/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr10.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:39:27,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:39:27,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:39:27,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:39:27,542 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.epf [2021-08-21 13:39:27,572 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:39:27,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:39:27,572 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:39:27,572 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:39:27,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:39:27,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:39:27,574 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:39:27,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:39:27,575 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:39:27,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:39:27,576 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:39:27,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:39:27,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:39:27,577 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:39:27,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:39:27,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:39:27,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:39:27,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:39:27,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:39:27,843 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:39:27,844 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:39:27,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr10.bpl [2021-08-21 13:39:27,845 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr10.bpl' [2021-08-21 13:39:27,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:39:27,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:39:27,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:39:27,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:39:27,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:39:27,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:39:27,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:39:27,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:39:27,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:39:27,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:39:27,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:39:27,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:39:27,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:39:27,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/1) ... [2021-08-21 13:39:27,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:39:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:39:27,917 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 13:39:27,936 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 13:39:27,971 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:39:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:39:27,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:39:27,972 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 13:39:27,972 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 13:39:27,972 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 13:39:27,973 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 13:39:28,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:39:28,167 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 13:39:28,169 INFO L202 PluginConnector]: Adding new model incr-decr10.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:39:28 BoogieIcfgContainer [2021-08-21 13:39:28,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:39:28,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:39:28,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:39:28,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:39:28,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:39:27" (1/2) ... [2021-08-21 13:39:28,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c5de9b and model type incr-decr10.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:39:28, skipping insertion in model container [2021-08-21 13:39:28,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr10.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:39:28" (2/2) ... [2021-08-21 13:39:28,198 INFO L111 eAbstractionObserver]: Analyzing ICFG incr-decr10.bpl [2021-08-21 13:39:28,202 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:39:28,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:39:28,202 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:39:28,202 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:39:28,354 INFO L148 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-08-21 13:39:28,397 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:39:28,401 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 13:39:28,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-08-21 13:39:28,410 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 64 transitions, 208 flow [2021-08-21 13:39:35,144 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 118099 states, 118098 states have (on average 9.75002116885976) internal successors, (1151458), 118098 states have internal predecessors, (1151458), 0 states have call successors, (0), 0 states 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 13:39:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 118099 states, 118098 states have (on average 9.75002116885976) internal successors, (1151458), 118098 states have internal predecessors, (1151458), 0 states have call successors, (0), 0 states 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 13:39:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:39:37,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:39:37,445 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 13:39:37,445 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 13:39:37,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:39:37,449 INFO L82 PathProgramCache]: Analyzing trace with hash -401856762, now seen corresponding path program 1 times [2021-08-21 13:39:37,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:39:37,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127231254] [2021-08-21 13:39:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:39:37,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:39:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:39:37,587 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 13:39:37,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:39:37,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127231254] [2021-08-21 13:39:37,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127231254] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:39:37,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:39:37,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 13:39:37,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007316386] [2021-08-21 13:39:37,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:39:37,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:39:37,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:39:37,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:37,942 INFO L87 Difference]: Start difference. First operand has 118099 states, 118098 states have (on average 9.75002116885976) internal successors, (1151458), 118098 states have internal predecessors, (1151458), 0 states have call successors, (0), 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 16.0) internal successors, (32), 2 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 13:39:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:39:41,904 INFO L93 Difference]: Finished difference Result 121168 states and 1180131 transitions. [2021-08-21 13:39:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:39:41,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 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 13:39:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:39:45,369 INFO L225 Difference]: With dead ends: 121168 [2021-08-21 13:39:45,369 INFO L226 Difference]: Without dead ends: 121157 [2021-08-21 13:39:45,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:39:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121157 states. [2021-08-21 13:39:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121157 to 121157. [2021-08-21 13:39:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121157 states, 121156 states have (on average 9.740054145069166) internal successors, (1180066), 121156 states have internal predecessors, (1180066), 0 states have call successors, (0), 0 states 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 13:40:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121157 states to 121157 states and 1180066 transitions. [2021-08-21 13:40:00,137 INFO L78 Accepts]: Start accepts. Automaton has 121157 states and 1180066 transitions. Word has length 32 [2021-08-21 13:40:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:00,138 INFO L470 AbstractCegarLoop]: Abstraction has 121157 states and 1180066 transitions. [2021-08-21 13:40:00,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 2 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 13:40:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 121157 states and 1180066 transitions. [2021-08-21 13:40:01,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 13:40:01,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:01,914 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 13:40:01,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:40:01,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 13:40:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:01,915 INFO L82 PathProgramCache]: Analyzing trace with hash 849402084, now seen corresponding path program 1 times [2021-08-21 13:40:01,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:01,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461931470] [2021-08-21 13:40:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:01,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:02,032 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 13:40:02,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:02,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461931470] [2021-08-21 13:40:02,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461931470] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:40:02,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:40:02,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 13:40:02,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698786485] [2021-08-21 13:40:02,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:40:02,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:40:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:40:02,036 INFO L87 Difference]: Start difference. First operand 121157 states and 1180066 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 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 13:40:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:06,410 INFO L93 Difference]: Finished difference Result 137537 states and 1335705 transitions. [2021-08-21 13:40:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:40:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 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 13:40:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:08,864 INFO L225 Difference]: With dead ends: 137537 [2021-08-21 13:40:08,864 INFO L226 Difference]: Without dead ends: 137359 [2021-08-21 13:40:08,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:40:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137359 states. [2021-08-21 13:40:22,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137359 to 134357. [2021-08-21 13:40:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134357 states, 134356 states have (on average 9.721649944922445) internal successors, (1306162), 134356 states have internal predecessors, (1306162), 0 states have call successors, (0), 0 states 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 13:40:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134357 states to 134357 states and 1306162 transitions. [2021-08-21 13:40:27,037 INFO L78 Accepts]: Start accepts. Automaton has 134357 states and 1306162 transitions. Word has length 34 [2021-08-21 13:40:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:40:27,038 INFO L470 AbstractCegarLoop]: Abstraction has 134357 states and 1306162 transitions. [2021-08-21 13:40:27,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 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 13:40:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 134357 states and 1306162 transitions. [2021-08-21 13:40:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 13:40:28,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:40:28,964 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 13:40:28,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:40:28,964 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 13:40:28,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:40:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash -531802014, now seen corresponding path program 1 times [2021-08-21 13:40:28,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:40:28,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379380408] [2021-08-21 13:40:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:40:28,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:40:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:40:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:40:29,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:40:29,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379380408] [2021-08-21 13:40:29,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379380408] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:40:29,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:40:29,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:40:29,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851107528] [2021-08-21 13:40:29,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:40:29,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:40:29,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:40:29,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:40:29,168 INFO L87 Difference]: Start difference. First operand 134357 states and 1306162 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 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 13:40:35,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:40:35,331 INFO L93 Difference]: Finished difference Result 177094 states and 1716756 transitions. [2021-08-21 13:40:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:40:35,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 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 13:40:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:40:40,849 INFO L225 Difference]: With dead ends: 177094 [2021-08-21 13:40:40,850 INFO L226 Difference]: Without dead ends: 175779 [2021-08-21 13:40:40,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:40:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175779 states. [2021-08-21 13:40:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175779 to 160035. [2021-08-21 13:40:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160035 states, 160034 states have (on average 9.71773498131647) internal successors, (1555168), 160034 states have internal predecessors, (1555168), 0 states have call successors, (0), 0 states 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 13:41:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160035 states to 160035 states and 1555168 transitions. [2021-08-21 13:41:02,745 INFO L78 Accepts]: Start accepts. Automaton has 160035 states and 1555168 transitions. Word has length 36 [2021-08-21 13:41:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:41:02,749 INFO L470 AbstractCegarLoop]: Abstraction has 160035 states and 1555168 transitions. [2021-08-21 13:41:02,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 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 13:41:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 160035 states and 1555168 transitions. [2021-08-21 13:41:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 13:41:04,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:41:04,898 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 13:41:04,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:41:04,899 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 13:41:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:41:04,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1508323352, now seen corresponding path program 1 times [2021-08-21 13:41:04,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:41:04,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300035948] [2021-08-21 13:41:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:41:04,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:41:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:41:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:41:05,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:41:05,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300035948] [2021-08-21 13:41:05,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300035948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:41:05,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629132514] [2021-08-21 13:41:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:41:05,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:41:05,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:41:05,073 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 13:41:05,133 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 13:41:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:41:05,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:41:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:41:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:41:05,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629132514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:41:05,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:41:05,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 13:41:05,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370592085] [2021-08-21 13:41:05,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 13:41:05,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:41:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 13:41:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 13:41:05,850 INFO L87 Difference]: Start difference. First operand 160035 states and 1555168 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 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 13:41:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:41:15,014 INFO L93 Difference]: Finished difference Result 233979 states and 2270798 transitions. [2021-08-21 13:41:15,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 13:41:15,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 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 13:41:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted.