/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/POPL2022/incr-decr08.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 19:04:00,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 19:04:00,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 19:04:00,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 19:04:00,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 19:04:00,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 19:04:00,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 19:04:00,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 19:04:00,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 19:04:00,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 19:04:00,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 19:04:00,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 19:04:00,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 19:04:00,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 19:04:00,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 19:04:00,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 19:04:00,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 19:04:00,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 19:04:00,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 19:04:00,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 19:04:00,948 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 19:04:00,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 19:04:00,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 19:04:00,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 19:04:00,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 19:04:00,975 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 19:04:00,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 19:04:00,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 19:04:00,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 19:04:00,975 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 19:04:00,975 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 19:04:00,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 19:04:00,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 19:04:00,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 19:04:00,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 19:04:00,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 19:04:00,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 19:04:00,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 19:04:00,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 19:04:00,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 19:04:00,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 19:04:00,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 19:04:00,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:04:00,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 19:04:00,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 19:04:00,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 19:04:00,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 19:04:00,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 19:04:00,978 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 19:04:00,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 19:04:00,978 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 19:04:00,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 19:04:01,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 19:04:01,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 19:04:01,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 19:04:01,335 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 19:04:01,336 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 19:04:01,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr08.bpl [2021-08-21 19:04:01,337 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr08.bpl' [2021-08-21 19:04:01,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 19:04:01,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 19:04:01,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 19:04:01,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 19:04:01,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 19:04:01,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 19:04:01,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 19:04:01,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 19:04:01,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 19:04:01,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 19:04:01,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 19:04:01,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 19:04:01,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 19:04:01,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/1) ... [2021-08-21 19:04:01,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 19:04:01,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:01,458 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 19:04:01,484 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 19:04:01,503 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 19:04:01,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 19:04:01,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 19:04:01,504 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 19:04:01,504 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 19:04:01,504 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 19:04:01,505 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 19:04:01,673 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 19:04:01,673 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 19:04:01,676 INFO L202 PluginConnector]: Adding new model incr-decr08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:04:01 BoogieIcfgContainer [2021-08-21 19:04:01,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 19:04:01,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 19:04:01,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 19:04:01,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 19:04:01,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 07:04:01" (1/2) ... [2021-08-21 19:04:01,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f85f4b7 and model type incr-decr08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:04:01, skipping insertion in model container [2021-08-21 19:04:01,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:04:01" (2/2) ... [2021-08-21 19:04:01,684 INFO L111 eAbstractionObserver]: Analyzing ICFG incr-decr08.bpl [2021-08-21 19:04:01,698 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 19:04:01,698 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 19:04:01,699 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 19:04:01,699 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 19:04:01,818 INFO L148 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2021-08-21 19:04:01,865 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 19:04:01,872 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 19:04:01,881 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-08-21 19:04:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 13123 states, 8385 states have (on average 2.1512224209898627) internal successors, (18038), 13122 states have internal predecessors, (18038), 0 states have call successors, (0), 0 states 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 19:04:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 19:04:03,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:03,479 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:03,480 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2118393816, now seen corresponding path program 1 times [2021-08-21 19:04:03,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:03,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804212876] [2021-08-21 19:04:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:03,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:03,717 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 19:04:03,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:03,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804212876] [2021-08-21 19:04:03,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804212876] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:03,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:03,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 19:04:03,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749979870] [2021-08-21 19:04:03,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 19:04:03,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 19:04:03,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:04:03,778 INFO L87 Difference]: Start difference. First operand has 13123 states, 8385 states have (on average 2.1512224209898627) internal successors, (18038), 13122 states have internal predecessors, (18038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 2 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 19:04:03,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:03,948 INFO L93 Difference]: Finished difference Result 13888 states and 19304 transitions. [2021-08-21 19:04:03,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 19:04:03,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 2 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 26 [2021-08-21 19:04:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:03,974 INFO L225 Difference]: With dead ends: 13888 [2021-08-21 19:04:03,975 INFO L226 Difference]: Without dead ends: 791 [2021-08-21 19:04:03,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 19:04:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-08-21 19:04:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 791. [2021-08-21 19:04:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 2.027848101265823) internal successors, (1602), 790 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1602 transitions. [2021-08-21 19:04:04,065 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1602 transitions. Word has length 26 [2021-08-21 19:04:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:04,066 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1602 transitions. [2021-08-21 19:04:04,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 2 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 19:04:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1602 transitions. [2021-08-21 19:04:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 19:04:04,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:04,070 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:04,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 19:04:04,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:04,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:04,071 INFO L82 PathProgramCache]: Analyzing trace with hash 505418970, now seen corresponding path program 1 times [2021-08-21 19:04:04,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:04,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489085889] [2021-08-21 19:04:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:04,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:04,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:04,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489085889] [2021-08-21 19:04:04,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489085889] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:04:04,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:04:04,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 19:04:04,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134599123] [2021-08-21 19:04:04,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 19:04:04,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 19:04:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 19:04:04,219 INFO L87 Difference]: Start difference. First operand 791 states and 1602 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:04,312 INFO L93 Difference]: Finished difference Result 877 states and 1890 transitions. [2021-08-21 19:04:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 19:04:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 19:04:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:04,317 INFO L225 Difference]: With dead ends: 877 [2021-08-21 19:04:04,318 INFO L226 Difference]: Without dead ends: 865 [2021-08-21 19:04:04,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 19:04:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-08-21 19:04:04,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 851. [2021-08-21 19:04:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 2.1176470588235294) internal successors, (1800), 850 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states 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 19:04:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1800 transitions. [2021-08-21 19:04:04,344 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1800 transitions. Word has length 28 [2021-08-21 19:04:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:04,344 INFO L470 AbstractCegarLoop]: Abstraction has 851 states and 1800 transitions. [2021-08-21 19:04:04,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1800 transitions. [2021-08-21 19:04:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 19:04:04,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:04,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:04,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 19:04:04,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash 263142072, now seen corresponding path program 1 times [2021-08-21 19:04:04,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:04,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052620324] [2021-08-21 19:04:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:04,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:04,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:04,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052620324] [2021-08-21 19:04:04,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052620324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:04,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079755115] [2021-08-21 19:04:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:04,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:04,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:04,527 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 19:04:04,528 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 19:04:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:04,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 19:04:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:04,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079755115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:04,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:04,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 19:04:04,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412540489] [2021-08-21 19:04:04,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 19:04:04,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 19:04:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:04:04,958 INFO L87 Difference]: Start difference. First operand 851 states and 1800 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:05,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:05,081 INFO L93 Difference]: Finished difference Result 1073 states and 2417 transitions. [2021-08-21 19:04:05,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 19:04:05,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 19:04:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:05,091 INFO L225 Difference]: With dead ends: 1073 [2021-08-21 19:04:05,093 INFO L226 Difference]: Without dead ends: 1055 [2021-08-21 19:04:05,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 19:04:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-08-21 19:04:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 983. [2021-08-21 19:04:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 2.160896130346232) internal successors, (2122), 982 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states 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 19:04:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 2122 transitions. [2021-08-21 19:04:05,140 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 2122 transitions. Word has length 30 [2021-08-21 19:04:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:05,141 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 2122 transitions. [2021-08-21 19:04:05,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 2122 transitions. [2021-08-21 19:04:05,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:04:05,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:05,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:05,176 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 19:04:05,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:05,361 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:05,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1274829994, now seen corresponding path program 1 times [2021-08-21 19:04:05,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:05,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752571868] [2021-08-21 19:04:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:05,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:05,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:05,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752571868] [2021-08-21 19:04:05,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752571868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:05,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48987677] [2021-08-21 19:04:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:05,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:05,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:05,479 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 19:04:05,491 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 19:04:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:05,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 19:04:05,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:05,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48987677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:05,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:05,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 19:04:05,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216483850] [2021-08-21 19:04:05,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 19:04:05,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 19:04:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:05,934 INFO L87 Difference]: Start difference. First operand 983 states and 2122 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:06,107 INFO L93 Difference]: Finished difference Result 1393 states and 3102 transitions. [2021-08-21 19:04:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 19:04:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:04:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:06,116 INFO L225 Difference]: With dead ends: 1393 [2021-08-21 19:04:06,116 INFO L226 Difference]: Without dead ends: 1363 [2021-08-21 19:04:06,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 19:04:06,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-08-21 19:04:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 1163. [2021-08-21 19:04:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 2.125645438898451) internal successors, (2470), 1162 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states 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 19:04:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2470 transitions. [2021-08-21 19:04:06,148 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2470 transitions. Word has length 32 [2021-08-21 19:04:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:06,148 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 2470 transitions. [2021-08-21 19:04:06,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2470 transitions. [2021-08-21 19:04:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 19:04:06,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:06,152 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:06,182 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 19:04:06,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 19:04:06,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:06,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:06,379 INFO L82 PathProgramCache]: Analyzing trace with hash 875685784, now seen corresponding path program 1 times [2021-08-21 19:04:06,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:06,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951537116] [2021-08-21 19:04:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:06,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:06,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:06,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951537116] [2021-08-21 19:04:06,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951537116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:06,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956214857] [2021-08-21 19:04:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:06,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:06,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:06,513 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 19:04:06,517 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 19:04:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:06,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:04:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:06,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956214857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:06,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:06,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:04:06,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806952278] [2021-08-21 19:04:06,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:04:06,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:06,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:04:06,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:06,937 INFO L87 Difference]: Start difference. First operand 1163 states and 2470 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:07,165 INFO L93 Difference]: Finished difference Result 1739 states and 3713 transitions. [2021-08-21 19:04:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:04:07,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 19:04:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:07,174 INFO L225 Difference]: With dead ends: 1739 [2021-08-21 19:04:07,175 INFO L226 Difference]: Without dead ends: 1685 [2021-08-21 19:04:07,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:04:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-08-21 19:04:07,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1313. [2021-08-21 19:04:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.0594512195121952) internal successors, (2702), 1312 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states 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 19:04:07,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 2702 transitions. [2021-08-21 19:04:07,214 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 2702 transitions. Word has length 34 [2021-08-21 19:04:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:07,215 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 2702 transitions. [2021-08-21 19:04:07,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 2702 transitions. [2021-08-21 19:04:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 19:04:07,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:07,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:07,246 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 19:04:07,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:07,440 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1421195802, now seen corresponding path program 1 times [2021-08-21 19:04:07,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:07,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115008691] [2021-08-21 19:04:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:07,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:07,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:07,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115008691] [2021-08-21 19:04:07,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115008691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:07,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503828179] [2021-08-21 19:04:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:07,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:07,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:07,577 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 19:04:07,580 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 19:04:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:07,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 19:04:07,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:07,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503828179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:07,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:07,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 19:04:07,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604176522] [2021-08-21 19:04:07,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 19:04:07,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 19:04:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:04:08,000 INFO L87 Difference]: Start difference. First operand 1313 states and 2702 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:08,264 INFO L93 Difference]: Finished difference Result 1969 states and 4038 transitions. [2021-08-21 19:04:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 19:04:08,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 19:04:08,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:08,283 INFO L225 Difference]: With dead ends: 1969 [2021-08-21 19:04:08,283 INFO L226 Difference]: Without dead ends: 1867 [2021-08-21 19:04:08,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 19:04:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-08-21 19:04:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1361. [2021-08-21 19:04:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 2.0088235294117647) internal successors, (2732), 1360 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states 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 19:04:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 2732 transitions. [2021-08-21 19:04:08,326 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 2732 transitions. Word has length 36 [2021-08-21 19:04:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:08,327 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 2732 transitions. [2021-08-21 19:04:08,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 2732 transitions. [2021-08-21 19:04:08,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 19:04:08,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:08,331 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:08,360 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 19:04:08,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:08,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:08,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1191303560, now seen corresponding path program 1 times [2021-08-21 19:04:08,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:08,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604090250] [2021-08-21 19:04:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:08,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:08,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:08,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604090250] [2021-08-21 19:04:08,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604090250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:08,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438145552] [2021-08-21 19:04:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:08,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:08,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:08,677 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 19:04:08,678 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 19:04:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 19:04:08,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:09,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438145552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:09,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:09,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 19:04:09,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220306096] [2021-08-21 19:04:09,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 19:04:09,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 19:04:09,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:09,117 INFO L87 Difference]: Start difference. First operand 1361 states and 2732 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:09,444 INFO L93 Difference]: Finished difference Result 1997 states and 3995 transitions. [2021-08-21 19:04:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 19:04:09,444 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 19:04:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:09,453 INFO L225 Difference]: With dead ends: 1997 [2021-08-21 19:04:09,453 INFO L226 Difference]: Without dead ends: 1799 [2021-08-21 19:04:09,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-21 19:04:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-08-21 19:04:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1277. [2021-08-21 19:04:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 1.9843260188087775) internal successors, (2532), 1276 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states 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 19:04:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 2532 transitions. [2021-08-21 19:04:09,486 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 2532 transitions. Word has length 38 [2021-08-21 19:04:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:09,486 INFO L470 AbstractCegarLoop]: Abstraction has 1277 states and 2532 transitions. [2021-08-21 19:04:09,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 2532 transitions. [2021-08-21 19:04:09,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 19:04:09,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:09,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:09,518 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 19:04:09,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:09,713 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:09,713 INFO L82 PathProgramCache]: Analyzing trace with hash -543682118, now seen corresponding path program 1 times [2021-08-21 19:04:09,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:09,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446973326] [2021-08-21 19:04:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:09,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:09,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:09,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446973326] [2021-08-21 19:04:09,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446973326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:09,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783517697] [2021-08-21 19:04:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:09,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:09,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:09,889 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 19:04:09,890 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 19:04:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:10,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 19:04:10,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:10,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783517697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:10,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:10,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 19:04:10,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360758940] [2021-08-21 19:04:10,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 19:04:10,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:10,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 19:04:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:04:10,373 INFO L87 Difference]: Start difference. First operand 1277 states and 2532 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:10,755 INFO L93 Difference]: Finished difference Result 1795 states and 3551 transitions. [2021-08-21 19:04:10,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 19:04:10,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 19:04:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:10,764 INFO L225 Difference]: With dead ends: 1795 [2021-08-21 19:04:10,765 INFO L226 Difference]: Without dead ends: 1405 [2021-08-21 19:04:10,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-08-21 19:04:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-08-21 19:04:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1031. [2021-08-21 19:04:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 1.9737864077669902) internal successors, (2033), 1030 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states 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 19:04:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2033 transitions. [2021-08-21 19:04:10,791 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2033 transitions. Word has length 40 [2021-08-21 19:04:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:10,791 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 2033 transitions. [2021-08-21 19:04:10,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2033 transitions. [2021-08-21 19:04:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 19:04:10,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:04:10,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:04:10,822 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 19:04:11,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:11,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 5 more)] === [2021-08-21 19:04:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:04:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash -226101416, now seen corresponding path program 1 times [2021-08-21 19:04:11,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:04:11,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824570236] [2021-08-21 19:04:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:11,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:04:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:11,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:04:11,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824570236] [2021-08-21 19:04:11,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824570236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:11,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429651437] [2021-08-21 19:04:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:04:11,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:04:11,185 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 19:04:11,187 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 19:04:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:04:11,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 19:04:11,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:04:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 19:04:11,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429651437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:04:11,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:04:11,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 19:04:11,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189490102] [2021-08-21 19:04:11,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 19:04:11,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:04:11,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 19:04:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:04:11,747 INFO L87 Difference]: Start difference. First operand 1031 states and 2033 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:12,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:04:12,064 INFO L93 Difference]: Finished difference Result 1030 states and 2032 transitions. [2021-08-21 19:04:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 19:04:12,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 19:04:12,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:04:12,073 INFO L225 Difference]: With dead ends: 1030 [2021-08-21 19:04:12,073 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 19:04:12,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-21 19:04:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 19:04:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 19:04:12,074 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 19:04:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 19:04:12,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2021-08-21 19:04:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:04:12,074 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 19:04:12,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:04:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 19:04:12,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 19:04:12,077 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:04:12,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:04:12,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:04:12,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:04:12,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:04:12,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 19:04:12,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 19:04:12,079 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6INUSE_VIOLATION [2021-08-21 19:04:12,079 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7INUSE_VIOLATION [2021-08-21 19:04:12,107 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 19:04:12,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:04:12,307 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:04:12,307 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:04:12,309 INFO L202 PluginConnector]: Adding new model incr-decr08.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:04:12 BasicIcfg [2021-08-21 19:04:12,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:04:12,310 INFO L168 Benchmark]: Toolchain (without parser) took 10945.68 ms. Allocated memory was 212.9 MB in the beginning and 522.2 MB in the end (delta: 309.3 MB). Free memory was 193.9 MB in the beginning and 334.9 MB in the end (delta: -141.0 MB). Peak memory consumption was 169.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:04:12,310 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 ms. Allocated memory is still 212.9 MB. Free memory is still 195.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:04:12,310 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.31 ms. Allocated memory is still 212.9 MB. Free memory was 193.9 MB in the beginning and 192.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:04:12,310 INFO L168 Benchmark]: Boogie Preprocessor took 15.78 ms. Allocated memory is still 212.9 MB. Free memory was 192.4 MB in the beginning and 191.5 MB in the end (delta: 973.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:04:12,311 INFO L168 Benchmark]: RCFGBuilder took 256.64 ms. Allocated memory is still 212.9 MB. Free memory was 191.5 MB in the beginning and 181.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-08-21 19:04:12,311 INFO L168 Benchmark]: TraceAbstraction took 10630.81 ms. Allocated memory was 212.9 MB in the beginning and 522.2 MB in the end (delta: 309.3 MB). Free memory was 181.2 MB in the beginning and 334.9 MB in the end (delta: -153.7 MB). Peak memory consumption was 156.4 MB. Max. memory is 8.0 GB. [2021-08-21 19:04:12,312 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 0.18 ms. Allocated memory is still 212.9 MB. Free memory is still 195.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.31 ms. Allocated memory is still 212.9 MB. Free memory was 193.9 MB in the beginning and 192.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.78 ms. Allocated memory is still 212.9 MB. Free memory was 192.4 MB in the beginning and 191.5 MB in the end (delta: 973.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 256.64 ms. Allocated memory is still 212.9 MB. Free memory was 191.5 MB in the beginning and 181.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10630.81 ms. Allocated memory was 212.9 MB in the beginning and 522.2 MB in the end (delta: 309.3 MB). Free memory was 181.2 MB in the beginning and 334.9 MB in the end (delta: -153.7 MB). Peak memory consumption was 156.4 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: 119744, positive: 114828, positive conditional: 114828, positive unconditional: 0, negative: 4916, negative conditional: 4916, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 114828, positive: 114828, positive conditional: 0, positive unconditional: 114828, 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: 420, positive: 420, positive conditional: 0, positive unconditional: 420, 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: 420, positive: 308, positive conditional: 0, positive unconditional: 308, negative: 112, negative conditional: 0, negative unconditional: 112, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 112, positive: 112, positive conditional: 0, positive unconditional: 112, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 297, positive: 297, positive conditional: 0, positive unconditional: 297, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 114828, positive: 114408, positive conditional: 0, positive unconditional: 114408, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 420, unknown conditional: 0, unknown unconditional: 420] , Statistics on independence cache: Total cache size (in pairs): 420, Positive cache size: 420, Positive conditional cache size: 0, Positive unconditional cache size: 420, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 4916 - 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: 26]: 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 10 procedures, 56 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 10448.0ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 143.2ms, AutomataDifference: 2256.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1479.7ms, PartialOrderReductionTime: 1448.9ms, HoareTripleCheckerStatistics: 241 SDtfs, 0 SDslu, 1020 SDs, 0 SdLazy, 2837 SolverSat, 336 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1330.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 326 GetRequests, 266 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 380.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13123occurred in iteration=0, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 315.0ms AutomataMinimizationTime, 9 MinimizatonAttempts, 2060 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 106.1ms SsaConstructionTime, 281.3ms SatisfiabilityAnalysisTime, 3223.2ms InterpolantComputationTime, 558 NumberOfCodeBlocks, 558 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 542 ConstructedInterpolants, 0 QuantifiedInterpolants, 3694 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1239 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 15/71 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 19:04:12,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...