/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:46:22,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:46:22,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:46:22,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 17:46:22,440 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 17:46:22,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:46:22,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:46:22,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:46:22,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:46:22,467 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:46:22,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:46:22,467 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:46:22,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:46:22,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:46:22,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:46:22,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:46:22,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:46:22,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:46:22,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:46:22,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:46:22,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:46:22,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:46:22,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:46:22,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:46:22,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:46:22,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:46:22,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:46:22,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:46:22,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:46:22,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:46:22,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:46:22,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:46:22,470 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:46:22,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:46:22,470 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:46:22,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:46:22,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:46:22,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:46:22,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:46:22,740 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:46:22,741 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:46:22,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2021-08-21 17:46:22,742 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2021-08-21 17:46:22,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:46:22,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:46:22,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:46:22,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:46:22,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:46:22,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:46:22,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:46:22,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:46:22,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:46:22,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:46:22,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:46:22,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:46:22,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:46:22,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/1) ... [2021-08-21 17:46:22,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:46:22,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:22,837 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 17:46:22,839 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 17:46:22,868 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:46:22,868 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:46:22,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:46:22,869 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:46:22,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:46:22,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:46:22,869 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:46:22,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:46:22,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:46:22,869 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 17:46:22,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 17:46:22,870 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 17:46:22,870 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 17:46:23,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:46:23,263 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-21 17:46:23,265 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:46:23 BoogieIcfgContainer [2021-08-21 17:46:23,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:46:23,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:46:23,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:46:23,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:46:23,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:46:22" (1/2) ... [2021-08-21 17:46:23,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c208d3 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:46:23, skipping insertion in model container [2021-08-21 17:46:23,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:46:23" (2/2) ... [2021-08-21 17:46:23,274 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2021-08-21 17:46:23,280 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:46:23,280 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:46:23,280 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:46:23,280 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:46:23,330 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 17:46:23,373 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:46:23,379 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 17:46:23,379 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 17:46:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 75 states have (on average 1.7866666666666666) internal successors, (134), 107 states have internal predecessors, (134), 0 states have call successors, (0), 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 17:46:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:46:23,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:23,478 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:23,479 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:23,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1712403306, now seen corresponding path program 1 times [2021-08-21 17:46:23,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:23,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433596847] [2021-08-21 17:46:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:23,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:23,630 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 17:46:23,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:23,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433596847] [2021-08-21 17:46:23,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433596847] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:46:23,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:46:23,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:46:23,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552536322] [2021-08-21 17:46:23,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:46:23,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:23,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:46:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:46:23,647 INFO L87 Difference]: Start difference. First operand has 108 states, 75 states have (on average 1.7866666666666666) internal successors, (134), 107 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:23,679 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2021-08-21 17:46:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:46:23,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:46:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:23,686 INFO L225 Difference]: With dead ends: 152 [2021-08-21 17:46:23,686 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 17:46:23,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:46:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 17:46:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 17:46:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-21 17:46:23,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2021-08-21 17:46:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:23,706 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-21 17:46:23,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-21 17:46:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:46:23,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:23,707 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 17:46:23,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:46:23,707 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:23,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:23,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1801896379, now seen corresponding path program 1 times [2021-08-21 17:46:23,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:23,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609559835] [2021-08-21 17:46:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:23,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:23,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:23,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609559835] [2021-08-21 17:46:23,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609559835] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:46:23,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:46:23,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 17:46:23,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376020698] [2021-08-21 17:46:23,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:46:23,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:23,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:46:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:46:23,861 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 17:46:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:23,936 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-08-21 17:46:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:46:23,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 17:46:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:23,937 INFO L225 Difference]: With dead ends: 28 [2021-08-21 17:46:23,938 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 17:46:23,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:46:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 17:46:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 17:46:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 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 17:46:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-21 17:46:23,943 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2021-08-21 17:46:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:23,944 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-21 17:46:23,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 17:46:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-21 17:46:23,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:46:23,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:23,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:23,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:46:23,945 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash 955148747, now seen corresponding path program 1 times [2021-08-21 17:46:23,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:23,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311792319] [2021-08-21 17:46:23,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:23,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:24,051 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 17:46:24,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:24,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311792319] [2021-08-21 17:46:24,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311792319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:24,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60442091] [2021-08-21 17:46:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:24,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:24,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:24,058 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 17:46:24,074 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 17:46:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:24,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:46:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:24,198 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 17:46:24,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60442091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:24,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:24,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:46:24,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104785996] [2021-08-21 17:46:24,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:46:24,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:46:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:46:24,200 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:24,238 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-08-21 17:46:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:46:24,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 17:46:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:24,239 INFO L225 Difference]: With dead ends: 21 [2021-08-21 17:46:24,239 INFO L226 Difference]: Without dead ends: 21 [2021-08-21 17:46:24,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:46:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-21 17:46:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-21 17:46:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-08-21 17:46:24,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2021-08-21 17:46:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:24,242 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-08-21 17:46:24,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:24,242 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-08-21 17:46:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:46:24,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:24,243 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 17:46:24,262 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 17:46:24,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:24,460 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash -688675007, now seen corresponding path program 1 times [2021-08-21 17:46:24,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:24,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097986723] [2021-08-21 17:46:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:24,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:24,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:24,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097986723] [2021-08-21 17:46:24,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097986723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:24,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899528744] [2021-08-21 17:46:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:24,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:24,531 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 17:46:24,556 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 17:46:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:46:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:46:24,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899528744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:24,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:24,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-21 17:46:24,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79413884] [2021-08-21 17:46:24,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:46:24,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:46:24,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:46:24,744 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 17:46:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:24,819 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-08-21 17:46:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:46:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 20 [2021-08-21 17:46:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:24,820 INFO L225 Difference]: With dead ends: 35 [2021-08-21 17:46:24,820 INFO L226 Difference]: Without dead ends: 22 [2021-08-21 17:46:24,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:46:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-21 17:46:24,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-21 17:46:24,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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 17:46:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-21 17:46:24,823 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2021-08-21 17:46:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:24,823 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-21 17:46:24,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 17:46:24,823 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-08-21 17:46:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:46:24,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:24,824 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:24,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 17:46:25,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 17:46:25,037 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:25,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1067783546, now seen corresponding path program 2 times [2021-08-21 17:46:25,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:25,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901988459] [2021-08-21 17:46:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:25,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:46:25,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:25,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901988459] [2021-08-21 17:46:25,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901988459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:25,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349023100] [2021-08-21 17:46:25,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:46:25,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:25,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:25,123 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 17:46:25,161 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 17:46:25,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:46:25,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:25,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 17:46:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:46:25,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349023100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:25,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:25,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 17:46:25,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130750525] [2021-08-21 17:46:25,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:46:25,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:46:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:46:25,353 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:25,463 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-08-21 17:46:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:46:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:46:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:25,465 INFO L225 Difference]: With dead ends: 36 [2021-08-21 17:46:25,465 INFO L226 Difference]: Without dead ends: 23 [2021-08-21 17:46:25,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:46:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-21 17:46:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-21 17:46:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-21 17:46:25,469 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2021-08-21 17:46:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:25,469 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-21 17:46:25,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-21 17:46:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:46:25,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:25,471 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:25,493 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 17:46:25,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:25,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:25,685 INFO L82 PathProgramCache]: Analyzing trace with hash 64753633, now seen corresponding path program 3 times [2021-08-21 17:46:25,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:25,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68440905] [2021-08-21 17:46:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:25,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:46:25,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:25,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68440905] [2021-08-21 17:46:25,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68440905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:25,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622720969] [2021-08-21 17:46:25,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:46:25,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:25,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:25,777 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 17:46:25,777 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 17:46:25,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:46:25,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:25,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:46:25,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:46:26,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622720969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:26,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:26,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 17:46:26,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430334088] [2021-08-21 17:46:26,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:46:26,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:46:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:46:26,005 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 17:46:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:26,094 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-08-21 17:46:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:46:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 17:46:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:26,095 INFO L225 Difference]: With dead ends: 37 [2021-08-21 17:46:26,095 INFO L226 Difference]: Without dead ends: 24 [2021-08-21 17:46:26,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:46:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-21 17:46:26,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-21 17:46:26,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 17:46:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-21 17:46:26,097 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2021-08-21 17:46:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:26,097 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-21 17:46:26,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 17:46:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-21 17:46:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:46:26,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:26,098 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:26,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-21 17:46:26,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:26,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:26,311 INFO L82 PathProgramCache]: Analyzing trace with hash 813667814, now seen corresponding path program 4 times [2021-08-21 17:46:26,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:26,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698291088] [2021-08-21 17:46:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:26,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:46:26,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:26,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698291088] [2021-08-21 17:46:26,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698291088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:26,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320368128] [2021-08-21 17:46:26,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:26,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:26,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:26,424 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 17:46:26,425 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 17:46:26,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:26,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:26,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:46:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:46:26,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320368128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:26,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:26,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 17:46:26,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937440916] [2021-08-21 17:46:26,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:46:26,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:26,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:46:26,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:46:26,648 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:26,755 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-08-21 17:46:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:46:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 17:46:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:26,756 INFO L225 Difference]: With dead ends: 38 [2021-08-21 17:46:26,756 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 17:46:26,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:46:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 17:46:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-21 17:46:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-08-21 17:46:26,759 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 23 [2021-08-21 17:46:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:26,760 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-21 17:46:26,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-08-21 17:46:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:46:26,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:26,762 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:26,781 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 17:46:26,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:26,977 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:26,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1739796351, now seen corresponding path program 5 times [2021-08-21 17:46:26,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:26,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125085085] [2021-08-21 17:46:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:26,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:46:27,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:27,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125085085] [2021-08-21 17:46:27,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125085085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:27,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325000524] [2021-08-21 17:46:27,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:27,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:27,153 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 17:46:27,154 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 17:46:27,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:46:27,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:46:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:27,409 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 24 treesize of output 18 [2021-08-21 17:46:27,471 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 28 treesize of output 22 [2021-08-21 17:46:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:46:27,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325000524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:27,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:27,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 17:46:27,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582371] [2021-08-21 17:46:27,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:46:27,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:46:27,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:46:27,593 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 17:46:27,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:27,754 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-08-21 17:46:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:46:27,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 24 [2021-08-21 17:46:27,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:27,755 INFO L225 Difference]: With dead ends: 43 [2021-08-21 17:46:27,755 INFO L226 Difference]: Without dead ends: 38 [2021-08-21 17:46:27,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:46:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-21 17:46:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-08-21 17:46:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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 17:46:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-08-21 17:46:27,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2021-08-21 17:46:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:27,757 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-08-21 17:46:27,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 17:46:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-08-21 17:46:27,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:46:27,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:27,758 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:27,777 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 17:46:27,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:27,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1667372875, now seen corresponding path program 6 times [2021-08-21 17:46:27,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:27,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763842822] [2021-08-21 17:46:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:27,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:46:28,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:28,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763842822] [2021-08-21 17:46:28,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763842822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:28,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425430169] [2021-08-21 17:46:28,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:28,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:28,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:28,149 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 17:46:28,150 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 17:46:28,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:46:28,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:28,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 17:46:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:28,411 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 36 treesize of output 28 [2021-08-21 17:46:28,522 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 37 treesize of output 29 [2021-08-21 17:46:28,525 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 29 treesize of output 21 [2021-08-21 17:46:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:46:28,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425430169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:28,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:28,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 17:46:28,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20665856] [2021-08-21 17:46:28,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:46:28,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:28,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:46:28,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:46:28,545 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 17:46:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:28,760 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-08-21 17:46:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:46:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 25 [2021-08-21 17:46:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:28,761 INFO L225 Difference]: With dead ends: 30 [2021-08-21 17:46:28,761 INFO L226 Difference]: Without dead ends: 26 [2021-08-21 17:46:28,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:46:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-21 17:46:28,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-21 17:46:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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 17:46:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-21 17:46:28,762 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 25 [2021-08-21 17:46:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:28,763 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-21 17:46:28,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 17:46:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-21 17:46:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:46:28,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:28,763 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:28,785 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 17:46:28,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:28,964 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:28,964 INFO L82 PathProgramCache]: Analyzing trace with hash 611846151, now seen corresponding path program 7 times [2021-08-21 17:46:28,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:28,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838898204] [2021-08-21 17:46:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:28,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:46:29,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:29,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838898204] [2021-08-21 17:46:29,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838898204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:29,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917645404] [2021-08-21 17:46:29,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:29,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:29,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:29,074 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 17:46:29,083 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 17:46:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:29,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 17:46:29,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:29,331 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 36 treesize of output 28 [2021-08-21 17:46:29,424 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 36 treesize of output 28 [2021-08-21 17:46:29,426 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 28 treesize of output 20 [2021-08-21 17:46:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:46:29,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917645404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:29,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:29,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 17:46:29,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721409599] [2021-08-21 17:46:29,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:46:29,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:29,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:46:29,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:46:29,453 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:29,558 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-08-21 17:46:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:46:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:46:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:29,561 INFO L225 Difference]: With dead ends: 27 [2021-08-21 17:46:29,561 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:46:29,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:46:29,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:46:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-21 17:46:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-21 17:46:29,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2021-08-21 17:46:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:29,563 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-21 17:46:29,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-21 17:46:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:46:29,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:29,564 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:29,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:29,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 17:46:29,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:29,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1553846405, now seen corresponding path program 8 times [2021-08-21 17:46:29,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:29,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743062296] [2021-08-21 17:46:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:29,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:46:30,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:30,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743062296] [2021-08-21 17:46:30,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743062296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:30,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629038000] [2021-08-21 17:46:30,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:46:30,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:30,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:30,040 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 17:46:30,041 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 17:46:30,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:46:30,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:46:30,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:30,421 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 24 treesize of output 18 [2021-08-21 17:46:30,574 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 28 treesize of output 22 [2021-08-21 17:46:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:46:30,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629038000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:30,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:30,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-08-21 17:46:30,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142993195] [2021-08-21 17:46:30,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 17:46:30,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 17:46:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:46:30,728 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:31,077 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-08-21 17:46:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:46:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:46:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:31,078 INFO L225 Difference]: With dead ends: 46 [2021-08-21 17:46:31,078 INFO L226 Difference]: Without dead ends: 41 [2021-08-21 17:46:31,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:46:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-21 17:46:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2021-08-21 17:46:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-08-21 17:46:31,080 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2021-08-21 17:46:31,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:31,080 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-08-21 17:46:31,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-08-21 17:46:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:46:31,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:31,081 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:31,099 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 17:46:31,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:31,297 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash 691083207, now seen corresponding path program 9 times [2021-08-21 17:46:31,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:31,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968079644] [2021-08-21 17:46:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:31,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:46:31,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:31,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968079644] [2021-08-21 17:46:31,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968079644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:31,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611765265] [2021-08-21 17:46:31,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:46:31,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:31,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:31,520 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 17:46:31,523 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 17:46:31,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:46:31,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 17:46:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:31,919 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 36 treesize of output 28 [2021-08-21 17:46:32,092 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 37 treesize of output 29 [2021-08-21 17:46:32,094 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 29 treesize of output 21 [2021-08-21 17:46:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:46:32,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611765265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:32,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:32,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 17:46:32,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363635933] [2021-08-21 17:46:32,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:46:32,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:46:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:46:32,119 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:32,447 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-08-21 17:46:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:46:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 17:46:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:32,448 INFO L225 Difference]: With dead ends: 33 [2021-08-21 17:46:32,448 INFO L226 Difference]: Without dead ends: 28 [2021-08-21 17:46:32,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 452.9ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:46:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-21 17:46:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-21 17:46:32,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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 17:46:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-21 17:46:32,450 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2021-08-21 17:46:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:32,450 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-21 17:46:32,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-21 17:46:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:46:32,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:32,451 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:32,470 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 17:46:32,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 17:46:32,665 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1965474165, now seen corresponding path program 10 times [2021-08-21 17:46:32,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:32,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363369481] [2021-08-21 17:46:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:32,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:46:32,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:32,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363369481] [2021-08-21 17:46:32,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363369481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:32,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379598738] [2021-08-21 17:46:32,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:32,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:32,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:32,863 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 17:46:32,863 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 17:46:33,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:33,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:33,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 17:46:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:33,200 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 29 treesize of output 23 [2021-08-21 17:46:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:46:33,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379598738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:33,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:33,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 17:46:33,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050029589] [2021-08-21 17:46:33,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:46:33,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:33,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:46:33,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:46:33,286 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:33,414 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-08-21 17:46:33,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:46:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 17:46:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:33,415 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:46:33,415 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 17:46:33,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:46:33,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 17:46:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-21 17:46:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-08-21 17:46:33,417 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2021-08-21 17:46:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:33,417 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-08-21 17:46:33,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-08-21 17:46:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:46:33,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:33,418 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:33,434 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 17:46:33,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 17:46:33,622 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1033672063, now seen corresponding path program 11 times [2021-08-21 17:46:33,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:33,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217617461] [2021-08-21 17:46:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:33,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:33,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:33,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217617461] [2021-08-21 17:46:33,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217617461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732484021] [2021-08-21 17:46:33,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:33,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:33,893 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 17:46:33,893 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 17:46:34,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:46:34,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:34,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 17:46:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:34,323 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 24 treesize of output 18 [2021-08-21 17:46:34,548 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 28 treesize of output 22 [2021-08-21 17:46:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:34,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732484021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:34,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:34,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-08-21 17:46:34,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536106229] [2021-08-21 17:46:34,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:46:34,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:46:34,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:46:34,672 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:35,046 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-08-21 17:46:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:46:35,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 17:46:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:35,047 INFO L225 Difference]: With dead ends: 41 [2021-08-21 17:46:35,047 INFO L226 Difference]: Without dead ends: 30 [2021-08-21 17:46:35,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:46:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-21 17:46:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-21 17:46:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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 17:46:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-08-21 17:46:35,049 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2021-08-21 17:46:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:35,049 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-08-21 17:46:35,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-08-21 17:46:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:46:35,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:35,049 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:35,066 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 17:46:35,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 17:46:35,265 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1333489415, now seen corresponding path program 12 times [2021-08-21 17:46:35,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:35,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188193761] [2021-08-21 17:46:35,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:35,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:35,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:35,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188193761] [2021-08-21 17:46:35,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188193761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:35,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3283653] [2021-08-21 17:46:35,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:35,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:35,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:35,481 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 17:46:35,482 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 17:46:35,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:46:35,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 17:46:35,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:35,917 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 29 treesize of output 23 [2021-08-21 17:46:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:46:36,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3283653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:36,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:36,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-08-21 17:46:36,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750123207] [2021-08-21 17:46:36,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:46:36,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:46:36,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:46:36,039 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:36,243 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-08-21 17:46:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:46:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 17:46:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:36,244 INFO L225 Difference]: With dead ends: 31 [2021-08-21 17:46:36,244 INFO L226 Difference]: Without dead ends: 31 [2021-08-21 17:46:36,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:46:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-21 17:46:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-21 17:46:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 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 17:46:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-08-21 17:46:36,246 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 29 [2021-08-21 17:46:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:36,247 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-08-21 17:46:36,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-08-21 17:46:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 17:46:36,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:36,247 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:36,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-21 17:46:36,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 17:46:36,461 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1845016187, now seen corresponding path program 13 times [2021-08-21 17:46:36,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:36,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336006713] [2021-08-21 17:46:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:36,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:36,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:36,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336006713] [2021-08-21 17:46:36,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336006713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:36,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145520204] [2021-08-21 17:46:36,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:36,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:36,852 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 17:46:36,852 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 17:46:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:37,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 17:46:37,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:37,381 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 24 treesize of output 18 [2021-08-21 17:46:37,628 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 28 treesize of output 22 [2021-08-21 17:46:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:37,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145520204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:37,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:37,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2021-08-21 17:46:37,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220802719] [2021-08-21 17:46:37,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 17:46:37,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:37,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 17:46:37,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:46:37,753 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:38,229 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-08-21 17:46:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:46:38,229 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 17:46:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:38,229 INFO L225 Difference]: With dead ends: 44 [2021-08-21 17:46:38,229 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 17:46:38,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 779.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:46:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 17:46:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-21 17:46:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-08-21 17:46:38,231 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2021-08-21 17:46:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:38,232 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-08-21 17:46:38,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-08-21 17:46:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:46:38,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:38,232 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:38,249 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 17:46:38,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:38,449 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash 959464587, now seen corresponding path program 14 times [2021-08-21 17:46:38,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:38,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546991341] [2021-08-21 17:46:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:38,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:38,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:38,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546991341] [2021-08-21 17:46:38,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546991341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:38,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145604385] [2021-08-21 17:46:38,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:46:38,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:38,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:38,749 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 17:46:38,749 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 17:46:39,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:46:39,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 17:46:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:39,280 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 29 treesize of output 23 [2021-08-21 17:46:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:39,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145604385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:39,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:39,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-08-21 17:46:39,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136406550] [2021-08-21 17:46:39,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:46:39,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:39,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:46:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:46:39,450 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 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 17:46:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:39,727 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-08-21 17:46:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:46:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 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 31 [2021-08-21 17:46:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:39,727 INFO L225 Difference]: With dead ends: 33 [2021-08-21 17:46:39,727 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:46:39,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:46:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:46:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-21 17:46:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-08-21 17:46:39,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2021-08-21 17:46:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:39,729 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-08-21 17:46:39,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 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 17:46:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-08-21 17:46:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:46:39,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:39,730 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:39,750 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 17:46:39,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 17:46:39,933 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash -554883967, now seen corresponding path program 15 times [2021-08-21 17:46:39,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:39,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087969169] [2021-08-21 17:46:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:39,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:40,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:40,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087969169] [2021-08-21 17:46:40,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087969169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:40,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19113717] [2021-08-21 17:46:40,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:46:40,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:40,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:40,822 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 17:46:40,829 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 17:46:41,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:46:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 17:46:41,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:41,707 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-21 17:46:41,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2021-08-21 17:46:42,157 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-08-21 17:46:42,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2021-08-21 17:46:42,161 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 12 treesize of output 8 [2021-08-21 17:46:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:42,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19113717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:42,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:42,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-08-21 17:46:42,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056553235] [2021-08-21 17:46:42,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 17:46:42,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 17:46:42,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1718, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:46:42,275 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:43,472 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-08-21 17:46:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:46:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 17:46:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:43,472 INFO L225 Difference]: With dead ends: 53 [2021-08-21 17:46:43,472 INFO L226 Difference]: Without dead ends: 34 [2021-08-21 17:46:43,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1876.9ms TimeCoverageRelationStatistics Valid=445, Invalid=2977, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:46:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-21 17:46:43,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-21 17:46:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-08-21 17:46:43,476 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 32 [2021-08-21 17:46:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:43,476 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-08-21 17:46:43,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:43,476 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-08-21 17:46:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:46:43,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:43,477 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:43,494 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 17:46:43,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 17:46:43,683 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 17:46:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:43,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1606645255, now seen corresponding path program 16 times [2021-08-21 17:46:43,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:43,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245252805] [2021-08-21 17:46:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:43,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-08-21 17:46:43,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:43,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245252805] [2021-08-21 17:46:43,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245252805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:43,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478409244] [2021-08-21 17:46:43,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:43,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:43,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:43,744 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 17:46:43,746 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 17:46:44,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:44,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:46:44,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-08-21 17:46:44,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478409244] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:46:44,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 17:46:44,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2021-08-21 17:46:44,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15860719] [2021-08-21 17:46:44,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:46:44,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:44,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:46:44,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:46:44,216 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:44,222 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-08-21 17:46:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:46:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:46:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:44,223 INFO L225 Difference]: With dead ends: 18 [2021-08-21 17:46:44,223 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 17:46:44,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:46:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 17:46:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 17:46:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 17:46:44,223 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-08-21 17:46:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:44,223 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 17:46:44,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 17:46:44,223 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 17:46:44,225 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 17:46:44,226 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 17:46:44,226 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 17:46:44,226 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 17:46:44,243 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 17:46:44,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:44,436 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:46:44,436 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:46:44,437 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:46:44 BasicIcfg [2021-08-21 17:46:44,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:46:44,438 INFO L168 Benchmark]: Toolchain (without parser) took 21671.21 ms. Allocated memory was 203.4 MB in the beginning and 357.6 MB in the end (delta: 154.1 MB). Free memory was 183.2 MB in the beginning and 243.2 MB in the end (delta: -60.0 MB). Peak memory consumption was 96.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:46:44,438 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 203.4 MB. Free memory is still 184.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:46:44,438 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.44 ms. Allocated memory is still 203.4 MB. Free memory was 183.1 MB in the beginning and 181.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:46:44,439 INFO L168 Benchmark]: Boogie Preprocessor took 14.79 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 180.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:46:44,439 INFO L168 Benchmark]: RCFGBuilder took 447.49 ms. Allocated memory is still 203.4 MB. Free memory was 180.5 MB in the beginning and 156.9 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:46:44,439 INFO L168 Benchmark]: TraceAbstraction took 21169.77 ms. Allocated memory was 203.4 MB in the beginning and 357.6 MB in the end (delta: 154.1 MB). Free memory was 156.4 MB in the beginning and 243.2 MB in the end (delta: -86.7 MB). Peak memory consumption was 67.8 MB. Max. memory is 8.0 GB. [2021-08-21 17:46:44,440 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 0.12 ms. Allocated memory is still 203.4 MB. Free memory is still 184.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.44 ms. Allocated memory is still 203.4 MB. Free memory was 183.1 MB in the beginning and 181.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.79 ms. Allocated memory is still 203.4 MB. Free memory was 181.6 MB in the beginning and 180.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 447.49 ms. Allocated memory is still 203.4 MB. Free memory was 180.5 MB in the beginning and 156.9 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21169.77 ms. Allocated memory was 203.4 MB in the beginning and 357.6 MB in the end (delta: 154.1 MB). Free memory was 156.4 MB in the beginning and 243.2 MB in the end (delta: -86.7 MB). Peak memory consumption was 67.8 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 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 107]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 21063.3ms, OverallIterations: 19, TraceHistogramMax: 6, EmptinessCheckTime: 28.5ms, AutomataDifference: 4404.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 77.4ms, PartialOrderReductionTime: 65.1ms, HoareTripleCheckerStatistics: 313 SDtfs, 655 SDslu, 2554 SDs, 0 SdLazy, 2645 SolverSat, 324 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1308.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 741 GetRequests, 350 SyntacticMatches, 36 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 6426.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=0, InterpolantAutomatonStates: 209, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 45.6ms AutomataMinimizationTime, 19 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 134.5ms SsaConstructionTime, 493.1ms SatisfiabilityAnalysisTime, 9159.4ms InterpolantComputationTime, 919 NumberOfCodeBlocks, 919 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 883 ConstructedInterpolants, 23 QuantifiedInterpolants, 8878 SizeOfPredicates, 99 NumberOfNonLiveVariables, 2091 ConjunctsInSsa, 386 ConjunctsInUnsatCore, 36 InterpolantComputations, 3 PerfectInterpolantSequences, 230/767 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 17:46:44,464 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...