/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/popl20-bad/three-array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:22:46,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:22:46,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:22:46,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 18:22:46,773 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 [2021-08-21 18:22:46,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:22:46,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:22:46,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:22:46,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:22:46,797 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:22:46,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:22:46,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:22:46,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:22:46,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:22:46,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:22:46,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:22:46,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:22:46,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:22:46,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:22:46,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:22:46,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:22:46,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:22:46,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:22:46,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:22:46,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:22:46,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:22:46,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:22:46,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:22:46,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:22:46,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:22:46,801 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:22:46,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:22:46,801 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:22:46,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:22:46,801 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:22:46,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:22:47,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:22:47,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:22:47,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:22:47,039 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:22:47,040 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:22:47,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl [2021-08-21 18:22:47,040 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/three-array-sum-alt.wvr.bpl' [2021-08-21 18:22:47,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:22:47,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:22:47,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:22:47,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:22:47,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:22:47,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:22:47,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:22:47,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:22:47,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:22:47,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:22:47,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:22:47,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:22:47,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:22:47,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/1) ... [2021-08-21 18:22:47,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:22:47,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:47,122 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) [2021-08-21 18:22:47,131 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 [2021-08-21 18:22:47,160 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:22:47,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:22:47,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:22:47,160 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:22:47,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:22:47,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:22:47,161 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:22:47,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:22:47,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:22:47,161 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:22:47,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:22:47,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:22:47,162 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:22:47,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:22:47,336 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:22:47,338 INFO L202 PluginConnector]: Adding new model three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:22:47 BoogieIcfgContainer [2021-08-21 18:22:47,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:22:47,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:22:47,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:22:47,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:22:47,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:22:47" (1/2) ... [2021-08-21 18:22:47,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd2ee74 and model type three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:22:47, skipping insertion in model container [2021-08-21 18:22:47,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:22:47" (2/2) ... [2021-08-21 18:22:47,342 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum-alt.wvr.bpl [2021-08-21 18:22:47,345 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:22:47,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:22:47,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:22:47,346 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:22:47,369 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:22:47,394 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:22:47,398 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 [2021-08-21 18:22:47,398 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:22:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 109 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 18:22:47,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:47,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:47,473 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:47,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2038969464, now seen corresponding path program 1 times [2021-08-21 18:22:47,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:47,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475936025] [2021-08-21 18:22:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:47,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:47,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:47,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475936025] [2021-08-21 18:22:47,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475936025] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:22:47,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:22:47,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:22:47,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62465722] [2021-08-21 18:22:47,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:22:47,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:47,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:22:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:22:47,708 INFO L87 Difference]: Start difference. First operand has 110 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 109 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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) [2021-08-21 18:22:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:47,746 INFO L93 Difference]: Finished difference Result 215 states and 267 transitions. [2021-08-21 18:22:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:22:47,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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) Word has length 16 [2021-08-21 18:22:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:47,758 INFO L225 Difference]: With dead ends: 215 [2021-08-21 18:22:47,758 INFO L226 Difference]: Without dead ends: 62 [2021-08-21 18:22:47,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:22:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-21 18:22:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2021-08-21 18:22:47,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 72 transitions. [2021-08-21 18:22:47,792 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 72 transitions. Word has length 16 [2021-08-21 18:22:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:47,793 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 72 transitions. [2021-08-21 18:22:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 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) [2021-08-21 18:22:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 72 transitions. [2021-08-21 18:22:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:22:47,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:47,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:47,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:22:47,796 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:47,800 INFO L82 PathProgramCache]: Analyzing trace with hash 588620202, now seen corresponding path program 1 times [2021-08-21 18:22:47,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:47,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003731903] [2021-08-21 18:22:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:47,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:47,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:47,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003731903] [2021-08-21 18:22:47,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003731903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:47,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207878290] [2021-08-21 18:22:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:47,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:47,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:47,868 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) [2021-08-21 18:22:47,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:22:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:47,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 18:22:47,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:48,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207878290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:48,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:48,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 18:22:48,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405208430] [2021-08-21 18:22:48,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:22:48,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:22:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:22:48,017 INFO L87 Difference]: Start difference. First operand 43 states and 72 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2021-08-21 18:22:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:48,115 INFO L93 Difference]: Finished difference Result 94 states and 153 transitions. [2021-08-21 18:22:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:22:48,115 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) Word has length 18 [2021-08-21 18:22:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:48,118 INFO L225 Difference]: With dead ends: 94 [2021-08-21 18:22:48,118 INFO L226 Difference]: Without dead ends: 94 [2021-08-21 18:22:48,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:22:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-21 18:22:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2021-08-21 18:22:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 98 transitions. [2021-08-21 18:22:48,123 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 98 transitions. Word has length 18 [2021-08-21 18:22:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:48,123 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 98 transitions. [2021-08-21 18:22:48,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2021-08-21 18:22:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 98 transitions. [2021-08-21 18:22:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:22:48,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:48,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:48,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:48,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:48,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1679843110, now seen corresponding path program 1 times [2021-08-21 18:22:48,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:48,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285306874] [2021-08-21 18:22:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:48,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:48,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:48,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285306874] [2021-08-21 18:22:48,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285306874] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:22:48,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:22:48,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:22:48,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498556753] [2021-08-21 18:22:48,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:22:48,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:48,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:22:48,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:22:48,368 INFO L87 Difference]: Start difference. First operand 55 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:48,390 INFO L93 Difference]: Finished difference Result 80 states and 129 transitions. [2021-08-21 18:22:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:22:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:22:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:48,391 INFO L225 Difference]: With dead ends: 80 [2021-08-21 18:22:48,391 INFO L226 Difference]: Without dead ends: 80 [2021-08-21 18:22:48,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-21 18:22:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2021-08-21 18:22:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 58 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-08-21 18:22:48,396 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 18 [2021-08-21 18:22:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:48,396 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-08-21 18:22:48,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-08-21 18:22:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:22:48,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:48,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:48,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:22:48,397 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -507554138, now seen corresponding path program 1 times [2021-08-21 18:22:48,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:48,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280531926] [2021-08-21 18:22:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:48,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:48,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:48,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280531926] [2021-08-21 18:22:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280531926] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:22:48,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:22:48,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:22:48,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305733832] [2021-08-21 18:22:48,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:22:48,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:48,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:22:48,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:22:48,418 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:48,440 INFO L93 Difference]: Finished difference Result 89 states and 142 transitions. [2021-08-21 18:22:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:22:48,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:22:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:48,441 INFO L225 Difference]: With dead ends: 89 [2021-08-21 18:22:48,441 INFO L226 Difference]: Without dead ends: 85 [2021-08-21 18:22:48,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-21 18:22:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2021-08-21 18:22:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.75) internal successors, (112), 64 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 112 transitions. [2021-08-21 18:22:48,445 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 112 transitions. Word has length 18 [2021-08-21 18:22:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:48,446 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 112 transitions. [2021-08-21 18:22:48,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 112 transitions. [2021-08-21 18:22:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:22:48,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:48,446 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:48,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:22:48,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1422657754, now seen corresponding path program 2 times [2021-08-21 18:22:48,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:48,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800484893] [2021-08-21 18:22:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:48,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:48,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:48,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800484893] [2021-08-21 18:22:48,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800484893] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:22:48,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:22:48,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:22:48,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479982416] [2021-08-21 18:22:48,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:22:48,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:22:48,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:48,476 INFO L87 Difference]: Start difference. First operand 65 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:48,498 INFO L93 Difference]: Finished difference Result 85 states and 139 transitions. [2021-08-21 18:22:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:22:48,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:22:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:48,499 INFO L225 Difference]: With dead ends: 85 [2021-08-21 18:22:48,499 INFO L226 Difference]: Without dead ends: 85 [2021-08-21 18:22:48,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-21 18:22:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2021-08-21 18:22:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.75) internal successors, (105), 60 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 105 transitions. [2021-08-21 18:22:48,504 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 105 transitions. Word has length 18 [2021-08-21 18:22:48,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:48,504 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 105 transitions. [2021-08-21 18:22:48,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 105 transitions. [2021-08-21 18:22:48,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:22:48,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:48,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:48,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:22:48,505 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2079938906, now seen corresponding path program 2 times [2021-08-21 18:22:48,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:48,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664360962] [2021-08-21 18:22:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:48,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:48,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:48,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664360962] [2021-08-21 18:22:48,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664360962] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:22:48,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:22:48,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:22:48,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650652844] [2021-08-21 18:22:48,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:22:48,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:22:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:48,551 INFO L87 Difference]: Start difference. First operand 61 states and 105 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:48,582 INFO L93 Difference]: Finished difference Result 72 states and 123 transitions. [2021-08-21 18:22:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:22:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:22:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:48,583 INFO L225 Difference]: With dead ends: 72 [2021-08-21 18:22:48,583 INFO L226 Difference]: Without dead ends: 72 [2021-08-21 18:22:48,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:22:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-21 18:22:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-08-21 18:22:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 55 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 95 transitions. [2021-08-21 18:22:48,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 95 transitions. Word has length 18 [2021-08-21 18:22:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:48,588 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 95 transitions. [2021-08-21 18:22:48,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 95 transitions. [2021-08-21 18:22:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:22:48,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:48,589 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:48,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 18:22:48,589 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1352742088, now seen corresponding path program 1 times [2021-08-21 18:22:48,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:48,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992306832] [2021-08-21 18:22:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:48,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:48,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:48,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992306832] [2021-08-21 18:22:48,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992306832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:48,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434838597] [2021-08-21 18:22:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:48,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:48,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:48,624 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) [2021-08-21 18:22:48,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:22:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:48,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 18:22:48,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:48,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434838597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:48,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:48,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 18:22:48,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641115780] [2021-08-21 18:22:48,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:22:48,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:48,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:22:48,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:22:48,729 INFO L87 Difference]: Start difference. First operand 56 states and 95 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-08-21 18:22:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:48,761 INFO L93 Difference]: Finished difference Result 100 states and 173 transitions. [2021-08-21 18:22:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:22:48,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 20 [2021-08-21 18:22:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:48,763 INFO L225 Difference]: With dead ends: 100 [2021-08-21 18:22:48,763 INFO L226 Difference]: Without dead ends: 100 [2021-08-21 18:22:48,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:22:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-21 18:22:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-08-21 18:22:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 72 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 139 transitions. [2021-08-21 18:22:48,768 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 139 transitions. Word has length 20 [2021-08-21 18:22:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:48,768 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 139 transitions. [2021-08-21 18:22:48,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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) [2021-08-21 18:22:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 139 transitions. [2021-08-21 18:22:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:22:48,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:48,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:48,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:48,985 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,SelfDestructingSolverStorable6 [2021-08-21 18:22:48,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash -952930330, now seen corresponding path program 1 times [2021-08-21 18:22:48,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:48,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537356382] [2021-08-21 18:22:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:48,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:49,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:49,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537356382] [2021-08-21 18:22:49,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537356382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:49,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569186717] [2021-08-21 18:22:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:49,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:49,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:49,118 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) [2021-08-21 18:22:49,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:22:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:49,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:22:49,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:49,511 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 20 treesize of output 16 [2021-08-21 18:22:49,516 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 13 treesize of output 9 [2021-08-21 18:22:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:49,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569186717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:49,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:49,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 18:22:49,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561041083] [2021-08-21 18:22:49,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:22:49,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:22:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:49,581 INFO L87 Difference]: Start difference. First operand 73 states and 139 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-08-21 18:22:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:49,647 INFO L93 Difference]: Finished difference Result 155 states and 273 transitions. [2021-08-21 18:22:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:22:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:22:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:49,648 INFO L225 Difference]: With dead ends: 155 [2021-08-21 18:22:49,648 INFO L226 Difference]: Without dead ends: 150 [2021-08-21 18:22:49,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-21 18:22:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 99. [2021-08-21 18:22:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-21 18:22:49,662 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 22 [2021-08-21 18:22:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:49,663 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-21 18:22:49,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 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) [2021-08-21 18:22:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-21 18:22:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:22:49,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:49,665 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:49,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:49,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:49,898 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:49,899 INFO L82 PathProgramCache]: Analyzing trace with hash -699141206, now seen corresponding path program 2 times [2021-08-21 18:22:49,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:49,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111886224] [2021-08-21 18:22:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:49,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:49,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:49,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111886224] [2021-08-21 18:22:49,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111886224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:49,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765811370] [2021-08-21 18:22:49,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:22:49,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:50,021 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) [2021-08-21 18:22:50,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:22:50,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:50,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:50,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:22:50,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:50,334 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 18 treesize of output 14 [2021-08-21 18:22:50,354 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 13 treesize of output 9 [2021-08-21 18:22:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:50,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765811370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:50,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:50,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 18:22:50,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314328762] [2021-08-21 18:22:50,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:22:50,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:22:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:50,414 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-08-21 18:22:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:50,483 INFO L93 Difference]: Finished difference Result 161 states and 291 transitions. [2021-08-21 18:22:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:22:50,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) Word has length 22 [2021-08-21 18:22:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:50,484 INFO L225 Difference]: With dead ends: 161 [2021-08-21 18:22:50,484 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 18:22:50,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 18:22:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 111. [2021-08-21 18:22:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.981818181818182) internal successors, (218), 110 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 218 transitions. [2021-08-21 18:22:50,489 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 218 transitions. Word has length 22 [2021-08-21 18:22:50,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:50,489 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 218 transitions. [2021-08-21 18:22:50,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2021-08-21 18:22:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 218 transitions. [2021-08-21 18:22:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:22:50,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:50,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:50,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:50,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:50,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:50,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2002710362, now seen corresponding path program 3 times [2021-08-21 18:22:50,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:50,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718741689] [2021-08-21 18:22:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:50,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:50,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:50,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718741689] [2021-08-21 18:22:50,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718741689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:50,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992041267] [2021-08-21 18:22:50,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:22:50,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:50,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:50,784 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) [2021-08-21 18:22:50,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:22:50,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:22:50,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:50,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:22:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:51,168 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 25 treesize of output 19 [2021-08-21 18:22:51,170 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 20 treesize of output 14 [2021-08-21 18:22:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:51,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992041267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:51,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:51,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 18:22:51,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316026155] [2021-08-21 18:22:51,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:22:51,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:22:51,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:22:51,218 INFO L87 Difference]: Start difference. First operand 111 states and 218 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-08-21 18:22:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:51,290 INFO L93 Difference]: Finished difference Result 180 states and 329 transitions. [2021-08-21 18:22:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:22:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) Word has length 22 [2021-08-21 18:22:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:51,291 INFO L225 Difference]: With dead ends: 180 [2021-08-21 18:22:51,291 INFO L226 Difference]: Without dead ends: 175 [2021-08-21 18:22:51,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:22:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-21 18:22:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 119. [2021-08-21 18:22:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 118 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 235 transitions. [2021-08-21 18:22:51,295 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 235 transitions. Word has length 22 [2021-08-21 18:22:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:51,295 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 235 transitions. [2021-08-21 18:22:51,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-08-21 18:22:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 235 transitions. [2021-08-21 18:22:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:22:51,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:51,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:51,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:51,514 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,SelfDestructingSolverStorable9 [2021-08-21 18:22:51,514 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:51,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:51,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1223140714, now seen corresponding path program 4 times [2021-08-21 18:22:51,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:51,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661026379] [2021-08-21 18:22:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:51,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:51,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:51,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661026379] [2021-08-21 18:22:51,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661026379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:51,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654898910] [2021-08-21 18:22:51,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:22:51,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:51,603 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) [2021-08-21 18:22:51,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:22:51,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:22:51,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:22:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:51,953 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 25 treesize of output 19 [2021-08-21 18:22:51,965 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 20 treesize of output 14 [2021-08-21 18:22:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:52,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654898910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:52,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:52,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:22:52,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116615974] [2021-08-21 18:22:52,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:22:52,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:22:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:22:52,040 INFO L87 Difference]: Start difference. First operand 119 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-08-21 18:22:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:52,096 INFO L93 Difference]: Finished difference Result 164 states and 302 transitions. [2021-08-21 18:22:52,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:22:52,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 22 [2021-08-21 18:22:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:52,097 INFO L225 Difference]: With dead ends: 164 [2021-08-21 18:22:52,097 INFO L226 Difference]: Without dead ends: 159 [2021-08-21 18:22:52,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:22:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-21 18:22:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2021-08-21 18:22:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9918032786885247) internal successors, (243), 122 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 243 transitions. [2021-08-21 18:22:52,100 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 243 transitions. Word has length 22 [2021-08-21 18:22:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:52,101 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 243 transitions. [2021-08-21 18:22:52,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-08-21 18:22:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 243 transitions. [2021-08-21 18:22:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:22:52,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:52,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:52,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:52,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:52,321 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash 105771814, now seen corresponding path program 5 times [2021-08-21 18:22:52,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:52,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260817937] [2021-08-21 18:22:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:52,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:52,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:52,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260817937] [2021-08-21 18:22:52,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260817937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:52,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931333413] [2021-08-21 18:22:52,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:22:52,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:52,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:52,403 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) [2021-08-21 18:22:52,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:22:52,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:52,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:52,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:22:52,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:52,783 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 18 treesize of output 14 [2021-08-21 18:22:52,797 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 20 treesize of output 14 [2021-08-21 18:22:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:52,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931333413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:52,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:52,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 18:22:52,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543823363] [2021-08-21 18:22:52,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:22:52,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:22:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:22:52,867 INFO L87 Difference]: Start difference. First operand 123 states and 243 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) [2021-08-21 18:22:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:52,936 INFO L93 Difference]: Finished difference Result 168 states and 314 transitions. [2021-08-21 18:22:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:22:52,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) Word has length 22 [2021-08-21 18:22:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:52,937 INFO L225 Difference]: With dead ends: 168 [2021-08-21 18:22:52,938 INFO L226 Difference]: Without dead ends: 163 [2021-08-21 18:22:52,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:22:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-21 18:22:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 131. [2021-08-21 18:22:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 257 transitions. [2021-08-21 18:22:52,941 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 257 transitions. Word has length 22 [2021-08-21 18:22:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:52,941 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 257 transitions. [2021-08-21 18:22:52,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 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) [2021-08-21 18:22:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 257 transitions. [2021-08-21 18:22:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:22:52,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:52,942 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:52,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:53,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:53,186 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:53,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:53,186 INFO L82 PathProgramCache]: Analyzing trace with hash 738910886, now seen corresponding path program 6 times [2021-08-21 18:22:53,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:53,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887648378] [2021-08-21 18:22:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:53,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:53,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:53,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887648378] [2021-08-21 18:22:53,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887648378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:53,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392602749] [2021-08-21 18:22:53,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:22:53,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:53,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:53,279 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) [2021-08-21 18:22:53,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:22:53,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:22:53,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:22:53,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:53,705 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:22:53,705 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 49 [2021-08-21 18:22:53,750 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 13 treesize of output 9 [2021-08-21 18:22:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:53,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392602749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:53,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:53,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 18:22:53,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608244375] [2021-08-21 18:22:53,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:22:53,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:53,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:22:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:53,802 INFO L87 Difference]: Start difference. First operand 131 states and 257 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-21 18:22:53,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:53,862 INFO L93 Difference]: Finished difference Result 176 states and 328 transitions. [2021-08-21 18:22:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:22:53,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) Word has length 22 [2021-08-21 18:22:53,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:53,863 INFO L225 Difference]: With dead ends: 176 [2021-08-21 18:22:53,863 INFO L226 Difference]: Without dead ends: 171 [2021-08-21 18:22:53,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-21 18:22:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2021-08-21 18:22:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 257 transitions. [2021-08-21 18:22:53,866 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 257 transitions. Word has length 22 [2021-08-21 18:22:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:53,866 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 257 transitions. [2021-08-21 18:22:53,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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) [2021-08-21 18:22:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 257 transitions. [2021-08-21 18:22:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:22:53,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:53,867 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:53,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-21 18:22:54,090 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,SelfDestructingSolverStorable12 [2021-08-21 18:22:54,090 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 908895368, now seen corresponding path program 7 times [2021-08-21 18:22:54,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:54,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630551079] [2021-08-21 18:22:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:54,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:54,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:54,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630551079] [2021-08-21 18:22:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630551079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:54,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579185254] [2021-08-21 18:22:54,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:22:54,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:54,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:54,118 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) [2021-08-21 18:22:54,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:22:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:54,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:22:54,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:54,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579185254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:54,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:54,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 18:22:54,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120002845] [2021-08-21 18:22:54,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:22:54,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:22:54,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:22:54,417 INFO L87 Difference]: Start difference. First operand 131 states and 257 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-08-21 18:22:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:54,479 INFO L93 Difference]: Finished difference Result 256 states and 501 transitions. [2021-08-21 18:22:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:22:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) Word has length 24 [2021-08-21 18:22:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:54,480 INFO L225 Difference]: With dead ends: 256 [2021-08-21 18:22:54,480 INFO L226 Difference]: Without dead ends: 256 [2021-08-21 18:22:54,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:22:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-21 18:22:54,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 175. [2021-08-21 18:22:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0344827586206895) internal successors, (354), 174 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 354 transitions. [2021-08-21 18:22:54,484 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 354 transitions. Word has length 24 [2021-08-21 18:22:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:54,484 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 354 transitions. [2021-08-21 18:22:54,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-08-21 18:22:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 354 transitions. [2021-08-21 18:22:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:22:54,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:54,485 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:54,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:54,701 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,SelfDestructingSolverStorable13 [2021-08-21 18:22:54,701 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:54,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1348748292, now seen corresponding path program 8 times [2021-08-21 18:22:54,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:54,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810661697] [2021-08-21 18:22:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:54,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:54,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:54,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810661697] [2021-08-21 18:22:54,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810661697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:54,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514704617] [2021-08-21 18:22:54,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:22:54,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:54,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:54,745 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) [2021-08-21 18:22:54,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:22:55,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:55,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:55,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:22:55,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:55,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514704617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:55,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:55,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 18:22:55,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450186463] [2021-08-21 18:22:55,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:22:55,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:22:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:22:55,115 INFO L87 Difference]: Start difference. First operand 175 states and 354 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:55,488 INFO L93 Difference]: Finished difference Result 548 states and 1090 transitions. [2021-08-21 18:22:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:22:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:22:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:55,490 INFO L225 Difference]: With dead ends: 548 [2021-08-21 18:22:55,490 INFO L226 Difference]: Without dead ends: 548 [2021-08-21 18:22:55,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:22:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-08-21 18:22:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 306. [2021-08-21 18:22:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.0721311475409836) internal successors, (632), 305 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 632 transitions. [2021-08-21 18:22:55,497 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 632 transitions. Word has length 24 [2021-08-21 18:22:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:55,497 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 632 transitions. [2021-08-21 18:22:55,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 632 transitions. [2021-08-21 18:22:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:22:55,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:55,498 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:55,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:55,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:22:55,708 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash -500999292, now seen corresponding path program 9 times [2021-08-21 18:22:55,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:55,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557324046] [2021-08-21 18:22:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:55,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:55,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:55,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557324046] [2021-08-21 18:22:55,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557324046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:55,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648377702] [2021-08-21 18:22:55,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:22:55,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:55,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:55,771 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) [2021-08-21 18:22:55,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:22:56,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:22:56,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:56,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:22:56,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:56,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648377702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:56,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:56,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 18:22:56,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748580665] [2021-08-21 18:22:56,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:22:56,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:56,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:22:56,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:22:56,097 INFO L87 Difference]: Start difference. First operand 306 states and 632 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-08-21 18:22:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:56,151 INFO L93 Difference]: Finished difference Result 553 states and 1085 transitions. [2021-08-21 18:22:56,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:22:56,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) Word has length 24 [2021-08-21 18:22:56,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:56,153 INFO L225 Difference]: With dead ends: 553 [2021-08-21 18:22:56,153 INFO L226 Difference]: Without dead ends: 495 [2021-08-21 18:22:56,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:22:56,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-21 18:22:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 430. [2021-08-21 18:22:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 2.1002331002331003) internal successors, (901), 429 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 901 transitions. [2021-08-21 18:22:56,160 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 901 transitions. Word has length 24 [2021-08-21 18:22:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:56,160 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 901 transitions. [2021-08-21 18:22:56,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-08-21 18:22:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 901 transitions. [2021-08-21 18:22:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:22:56,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:56,162 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:56,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:56,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:22:56,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1784310908, now seen corresponding path program 10 times [2021-08-21 18:22:56,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:56,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389539000] [2021-08-21 18:22:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:56,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:56,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:56,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389539000] [2021-08-21 18:22:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389539000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:56,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509602543] [2021-08-21 18:22:56,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:22:56,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:56,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:56,424 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) [2021-08-21 18:22:56,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:22:56,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:22:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:22:56,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:56,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509602543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:56,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:56,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:22:56,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78925401] [2021-08-21 18:22:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:22:56,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:56,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:22:56,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:22:56,738 INFO L87 Difference]: Start difference. First operand 430 states and 901 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2021-08-21 18:22:56,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:56,788 INFO L93 Difference]: Finished difference Result 509 states and 1026 transitions. [2021-08-21 18:22:56,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:22:56,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) Word has length 24 [2021-08-21 18:22:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:56,790 INFO L225 Difference]: With dead ends: 509 [2021-08-21 18:22:56,790 INFO L226 Difference]: Without dead ends: 509 [2021-08-21 18:22:56,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:22:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-08-21 18:22:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 414. [2021-08-21 18:22:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.0920096852300243) internal successors, (864), 413 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 864 transitions. [2021-08-21 18:22:56,797 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 864 transitions. Word has length 24 [2021-08-21 18:22:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:56,797 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 864 transitions. [2021-08-21 18:22:56,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2021-08-21 18:22:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 864 transitions. [2021-08-21 18:22:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:22:56,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:56,798 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:56,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:57,020 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,SelfDestructingSolverStorable16 [2021-08-21 18:22:57,020 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1696773576, now seen corresponding path program 11 times [2021-08-21 18:22:57,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:57,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917134237] [2021-08-21 18:22:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:57,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:57,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:57,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917134237] [2021-08-21 18:22:57,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917134237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:57,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353985835] [2021-08-21 18:22:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:22:57,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:57,061 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) [2021-08-21 18:22:57,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:22:57,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:57,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:57,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:22:57,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:57,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353985835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:57,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:57,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:22:57,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848339608] [2021-08-21 18:22:57,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:22:57,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:22:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:22:57,479 INFO L87 Difference]: Start difference. First operand 414 states and 864 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2021-08-21 18:22:57,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:57,535 INFO L93 Difference]: Finished difference Result 820 states and 1639 transitions. [2021-08-21 18:22:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:22:57,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) Word has length 24 [2021-08-21 18:22:57,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:57,538 INFO L225 Difference]: With dead ends: 820 [2021-08-21 18:22:57,538 INFO L226 Difference]: Without dead ends: 818 [2021-08-21 18:22:57,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-08-21 18:22:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 588. [2021-08-21 18:22:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.1379897785349233) internal successors, (1255), 587 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1255 transitions. [2021-08-21 18:22:57,555 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1255 transitions. Word has length 24 [2021-08-21 18:22:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:57,555 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1255 transitions. [2021-08-21 18:22:57,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2021-08-21 18:22:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1255 transitions. [2021-08-21 18:22:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:22:57,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:57,557 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:57,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:57,771 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,SelfDestructingSolverStorable17 [2021-08-21 18:22:57,772 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:57,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1405727288, now seen corresponding path program 12 times [2021-08-21 18:22:57,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:57,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658698792] [2021-08-21 18:22:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:57,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:57,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:57,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658698792] [2021-08-21 18:22:57,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658698792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:57,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609960673] [2021-08-21 18:22:57,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:22:57,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:57,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:57,802 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) [2021-08-21 18:22:57,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:22:58,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:22:58,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:22:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:58,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609960673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:58,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:58,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-21 18:22:58,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067197127] [2021-08-21 18:22:58,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:22:58,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:22:58,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:22:58,116 INFO L87 Difference]: Start difference. First operand 588 states and 1255 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:58,636 INFO L93 Difference]: Finished difference Result 1560 states and 3023 transitions. [2021-08-21 18:22:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:22:58,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:22:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:58,641 INFO L225 Difference]: With dead ends: 1560 [2021-08-21 18:22:58,641 INFO L226 Difference]: Without dead ends: 1548 [2021-08-21 18:22:58,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=515, Invalid=1741, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:22:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2021-08-21 18:22:58,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 866. [2021-08-21 18:22:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.2184971098265898) internal successors, (1919), 865 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1919 transitions. [2021-08-21 18:22:58,660 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1919 transitions. Word has length 24 [2021-08-21 18:22:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:58,660 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1919 transitions. [2021-08-21 18:22:58,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1919 transitions. [2021-08-21 18:22:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:22:58,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:58,662 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:58,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:58,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:58,877 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:58,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1134257736, now seen corresponding path program 13 times [2021-08-21 18:22:58,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:58,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474117451] [2021-08-21 18:22:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:58,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:22:58,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:58,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474117451] [2021-08-21 18:22:58,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474117451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:58,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667768991] [2021-08-21 18:22:58,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:22:58,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:58,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:58,905 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) [2021-08-21 18:22:58,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:22:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:22:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:22:59,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667768991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:59,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:59,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 18:22:59,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740895755] [2021-08-21 18:22:59,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:22:59,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:22:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:22:59,239 INFO L87 Difference]: Start difference. First operand 866 states and 1919 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-08-21 18:22:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:22:59,291 INFO L93 Difference]: Finished difference Result 1529 states and 3278 transitions. [2021-08-21 18:22:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:22:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 24 [2021-08-21 18:22:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:22:59,296 INFO L225 Difference]: With dead ends: 1529 [2021-08-21 18:22:59,296 INFO L226 Difference]: Without dead ends: 1529 [2021-08-21 18:22:59,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:22:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-08-21 18:22:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1135. [2021-08-21 18:22:59,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 2.267195767195767) internal successors, (2571), 1134 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:22:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 2571 transitions. [2021-08-21 18:22:59,316 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 2571 transitions. Word has length 24 [2021-08-21 18:22:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:22:59,316 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 2571 transitions. [2021-08-21 18:22:59,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-08-21 18:22:59,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 2571 transitions. [2021-08-21 18:22:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:22:59,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:22:59,318 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:22:59,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:22:59,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:59,535 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:22:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:22:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash -945799160, now seen corresponding path program 14 times [2021-08-21 18:22:59,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:22:59,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743970255] [2021-08-21 18:22:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:22:59,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:22:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:22:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:22:59,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:22:59,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743970255] [2021-08-21 18:22:59,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743970255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:59,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687462829] [2021-08-21 18:22:59,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:22:59,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:22:59,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:22:59,574 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) [2021-08-21 18:22:59,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:22:59,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:22:59,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:22:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:22:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:22:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:22:59,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687462829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:22:59,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:22:59,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-21 18:22:59,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86117993] [2021-08-21 18:22:59,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:22:59,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:22:59,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:22:59,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:22:59,932 INFO L87 Difference]: Start difference. First operand 1135 states and 2571 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-08-21 18:23:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:00,132 INFO L93 Difference]: Finished difference Result 3065 states and 6521 transitions. [2021-08-21 18:23:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:23:00,132 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) Word has length 24 [2021-08-21 18:23:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:00,143 INFO L225 Difference]: With dead ends: 3065 [2021-08-21 18:23:00,143 INFO L226 Difference]: Without dead ends: 3039 [2021-08-21 18:23:00,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:23:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-08-21 18:23:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2569. [2021-08-21 18:23:00,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2568 states have (on average 2.303738317757009) internal successors, (5916), 2568 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 5916 transitions. [2021-08-21 18:23:00,204 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 5916 transitions. Word has length 24 [2021-08-21 18:23:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:00,205 INFO L470 AbstractCegarLoop]: Abstraction has 2569 states and 5916 transitions. [2021-08-21 18:23:00,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-08-21 18:23:00,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 5916 transitions. [2021-08-21 18:23:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:23:00,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:00,210 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:00,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:00,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:00,427 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:00,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1776783368, now seen corresponding path program 15 times [2021-08-21 18:23:00,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:00,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552694622] [2021-08-21 18:23:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:00,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:00,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:00,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552694622] [2021-08-21 18:23:00,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552694622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:00,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013556709] [2021-08-21 18:23:00,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:23:00,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:00,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:00,466 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) [2021-08-21 18:23:00,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:23:00,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:23:00,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:00,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:23:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:00,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013556709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:00,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:00,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-21 18:23:00,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388502931] [2021-08-21 18:23:00,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:23:00,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:00,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:23:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:23:00,864 INFO L87 Difference]: Start difference. First operand 2569 states and 5916 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-08-21 18:23:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:01,310 INFO L93 Difference]: Finished difference Result 3115 states and 6749 transitions. [2021-08-21 18:23:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:23:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:23:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:01,319 INFO L225 Difference]: With dead ends: 3115 [2021-08-21 18:23:01,319 INFO L226 Difference]: Without dead ends: 3111 [2021-08-21 18:23:01,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=404, Invalid=1402, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:23:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-08-21 18:23:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2516. [2021-08-21 18:23:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2515 states have (on average 2.299005964214712) internal successors, (5782), 2515 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 5782 transitions. [2021-08-21 18:23:01,361 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 5782 transitions. Word has length 24 [2021-08-21 18:23:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:01,361 INFO L470 AbstractCegarLoop]: Abstraction has 2516 states and 5782 transitions. [2021-08-21 18:23:01,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-08-21 18:23:01,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 5782 transitions. [2021-08-21 18:23:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:23:01,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:01,365 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:01,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:01,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:01,583 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:01,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1369242248, now seen corresponding path program 16 times [2021-08-21 18:23:01,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:01,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277506734] [2021-08-21 18:23:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:01,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:01,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:01,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277506734] [2021-08-21 18:23:01,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277506734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:01,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943227051] [2021-08-21 18:23:01,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:23:01,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:01,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:01,617 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) [2021-08-21 18:23:01,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:23:01,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:23:01,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:01,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:23:01,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:02,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943227051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:02,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:02,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 18:23:02,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260455298] [2021-08-21 18:23:02,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:23:02,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:23:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:23:02,011 INFO L87 Difference]: Start difference. First operand 2516 states and 5782 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-21 18:23:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:02,094 INFO L93 Difference]: Finished difference Result 2926 states and 6634 transitions. [2021-08-21 18:23:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:23:02,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 24 [2021-08-21 18:23:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:02,103 INFO L225 Difference]: With dead ends: 2926 [2021-08-21 18:23:02,103 INFO L226 Difference]: Without dead ends: 2926 [2021-08-21 18:23:02,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:23:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-08-21 18:23:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2787. [2021-08-21 18:23:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 2.2796123474515433) internal successors, (6351), 2786 states have internal predecessors, (6351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 6351 transitions. [2021-08-21 18:23:02,153 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 6351 transitions. Word has length 24 [2021-08-21 18:23:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:02,153 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 6351 transitions. [2021-08-21 18:23:02,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-08-21 18:23:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 6351 transitions. [2021-08-21 18:23:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:23:02,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:02,157 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:02,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:02,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:02,377 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash 312062916, now seen corresponding path program 17 times [2021-08-21 18:23:02,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:02,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403834723] [2021-08-21 18:23:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:02,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:02,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:02,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403834723] [2021-08-21 18:23:02,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403834723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:02,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122493493] [2021-08-21 18:23:02,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:23:02,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:02,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:02,665 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) [2021-08-21 18:23:02,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:23:02,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:23:02,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:23:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:03,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 18:23:03,586 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:23:03,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 48 [2021-08-21 18:23:03,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-21 18:23:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:03,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122493493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:03,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:03,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 18:23:03,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090923399] [2021-08-21 18:23:03,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:23:03,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:23:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:23:03,639 INFO L87 Difference]: Start difference. First operand 2787 states and 6351 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:04,232 INFO L93 Difference]: Finished difference Result 3338 states and 7298 transitions. [2021-08-21 18:23:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:23:04,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:23:04,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:04,252 INFO L225 Difference]: With dead ends: 3338 [2021-08-21 18:23:04,253 INFO L226 Difference]: Without dead ends: 3333 [2021-08-21 18:23:04,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:23:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2021-08-21 18:23:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 2825. [2021-08-21 18:23:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 2.2790368271954673) internal successors, (6436), 2824 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 6436 transitions. [2021-08-21 18:23:04,329 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 6436 transitions. Word has length 28 [2021-08-21 18:23:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:04,329 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 6436 transitions. [2021-08-21 18:23:04,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 6436 transitions. [2021-08-21 18:23:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:23:04,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:04,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:04,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:04,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:04,554 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:04,554 INFO L82 PathProgramCache]: Analyzing trace with hash -609724792, now seen corresponding path program 18 times [2021-08-21 18:23:04,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:04,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561852662] [2021-08-21 18:23:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:04,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:04,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:04,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561852662] [2021-08-21 18:23:04,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561852662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:04,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460703498] [2021-08-21 18:23:04,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:23:04,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:04,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:04,809 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) [2021-08-21 18:23:04,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:23:05,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:23:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:05,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:23:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:05,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 18:23:05,814 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:23:05,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 48 [2021-08-21 18:23:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-21 18:23:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:05,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460703498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:05,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:05,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 18:23:05,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137421438] [2021-08-21 18:23:05,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:23:05,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:05,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:23:05,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:23:05,862 INFO L87 Difference]: Start difference. First operand 2825 states and 6436 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:06,350 INFO L93 Difference]: Finished difference Result 3383 states and 7396 transitions. [2021-08-21 18:23:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:23:06,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:23:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:06,357 INFO L225 Difference]: With dead ends: 3383 [2021-08-21 18:23:06,357 INFO L226 Difference]: Without dead ends: 3376 [2021-08-21 18:23:06,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:23:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-08-21 18:23:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2842. [2021-08-21 18:23:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.278071101724745) internal successors, (6472), 2841 states have internal predecessors, (6472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 6472 transitions. [2021-08-21 18:23:06,394 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 6472 transitions. Word has length 28 [2021-08-21 18:23:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:06,394 INFO L470 AbstractCegarLoop]: Abstraction has 2842 states and 6472 transitions. [2021-08-21 18:23:06,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 6472 transitions. [2021-08-21 18:23:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:23:06,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:06,398 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:06,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:06,616 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,SelfDestructingSolverStorable24 [2021-08-21 18:23:06,616 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:06,616 INFO L82 PathProgramCache]: Analyzing trace with hash -355935668, now seen corresponding path program 19 times [2021-08-21 18:23:06,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:06,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269104194] [2021-08-21 18:23:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:06,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:06,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:06,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269104194] [2021-08-21 18:23:06,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269104194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:06,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661821250] [2021-08-21 18:23:06,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:23:06,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:06,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:06,924 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) [2021-08-21 18:23:06,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:23:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:07,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:23:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:07,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 18:23:07,854 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:23:07,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 39 [2021-08-21 18:23:07,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-21 18:23:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:07,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661821250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:07,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:07,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 18:23:07,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30842355] [2021-08-21 18:23:07,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:23:07,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:23:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:23:07,935 INFO L87 Difference]: Start difference. First operand 2842 states and 6472 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:08,449 INFO L93 Difference]: Finished difference Result 3393 states and 7425 transitions. [2021-08-21 18:23:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:23:08,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:23:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:08,456 INFO L225 Difference]: With dead ends: 3393 [2021-08-21 18:23:08,456 INFO L226 Difference]: Without dead ends: 3388 [2021-08-21 18:23:08,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:23:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2021-08-21 18:23:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 2857. [2021-08-21 18:23:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2857 states, 2856 states have (on average 2.2769607843137254) internal successors, (6503), 2856 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 6503 transitions. [2021-08-21 18:23:08,491 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 6503 transitions. Word has length 28 [2021-08-21 18:23:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:08,491 INFO L470 AbstractCegarLoop]: Abstraction has 2857 states and 6503 transitions. [2021-08-21 18:23:08,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 6503 transitions. [2021-08-21 18:23:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:23:08,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:08,495 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:08,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:08,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:23:08,712 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:08,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1596118408, now seen corresponding path program 20 times [2021-08-21 18:23:08,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:08,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483982371] [2021-08-21 18:23:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:08,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:08,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:08,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483982371] [2021-08-21 18:23:08,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483982371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:08,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238071331] [2021-08-21 18:23:08,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:23:08,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:08,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:08,979 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) [2021-08-21 18:23:08,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:23:09,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:23:09,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:23:09,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:09,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 18:23:10,085 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 57 treesize of output 53 [2021-08-21 18:23:10,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-08-21 18:23:10,095 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:23:10,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 30 [2021-08-21 18:23:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:10,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238071331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:10,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:23:10,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 18:23:10,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888354456] [2021-08-21 18:23:10,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:23:10,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:23:10,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:23:10,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:23:10,141 INFO L87 Difference]: Start difference. First operand 2857 states and 6503 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:23:10,599 INFO L93 Difference]: Finished difference Result 3400 states and 7441 transitions. [2021-08-21 18:23:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:23:10,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:23:10,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:23:10,604 INFO L225 Difference]: With dead ends: 3400 [2021-08-21 18:23:10,604 INFO L226 Difference]: Without dead ends: 3395 [2021-08-21 18:23:10,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:23:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-08-21 18:23:10,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2884. [2021-08-21 18:23:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 2.2761012833853624) internal successors, (6562), 2883 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 6562 transitions. [2021-08-21 18:23:10,637 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 6562 transitions. Word has length 28 [2021-08-21 18:23:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:23:10,638 INFO L470 AbstractCegarLoop]: Abstraction has 2884 states and 6562 transitions. [2021-08-21 18:23:10,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:23:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 6562 transitions. [2021-08-21 18:23:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:23:10,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:23:10,642 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:23:10,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:10,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:23:10,859 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:23:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:23:10,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1849907532, now seen corresponding path program 21 times [2021-08-21 18:23:10,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:23:10,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566394428] [2021-08-21 18:23:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:23:10,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:23:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:23:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:23:11,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:23:11,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566394428] [2021-08-21 18:23:11,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566394428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:23:11,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391343096] [2021-08-21 18:23:11,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:23:11,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:11,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:23:11,160 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) [2021-08-21 18:23:11,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:23:11,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:23:11,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:23:11,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 18:23:11,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:23:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 18:23:12,339 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 66 treesize of output 62 [2021-08-21 18:23:12,358 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:23:12,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 62 [2021-08-21 18:23:12,621 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2021-08-21 18:23:12,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:23:12,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:23:12,838 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:80) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:75) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:251) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:235) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:128) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:151) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:438) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-21 18:23:12,841 INFO L168 Benchmark]: Toolchain (without parser) took 25783.28 ms. Allocated memory was 204.5 MB in the beginning and 746.6 MB in the end (delta: 542.1 MB). Free memory was 184.9 MB in the beginning and 622.2 MB in the end (delta: -437.3 MB). Peak memory consumption was 105.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:23:12,841 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 204.5 MB. Free memory is still 186.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:23:12,841 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 204.5 MB. Free memory was 184.8 MB in the beginning and 183.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:23:12,841 INFO L168 Benchmark]: Boogie Preprocessor took 11.38 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 182.4 MB in the end (delta: 906.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:23:12,842 INFO L168 Benchmark]: RCFGBuilder took 247.35 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 168.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:23:12,842 INFO L168 Benchmark]: TraceAbstraction took 25501.39 ms. Allocated memory was 204.5 MB in the beginning and 746.6 MB in the end (delta: 542.1 MB). Free memory was 168.2 MB in the beginning and 622.2 MB in the end (delta: -454.1 MB). Peak memory consumption was 88.8 MB. Max. memory is 8.0 GB. [2021-08-21 18:23:12,843 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 204.5 MB. Free memory is still 186.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 204.5 MB. Free memory was 184.8 MB in the beginning and 183.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.38 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 182.4 MB in the end (delta: 906.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 247.35 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 168.7 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25501.39 ms. Allocated memory was 204.5 MB in the beginning and 746.6 MB in the end (delta: 542.1 MB). Free memory was 168.2 MB in the beginning and 622.2 MB in the end (delta: -454.1 MB). Peak memory consumption was 88.8 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: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, 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: 72, positive: 72, positive conditional: 0, positive unconditional: 72, 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: 72, positive: 72, positive conditional: 0, positive unconditional: 72, 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: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-21 18:23:12,869 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...