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:48:15,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 19:48:15,501 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,SelfDestructingSolverStorable38 [2021-08-06 19:48:15,501 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:48:15,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:48:15,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1372012912, now seen corresponding path program 30 times [2021-08-06 19:48:15,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:48:15,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364908823] [2021-08-06 19:48:15,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:48:15,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:48:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:48:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-06 19:48:15,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:48:15,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364908823] [2021-08-06 19:48:15,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364908823] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:48:15,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:48:15,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-06 19:48:15,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185582627] [2021-08-06 19:48:15,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:48:15,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:48:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:48:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:15,639 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:48:15,660 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2021-08-06 19:48:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:48:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-06 19:48:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:48:15,660 INFO L225 Difference]: With dead ends: 17 [2021-08-06 19:48:15,660 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 19:48:15,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:48:15,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 19:48:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 19:48:15,661 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) [2021-08-06 19:48:15,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 19:48:15,661 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2021-08-06 19:48:15,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:48:15,661 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 19:48:15,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:48:15,661 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 19:48:15,661 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 19:48:15,663 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 19:48:15,663 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 19:48:15,663 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 19:48:15,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-06 19:48:15,666 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 19:48:15,666 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 19:48:15,667 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 07:48:15 BasicIcfg [2021-08-06 19:48:15,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 19:48:15,667 INFO L168 Benchmark]: Toolchain (without parser) took 122009.46 ms. Allocated memory was 213.9 MB in the beginning and 804.3 MB in the end (delta: 590.3 MB). Free memory was 193.0 MB in the beginning and 284.9 MB in the end (delta: -91.9 MB). Peak memory consumption was 499.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:15,667 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.36 ms. Allocated memory is still 213.9 MB. Free memory is still 195.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:48:15,667 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.21 ms. Allocated memory is still 213.9 MB. Free memory was 193.0 MB in the beginning and 191.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:15,667 INFO L168 Benchmark]: Boogie Preprocessor took 31.41 ms. Allocated memory is still 213.9 MB. Free memory was 191.3 MB in the beginning and 189.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:15,668 INFO L168 Benchmark]: RCFGBuilder took 608.79 ms. Allocated memory is still 213.9 MB. Free memory was 189.7 MB in the beginning and 170.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:15,668 INFO L168 Benchmark]: TraceAbstraction took 121329.05 ms. Allocated memory was 213.9 MB in the beginning and 804.3 MB in the end (delta: 590.3 MB). Free memory was 169.8 MB in the beginning and 284.9 MB in the end (delta: -115.1 MB). Peak memory consumption was 475.2 MB. Max. memory is 8.0 GB. [2021-08-06 19:48:15,668 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 0.36 ms. Allocated memory is still 213.9 MB. Free memory is still 195.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.21 ms. Allocated memory is still 213.9 MB. Free memory was 193.0 MB in the beginning and 191.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.41 ms. Allocated memory is still 213.9 MB. Free memory was 191.3 MB in the beginning and 189.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 608.79 ms. Allocated memory is still 213.9 MB. Free memory was 189.7 MB in the beginning and 170.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 121329.05 ms. Allocated memory was 213.9 MB in the beginning and 804.3 MB in the end (delta: 590.3 MB). Free memory was 169.8 MB in the beginning and 284.9 MB in the end (delta: -115.1 MB). Peak memory consumption was 475.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 115, positive: 80, positive conditional: 80, positive unconditional: 0, negative: 35, negative conditional: 35, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 80, positive: 80, positive conditional: 0, positive unconditional: 80, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 80, positive: 80, positive conditional: 0, positive unconditional: 80, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 80, positive: 80, positive conditional: 0, positive unconditional: 80, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 80, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 80, unknown conditional: 0, unknown unconditional: 80] , Statistics on independence cache: Total cache size (in pairs): 80, Positive cache size: 80, Positive conditional cache size: 0, Positive unconditional cache size: 80, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 35 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 204]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 121247.8ms, OverallIterations: 40, TraceHistogramMax: 14, EmptinessCheckTime: 16.8ms, AutomataDifference: 20083.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 67.4ms, PartialOrderReductionTime: 57.5ms, HoareTripleCheckerStatistics: 525 SDtfs, 602 SDslu, 5161 SDs, 0 SdLazy, 11687 SolverSat, 665 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4927.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1556 GetRequests, 529 SyntacticMatches, 62 SemanticMatches, 965 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4525 ImplicationChecksByTransitivity, 33906.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=38, InterpolantAutomatonStates: 605, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 74.5ms AutomataMinimizationTime, 40 MinimizatonAttempts, 101 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 203.7ms SsaConstructionTime, 1351.8ms SatisfiabilityAnalysisTime, 68915.3ms InterpolantComputationTime, 1709 NumberOfCodeBlocks, 1709 NumberOfCodeBlocksAsserted, 138 NumberOfCheckSat, 1639 ConstructedInterpolants, 67 QuantifiedInterpolants, 50792 SizeOfPredicates, 153 NumberOfNonLiveVariables, 4054 ConjunctsInSsa, 1093 ConjunctsInUnsatCore, 70 InterpolantComputations, 11 PerfectInterpolantSequences, 728/4488 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! [2021-08-06 19:48:15,711 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...