/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/name-comparator-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:47:38,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:47:38,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:47:38,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:47:38,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:47:38,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:47:38,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:47:38,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:47:38,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:47:38,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:47:38,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:47:38,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-21 17:47:39,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:47:39,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:47:39,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:47:39,012 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 17:47:39,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:47:39,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:47:39,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:47:39,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:47:39,045 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:47:39,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:47:39,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:47:39,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:47:39,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:47:39,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:47:39,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:47:39,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:47:39,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:47:39,047 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:47:39,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:47:39,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:47:39,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:47:39,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:47:39,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:47:39,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:47:39,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:47:39,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:47:39,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:47:39,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:47:39,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:47:39,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:47:39,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:47:39,048 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:47:39,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:47:39,048 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:47:39,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:47:39,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:47:39,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:47:39,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:47:39,323 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:47:39,324 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:47:39,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl [2021-08-21 17:47:39,325 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl' [2021-08-21 17:47:39,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:47:39,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:47:39,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:47:39,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:47:39,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:47:39,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:47:39,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:47:39,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:47:39,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:47:39,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:47:39,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:47:39,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:47:39,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:47:39,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/1) ... [2021-08-21 17:47:39,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:47:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:39,426 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 17:47:39,431 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 17:47:39,466 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:47:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:47:39,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:47:39,466 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:47:39,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:47:39,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:47:39,466 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:47:39,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:47:39,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:47:39,467 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 17:47:39,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:47:39,760 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 17:47:39,762 INFO L202 PluginConnector]: Adding new model name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:47:39 BoogieIcfgContainer [2021-08-21 17:47:39,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:47:39,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:47:39,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:47:39,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:47:39,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:47:39" (1/2) ... [2021-08-21 17:47:39,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3d760 and model type name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:47:39, skipping insertion in model container [2021-08-21 17:47:39,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:47:39" (2/2) ... [2021-08-21 17:47:39,768 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-symm.wvr.bpl [2021-08-21 17:47:39,772 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:47:39,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:47:39,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:47:39,772 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:47:39,809 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 17:47:39,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:47:39,844 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 17:47:39,844 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 17:47:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.65) internal successors, (33), 27 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 17:47:39,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:47:39,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:39,892 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:39,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:39,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1756997323, now seen corresponding path program 1 times [2021-08-21 17:47:39,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:39,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576446099] [2021-08-21 17:47:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:39,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:40,198 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 17:47:40,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:40,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576446099] [2021-08-21 17:47:40,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576446099] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:47:40,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:47:40,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 17:47:40,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898092781] [2021-08-21 17:47:40,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:47:40,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:47:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:47:40,219 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.65) internal successors, (33), 27 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) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:40,337 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-08-21 17:47:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:47:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:47:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:40,345 INFO L225 Difference]: With dead ends: 60 [2021-08-21 17:47:40,345 INFO L226 Difference]: Without dead ends: 24 [2021-08-21 17:47:40,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:47:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-21 17:47:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2021-08-21 17:47:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-21 17:47:40,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-21 17:47:40,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:40,379 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-21 17:47:40,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-21 17:47:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:47:40,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:40,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:40,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:47:40,380 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:40,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash -542032969, now seen corresponding path program 1 times [2021-08-21 17:47:40,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:40,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131072394] [2021-08-21 17:47:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:40,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:40,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:40,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131072394] [2021-08-21 17:47:40,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131072394] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:47:40,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:47:40,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:47:40,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928876446] [2021-08-21 17:47:40,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:47:40,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:47:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:47:40,463 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:40,487 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-08-21 17:47:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:47:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 17:47:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:40,488 INFO L225 Difference]: With dead ends: 17 [2021-08-21 17:47:40,489 INFO L226 Difference]: Without dead ends: 14 [2021-08-21 17:47:40,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:47:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-21 17:47:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-21 17:47:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-21 17:47:40,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2021-08-21 17:47:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:40,494 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-21 17:47:40,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-21 17:47:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:47:40,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:40,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:40,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:47:40,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:40,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:40,497 INFO L82 PathProgramCache]: Analyzing trace with hash -641455245, now seen corresponding path program 1 times [2021-08-21 17:47:40,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:40,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379846157] [2021-08-21 17:47:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:40,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:40,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:40,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379846157] [2021-08-21 17:47:40,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379846157] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:47:40,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:47:40,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:47:40,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268548307] [2021-08-21 17:47:40,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:47:40,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:47:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:47:40,601 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:40,623 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-08-21 17:47:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:47:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-21 17:47:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:40,625 INFO L225 Difference]: With dead ends: 15 [2021-08-21 17:47:40,625 INFO L226 Difference]: Without dead ends: 15 [2021-08-21 17:47:40,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:47:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-21 17:47:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-21 17:47:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-21 17:47:40,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-08-21 17:47:40,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:40,635 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-21 17:47:40,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-21 17:47:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:47:40,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:40,639 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:40,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:47:40,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1879618545, now seen corresponding path program 1 times [2021-08-21 17:47:40,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:40,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821549540] [2021-08-21 17:47:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:40,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:40,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:40,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821549540] [2021-08-21 17:47:40,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821549540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:40,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261682388] [2021-08-21 17:47:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:40,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:40,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:40,917 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 17:47:40,918 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 17:47:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 17:47:40,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:41,355 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 127 treesize of output 103 [2021-08-21 17:47:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:41,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261682388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:41,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:41,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 17:47:41,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352180741] [2021-08-21 17:47:41,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:47:41,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:47:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:47:41,604 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:41,745 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-08-21 17:47:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:47:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:47:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:41,746 INFO L225 Difference]: With dead ends: 31 [2021-08-21 17:47:41,746 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:47:41,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:47:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:47:41,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-21 17:47:41,748 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 17:47:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-21 17:47:41,748 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2021-08-21 17:47:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:41,748 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-21 17:47:41,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-21 17:47:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:47:41,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:41,749 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:41,770 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 17:47:41,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:41,959 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:41,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1607975181, now seen corresponding path program 2 times [2021-08-21 17:47:41,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:41,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820322902] [2021-08-21 17:47:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:41,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:42,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:42,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820322902] [2021-08-21 17:47:42,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820322902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:42,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220470111] [2021-08-21 17:47:42,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:42,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:42,026 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 17:47:42,052 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 17:47:42,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:47:42,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:42,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:47:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:42,241 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 54 treesize of output 42 [2021-08-21 17:47:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:42,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220470111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:42,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:42,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 17:47:42,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184718002] [2021-08-21 17:47:42,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:47:42,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:47:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:47:42,283 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:42,363 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-08-21 17:47:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:47:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:47:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:42,364 INFO L225 Difference]: With dead ends: 20 [2021-08-21 17:47:42,364 INFO L226 Difference]: Without dead ends: 16 [2021-08-21 17:47:42,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:47:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-21 17:47:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-21 17:47:42,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-21 17:47:42,367 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2021-08-21 17:47:42,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:42,367 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-21 17:47:42,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:42,367 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-21 17:47:42,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:47:42,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:42,368 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:42,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:42,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:42,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash -395098441, now seen corresponding path program 3 times [2021-08-21 17:47:42,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:42,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144435676] [2021-08-21 17:47:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:42,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:42,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:42,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144435676] [2021-08-21 17:47:42,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144435676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:42,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139093244] [2021-08-21 17:47:42,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:47:42,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:42,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:42,673 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 17:47:42,700 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 17:47:42,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:47:42,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:42,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:47:42,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:42,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139093244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:42,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:42,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:47:42,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428777783] [2021-08-21 17:47:42,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:47:42,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:42,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:47:42,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:47:42,874 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:42,898 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-08-21 17:47:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:47:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:47:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:42,899 INFO L225 Difference]: With dead ends: 17 [2021-08-21 17:47:42,899 INFO L226 Difference]: Without dead ends: 17 [2021-08-21 17:47:42,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:47:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-21 17:47:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-21 17:47:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-08-21 17:47:42,901 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-08-21 17:47:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:42,901 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-08-21 17:47:42,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-08-21 17:47:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:47:42,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:42,901 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:42,920 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 17:47:43,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:43,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1462475083, now seen corresponding path program 4 times [2021-08-21 17:47:43,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:43,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693300564] [2021-08-21 17:47:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:43,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:43,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:43,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693300564] [2021-08-21 17:47:43,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693300564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:43,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000873808] [2021-08-21 17:47:43,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:47:43,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:43,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:43,309 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 17:47:43,340 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 17:47:43,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:47:43,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 17:47:43,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:44,161 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:47:44,162 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 140 treesize of output 117 [2021-08-21 17:47:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:44,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000873808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:44,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:44,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 17:47:44,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458078080] [2021-08-21 17:47:44,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:47:44,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:47:44,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:47:44,335 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:44,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:44,489 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-08-21 17:47:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:47:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:47:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:44,490 INFO L225 Difference]: With dead ends: 34 [2021-08-21 17:47:44,490 INFO L226 Difference]: Without dead ends: 30 [2021-08-21 17:47:44,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:47:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-21 17:47:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2021-08-21 17:47:44,492 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 17:47:44,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-08-21 17:47:44,492 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-08-21 17:47:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:44,493 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-08-21 17:47:44,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-08-21 17:47:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:47:44,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:44,493 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:44,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:44,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:44,705 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:44,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1082287817, now seen corresponding path program 5 times [2021-08-21 17:47:44,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:44,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166118298] [2021-08-21 17:47:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:44,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:44,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:44,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166118298] [2021-08-21 17:47:44,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166118298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:44,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821206306] [2021-08-21 17:47:44,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:47:44,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:44,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:44,837 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 17:47:44,867 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 17:47:44,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:47:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:44,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:47:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:45,109 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 54 treesize of output 42 [2021-08-21 17:47:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:45,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821206306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:45,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:45,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 17:47:45,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866426841] [2021-08-21 17:47:45,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:47:45,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:47:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:47:45,136 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:45,253 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-08-21 17:47:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:47:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:47:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:45,254 INFO L225 Difference]: With dead ends: 23 [2021-08-21 17:47:45,254 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 17:47:45,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:47:45,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 17:47:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 17:47:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:45,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-21 17:47:45,255 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 17 [2021-08-21 17:47:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:45,255 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-21 17:47:45,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-21 17:47:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:47:45,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:45,256 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:45,273 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 17:47:45,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:45,473 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2137814541, now seen corresponding path program 6 times [2021-08-21 17:47:45,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:45,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144544109] [2021-08-21 17:47:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:45,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:45,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:45,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144544109] [2021-08-21 17:47:45,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144544109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:45,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742109431] [2021-08-21 17:47:45,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:47:45,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:45,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:45,554 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 17:47:45,555 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 17:47:45,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:47:45,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:45,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:47:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:45,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742109431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:45,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:45,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:47:45,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155887826] [2021-08-21 17:47:45,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:47:45,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:47:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:47:45,820 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:45,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:45,855 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-21 17:47:45,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:47:45,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:47:45,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:45,856 INFO L225 Difference]: With dead ends: 19 [2021-08-21 17:47:45,856 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 17:47:45,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:47:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 17:47:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 17:47:45,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-21 17:47:45,858 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2021-08-21 17:47:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:45,858 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-21 17:47:45,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-21 17:47:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:47:45,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:45,858 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:45,877 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 17:47:46,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:46,075 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:46,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1022116465, now seen corresponding path program 7 times [2021-08-21 17:47:46,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:46,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147343279] [2021-08-21 17:47:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:46,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:46,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:46,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147343279] [2021-08-21 17:47:46,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147343279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:46,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517376546] [2021-08-21 17:47:46,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:47:46,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:46,417 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 17:47:46,439 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 17:47:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 17:47:46,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:47,451 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:47:47,451 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 178 treesize of output 147 [2021-08-21 17:47:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:47,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517376546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:47,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:47,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-21 17:47:47,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046387347] [2021-08-21 17:47:47,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:47:47,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:47:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:47:47,729 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:48,008 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-08-21 17:47:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:47:48,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 17:47:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:48,009 INFO L225 Difference]: With dead ends: 37 [2021-08-21 17:47:48,009 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:47:48,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:47:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:47:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-08-21 17:47:48,011 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 17:47:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-08-21 17:47:48,011 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2021-08-21 17:47:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:48,011 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-08-21 17:47:48,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-08-21 17:47:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:47:48,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:48,012 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:48,031 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 17:47:48,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:48,225 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -795214477, now seen corresponding path program 8 times [2021-08-21 17:47:48,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:48,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709139453] [2021-08-21 17:47:48,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:48,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:47:48,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:48,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709139453] [2021-08-21 17:47:48,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709139453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:48,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633528346] [2021-08-21 17:47:48,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:48,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:48,268 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 17:47:48,269 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 17:47:48,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:47:48,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 17:47:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:47:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633528346] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:47:48,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 17:47:48,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-08-21 17:47:48,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262559344] [2021-08-21 17:47:48,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:47:48,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:47:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:47:48,512 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 17:47:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:48,518 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-08-21 17:47:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:47:48,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 19 [2021-08-21 17:47:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:48,519 INFO L225 Difference]: With dead ends: 26 [2021-08-21 17:47:48,520 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 17:47:48,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:47:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 17:47:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 17:47:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-08-21 17:47:48,523 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 19 [2021-08-21 17:47:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:48,523 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-08-21 17:47:48,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 17:47:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-08-21 17:47:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:47:48,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:48,524 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:48,542 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 17:47:48,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 17:47:48,743 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:48,743 INFO L82 PathProgramCache]: Analyzing trace with hash 843195447, now seen corresponding path program 9 times [2021-08-21 17:47:48,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:48,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799418335] [2021-08-21 17:47:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:48,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:47:48,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:48,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799418335] [2021-08-21 17:47:48,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799418335] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:47:48,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:47:48,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 17:47:48,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952898682] [2021-08-21 17:47:48,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:47:48,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:48,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:47:48,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:47:48,770 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 17:47:48,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:48,774 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2021-08-21 17:47:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:47:48,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 19 [2021-08-21 17:47:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:48,775 INFO L225 Difference]: With dead ends: 7 [2021-08-21 17:47:48,775 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 17:47:48,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:47:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 17:47:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 17:47:48,775 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 17:47:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 17:47:48,775 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-08-21 17:47:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 17:47:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 17:47:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 17:47:48,776 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 17:47:48,777 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 17:47:48,778 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 17:47:48,778 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 17:47:48,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 17:47:48,780 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:47:48,781 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:47:48,782 INFO L202 PluginConnector]: Adding new model name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:47:48 BasicIcfg [2021-08-21 17:47:48,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:47:48,783 INFO L168 Benchmark]: Toolchain (without parser) took 9436.94 ms. Allocated memory was 205.5 MB in the beginning and 376.4 MB in the end (delta: 170.9 MB). Free memory was 185.3 MB in the beginning and 163.1 MB in the end (delta: 22.2 MB). Peak memory consumption was 194.8 MB. Max. memory is 8.0 GB. [2021-08-21 17:47:48,783 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 205.5 MB. Free memory was 186.6 MB in the beginning and 186.5 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:47:48,783 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.12 ms. Allocated memory is still 205.5 MB. Free memory was 185.2 MB in the beginning and 183.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:47:48,783 INFO L168 Benchmark]: Boogie Preprocessor took 17.29 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 182.7 MB in the end (delta: 959.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:47:48,783 INFO L168 Benchmark]: RCFGBuilder took 375.98 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 158.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:47:48,784 INFO L168 Benchmark]: TraceAbstraction took 9018.60 ms. Allocated memory was 205.5 MB in the beginning and 376.4 MB in the end (delta: 170.9 MB). Free memory was 158.2 MB in the beginning and 163.1 MB in the end (delta: -4.9 MB). Peak memory consumption was 166.5 MB. Max. memory is 8.0 GB. [2021-08-21 17:47:48,784 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 205.5 MB. Free memory was 186.6 MB in the beginning and 186.5 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.12 ms. Allocated memory is still 205.5 MB. Free memory was 185.2 MB in the beginning and 183.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.29 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 182.7 MB in the end (delta: 959.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 375.98 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 158.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9018.60 ms. Allocated memory was 205.5 MB in the beginning and 376.4 MB in the end (delta: 170.9 MB). Free memory was 158.2 MB in the beginning and 163.1 MB in the end (delta: -4.9 MB). Peak memory consumption was 166.5 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: 30, positive: 24, positive conditional: 24, positive unconditional: 0, negative: 6, negative conditional: 6, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, 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: 24, positive: 24, positive conditional: 0, positive unconditional: 24, 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: 24, positive: 24, positive conditional: 0, positive unconditional: 24, 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: 24, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 6 - 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: 81]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 8942.3ms, OverallIterations: 12, TraceHistogramMax: 4, EmptinessCheckTime: 9.8ms, AutomataDifference: 1050.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.9ms, PartialOrderReductionTime: 32.1ms, HoareTripleCheckerStatistics: 111 SDtfs, 206 SDslu, 412 SDs, 0 SdLazy, 548 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 314.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 118 SyntacticMatches, 12 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1408.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36.9ms AutomataMinimizationTime, 12 MinimizatonAttempts, 34 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 66.4ms SsaConstructionTime, 275.7ms SatisfiabilityAnalysisTime, 4656.8ms InterpolantComputationTime, 319 NumberOfCodeBlocks, 319 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 299 ConstructedInterpolants, 11 QuantifiedInterpolants, 2906 SizeOfPredicates, 55 NumberOfNonLiveVariables, 638 ConjunctsInSsa, 169 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 61/142 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 17:47:48,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...