/usr/bin/java -Xmx16000000000 -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-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe037.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 05:37:49,968 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 05:37:50,031 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 05:37:50,034 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 05:37:50,035 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 05:37:50,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 05:37:50,058 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 05:37:50,058 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 05:37:50,058 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 05:37:50,061 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 05:37:50,061 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 05:37:50,061 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 05:37:50,062 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 05:37:50,062 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 05:37:50,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 05:37:50,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 05:37:50,063 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 05:37:50,063 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 05:37:50,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 05:37:50,063 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 05:37:50,063 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 05:37:50,064 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 05:37:50,064 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 05:37:50,065 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 05:37:50,065 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 05:37:50,065 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 05:37:50,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 05:37:50,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 05:37:50,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 05:37:50,066 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 05:37:50,066 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 05:37:50,066 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 05:37:50,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 05:37:50,067 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 05:37:50,067 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 05:37:50,067 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 05:37:50,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 05:37:50,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 05:37:50,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 05:37:50,325 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 05:37:50,327 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 05:37:50,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe037.i [2023-08-24 05:37:51,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 05:37:51,517 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 05:37:51,518 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i [2023-08-24 05:37:51,532 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98255fa94/a3d96cbb82c8459ca2f16d8a85965ee1/FLAG7a29a8a0c [2023-08-24 05:37:51,542 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98255fa94/a3d96cbb82c8459ca2f16d8a85965ee1 [2023-08-24 05:37:51,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 05:37:51,544 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 05:37:51,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 05:37:51,545 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 05:37:51,547 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 05:37:51,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:51,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14e9e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51, skipping insertion in model container [2023-08-24 05:37:51,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:51,583 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 05:37:51,709 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i[941,954] [2023-08-24 05:37:51,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 05:37:51,854 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 05:37:51,863 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i[941,954] [2023-08-24 05:37:51,878 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-24 05:37:51,879 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-24 05:37:51,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 05:37:51,926 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 05:37:51,927 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 05:37:51,932 INFO L206 MainTranslator]: Completed translation [2023-08-24 05:37:51,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51 WrapperNode [2023-08-24 05:37:51,932 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 05:37:51,933 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 05:37:51,933 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 05:37:51,933 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 05:37:51,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:51,964 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:51,983 INFO L138 Inliner]: procedures = 176, calls = 59, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2023-08-24 05:37:51,984 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 05:37:51,985 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 05:37:51,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 05:37:51,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 05:37:51,991 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:51,991 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:52,005 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:52,006 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:52,009 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:52,010 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:52,011 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:52,012 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:52,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 05:37:52,014 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 05:37:52,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 05:37:52,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 05:37:52,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (1/1) ... [2023-08-24 05:37:52,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 05:37:52,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 05:37:52,078 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) [2023-08-24 05:37:52,101 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 [2023-08-24 05:37:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 05:37:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 05:37:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 05:37:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 05:37:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 05:37:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-24 05:37:52,111 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-24 05:37:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-24 05:37:52,112 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-24 05:37:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-24 05:37:52,112 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-24 05:37:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 05:37:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 05:37:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 05:37:52,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 05:37:52,114 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 05:37:52,197 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 05:37:52,198 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 05:37:52,303 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 05:37:52,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 05:37:52,308 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 05:37:52,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 05:37:52 BoogieIcfgContainer [2023-08-24 05:37:52,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 05:37:52,311 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 05:37:52,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 05:37:52,313 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 05:37:52,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 05:37:51" (1/3) ... [2023-08-24 05:37:52,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177253e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 05:37:52, skipping insertion in model container [2023-08-24 05:37:52,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 05:37:51" (2/3) ... [2023-08-24 05:37:52,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@177253e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 05:37:52, skipping insertion in model container [2023-08-24 05:37:52,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 05:37:52" (3/3) ... [2023-08-24 05:37:52,315 INFO L112 eAbstractionObserver]: Analyzing ICFG safe037.i [2023-08-24 05:37:52,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 05:37:52,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 05:37:52,327 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 05:37:52,380 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 05:37:52,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 86 transitions, 187 flow [2023-08-24 05:37:52,470 INFO L124 PetriNetUnfolderBase]: 2/83 cut-off events. [2023-08-24 05:37:52,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 05:37:52,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 83 events. 2/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-24 05:37:52,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 86 transitions, 187 flow [2023-08-24 05:37:52,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 71 transitions, 151 flow [2023-08-24 05:37:52,481 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 05:37:52,491 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 71 transitions, 151 flow [2023-08-24 05:37:52,495 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 71 transitions, 151 flow [2023-08-24 05:37:52,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 71 transitions, 151 flow [2023-08-24 05:37:52,525 INFO L124 PetriNetUnfolderBase]: 1/71 cut-off events. [2023-08-24 05:37:52,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 05:37:52,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 71 events. 1/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-24 05:37:52,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 1044 [2023-08-24 05:37:54,025 INFO L134 LiptonReduction]: Checked pairs total: 1811 [2023-08-24 05:37:54,025 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-24 05:37:54,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 05:37:54,047 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1fcaf664, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 05:37:54,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 05:37:54,054 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 05:37:54,054 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-24 05:37:54,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 05:37:54,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:37:54,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:37:54,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 05:37:54,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:37:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1206204255, now seen corresponding path program 1 times [2023-08-24 05:37:54,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:37:54,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265919613] [2023-08-24 05:37:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:37:54,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:37:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:37:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 05:37:54,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:37:54,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265919613] [2023-08-24 05:37:54,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265919613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:37:54,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:37:54,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 05:37:54,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608074726] [2023-08-24 05:37:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:37:54,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 05:37:54,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:37:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 05:37:54,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 05:37:54,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 146 [2023-08-24 05:37:54,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:37:54,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 146 [2023-08-24 05:37:54,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:37:54,607 INFO L124 PetriNetUnfolderBase]: 116/215 cut-off events. [2023-08-24 05:37:54,608 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-24 05:37:54,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 215 events. 116/215 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 717 event pairs, 32 based on Foata normal form. 8/220 useless extension candidates. Maximal degree in co-relation 441. Up to 171 conditions per place. [2023-08-24 05:37:54,612 INFO L140 encePairwiseOnDemand]: 140/146 looper letters, 20 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-08-24 05:37:54,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 117 flow [2023-08-24 05:37:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 05:37:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 05:37:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-24 05:37:54,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753424657534246 [2023-08-24 05:37:54,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-24 05:37:54,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-24 05:37:54,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:37:54,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-24 05:37:54,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,637 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 3 states and 252 transitions. [2023-08-24 05:37:54,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 117 flow [2023-08-24 05:37:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 05:37:54,640 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 66 flow [2023-08-24 05:37:54,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-24 05:37:54,643 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-24 05:37:54,644 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 66 flow [2023-08-24 05:37:54,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:37:54,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:37:54,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 05:37:54,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 05:37:54,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:37:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash 706570203, now seen corresponding path program 1 times [2023-08-24 05:37:54,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:37:54,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114992132] [2023-08-24 05:37:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:37:54,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:37:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:37:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 05:37:54,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:37:54,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114992132] [2023-08-24 05:37:54,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114992132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:37:54,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:37:54,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 05:37:54,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976847780] [2023-08-24 05:37:54,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:37:54,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 05:37:54,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:37:54,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 05:37:54,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 05:37:54,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 146 [2023-08-24 05:37:54,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:37:54,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 146 [2023-08-24 05:37:54,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:37:54,843 INFO L124 PetriNetUnfolderBase]: 68/143 cut-off events. [2023-08-24 05:37:54,843 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-24 05:37:54,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 143 events. 68/143 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 433 event pairs, 17 based on Foata normal form. 12/152 useless extension candidates. Maximal degree in co-relation 373. Up to 55 conditions per place. [2023-08-24 05:37:54,847 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 25 selfloop transitions, 7 changer transitions 0/35 dead transitions. [2023-08-24 05:37:54,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 172 flow [2023-08-24 05:37:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 05:37:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 05:37:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 333 transitions. [2023-08-24 05:37:54,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702054794520548 [2023-08-24 05:37:54,851 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 333 transitions. [2023-08-24 05:37:54,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 333 transitions. [2023-08-24 05:37:54,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:37:54,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 333 transitions. [2023-08-24 05:37:54,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,856 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,856 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 66 flow. Second operand 4 states and 333 transitions. [2023-08-24 05:37:54,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 172 flow [2023-08-24 05:37:54,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 05:37:54,857 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 102 flow [2023-08-24 05:37:54,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-08-24 05:37:54,858 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-08-24 05:37:54,859 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 102 flow [2023-08-24 05:37:54,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.5) internal successors, (310), 4 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:37:54,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:37:54,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 05:37:54,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 05:37:54,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:37:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2017830052, now seen corresponding path program 1 times [2023-08-24 05:37:54,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:37:54,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747742030] [2023-08-24 05:37:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:37:54,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:37:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:37:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 05:37:54,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:37:54,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747742030] [2023-08-24 05:37:54,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747742030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:37:54,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:37:54,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 05:37:54,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187351240] [2023-08-24 05:37:54,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:37:54,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 05:37:54,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:37:54,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 05:37:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 05:37:54,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 146 [2023-08-24 05:37:54,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:54,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:37:54,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 146 [2023-08-24 05:37:54,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:37:55,048 INFO L124 PetriNetUnfolderBase]: 194/364 cut-off events. [2023-08-24 05:37:55,048 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2023-08-24 05:37:55,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 364 events. 194/364 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1402 event pairs, 25 based on Foata normal form. 7/371 useless extension candidates. Maximal degree in co-relation 1072. Up to 202 conditions per place. [2023-08-24 05:37:55,051 INFO L140 encePairwiseOnDemand]: 143/146 looper letters, 34 selfloop transitions, 2 changer transitions 14/50 dead transitions. [2023-08-24 05:37:55,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 50 transitions, 330 flow [2023-08-24 05:37:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 05:37:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 05:37:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 321 transitions. [2023-08-24 05:37:55,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496575342465754 [2023-08-24 05:37:55,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 321 transitions. [2023-08-24 05:37:55,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 321 transitions. [2023-08-24 05:37:55,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:37:55,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 321 transitions. [2023-08-24 05:37:55,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,054 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,054 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 102 flow. Second operand 4 states and 321 transitions. [2023-08-24 05:37:55,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 50 transitions, 330 flow [2023-08-24 05:37:55,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 50 transitions, 296 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 05:37:55,057 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 101 flow [2023-08-24 05:37:55,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-08-24 05:37:55,058 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2023-08-24 05:37:55,060 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 101 flow [2023-08-24 05:37:55,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:37:55,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:37:55,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 05:37:55,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 05:37:55,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:37:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2049581434, now seen corresponding path program 2 times [2023-08-24 05:37:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:37:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555307831] [2023-08-24 05:37:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:37:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:37:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:37:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 05:37:55,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:37:55,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555307831] [2023-08-24 05:37:55,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555307831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:37:55,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:37:55,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 05:37:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269172511] [2023-08-24 05:37:55,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:37:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 05:37:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:37:55,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 05:37:55,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-24 05:37:55,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 146 [2023-08-24 05:37:55,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:37:55,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 146 [2023-08-24 05:37:55,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:37:55,352 INFO L124 PetriNetUnfolderBase]: 77/166 cut-off events. [2023-08-24 05:37:55,352 INFO L125 PetriNetUnfolderBase]: For 172/186 co-relation queries the response was YES. [2023-08-24 05:37:55,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 166 events. 77/166 cut-off events. For 172/186 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 606 event pairs, 18 based on Foata normal form. 22/178 useless extension candidates. Maximal degree in co-relation 478. Up to 64 conditions per place. [2023-08-24 05:37:55,353 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 21 selfloop transitions, 10 changer transitions 2/36 dead transitions. [2023-08-24 05:37:55,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 201 flow [2023-08-24 05:37:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 05:37:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 05:37:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 408 transitions. [2023-08-24 05:37:55,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589041095890411 [2023-08-24 05:37:55,355 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 408 transitions. [2023-08-24 05:37:55,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 408 transitions. [2023-08-24 05:37:55,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:37:55,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 408 transitions. [2023-08-24 05:37:55,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,357 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,357 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 101 flow. Second operand 5 states and 408 transitions. [2023-08-24 05:37:55,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 201 flow [2023-08-24 05:37:55,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 05:37:55,358 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 122 flow [2023-08-24 05:37:55,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-24 05:37:55,359 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-08-24 05:37:55,359 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 122 flow [2023-08-24 05:37:55,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.4) internal successors, (387), 5 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:37:55,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:37:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 05:37:55,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 05:37:55,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:37:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1191157671, now seen corresponding path program 1 times [2023-08-24 05:37:55,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:37:55,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993410686] [2023-08-24 05:37:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:37:55,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:37:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:37:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 05:37:55,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:37:55,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993410686] [2023-08-24 05:37:55,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993410686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:37:55,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:37:55,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 05:37:55,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293137046] [2023-08-24 05:37:55,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:37:55,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 05:37:55,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:37:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 05:37:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 05:37:55,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 146 [2023-08-24 05:37:55,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:37:55,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 146 [2023-08-24 05:37:55,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:37:55,537 INFO L124 PetriNetUnfolderBase]: 88/201 cut-off events. [2023-08-24 05:37:55,538 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2023-08-24 05:37:55,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 201 events. 88/201 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 841 event pairs, 15 based on Foata normal form. 1/199 useless extension candidates. Maximal degree in co-relation 656. Up to 114 conditions per place. [2023-08-24 05:37:55,539 INFO L140 encePairwiseOnDemand]: 143/146 looper letters, 21 selfloop transitions, 1 changer transitions 21/45 dead transitions. [2023-08-24 05:37:55,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 342 flow [2023-08-24 05:37:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 05:37:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 05:37:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 330 transitions. [2023-08-24 05:37:55,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565068493150685 [2023-08-24 05:37:55,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 330 transitions. [2023-08-24 05:37:55,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 330 transitions. [2023-08-24 05:37:55,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:37:55,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 330 transitions. [2023-08-24 05:37:55,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,543 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,543 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 122 flow. Second operand 4 states and 330 transitions. [2023-08-24 05:37:55,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 342 flow [2023-08-24 05:37:55,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 284 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-24 05:37:55,547 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 101 flow [2023-08-24 05:37:55,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-08-24 05:37:55,549 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-08-24 05:37:55,549 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 101 flow [2023-08-24 05:37:55,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 05:37:55,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 05:37:55,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 05:37:55,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 05:37:55,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 05:37:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1024091367, now seen corresponding path program 2 times [2023-08-24 05:37:55,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 05:37:55,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751930471] [2023-08-24 05:37:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 05:37:55,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 05:37:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 05:37:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 05:37:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 05:37:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751930471] [2023-08-24 05:37:55,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751930471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 05:37:55,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 05:37:55,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 05:37:55,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121129452] [2023-08-24 05:37:55,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 05:37:55,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 05:37:55,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 05:37:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 05:37:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 05:37:55,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 146 [2023-08-24 05:37:55,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 05:37:55,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 146 [2023-08-24 05:37:55,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 05:37:55,712 INFO L124 PetriNetUnfolderBase]: 111/233 cut-off events. [2023-08-24 05:37:55,712 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2023-08-24 05:37:55,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 233 events. 111/233 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 847 event pairs, 59 based on Foata normal form. 1/234 useless extension candidates. Maximal degree in co-relation 739. Up to 112 conditions per place. [2023-08-24 05:37:55,713 INFO L140 encePairwiseOnDemand]: 142/146 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2023-08-24 05:37:55,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 257 flow [2023-08-24 05:37:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 05:37:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 05:37:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-08-24 05:37:55,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342465753424658 [2023-08-24 05:37:55,715 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-08-24 05:37:55,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-08-24 05:37:55,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 05:37:55,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-08-24 05:37:55,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,717 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 101 flow. Second operand 4 states and 312 transitions. [2023-08-24 05:37:55,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 257 flow [2023-08-24 05:37:55,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 05:37:55,718 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-24 05:37:55,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-08-24 05:37:55,720 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2023-08-24 05:37:55,720 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-24 05:37:55,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 05:37:55,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 05:37:55,722 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 05:37:55,723 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 05:37:55,723 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 05:37:55,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 05:37:55,723 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-08-24 05:37:55,725 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 05:37:55,725 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 05:37:55,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 05:37:55 BasicIcfg [2023-08-24 05:37:55,727 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 05:37:55,728 INFO L158 Benchmark]: Toolchain (without parser) took 4183.30ms. Allocated memory was 318.8MB in the beginning and 383.8MB in the end (delta: 65.0MB). Free memory was 293.9MB in the beginning and 291.7MB in the end (delta: 2.2MB). Peak memory consumption was 68.8MB. Max. memory is 16.0GB. [2023-08-24 05:37:55,728 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 318.8MB. Free memory is still 295.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 05:37:55,731 INFO L158 Benchmark]: CACSL2BoogieTranslator took 387.05ms. Allocated memory is still 318.8MB. Free memory was 293.5MB in the beginning and 272.3MB in the end (delta: 21.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 05:37:55,731 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.79ms. Allocated memory is still 318.8MB. Free memory was 272.3MB in the beginning and 270.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 05:37:55,732 INFO L158 Benchmark]: Boogie Preprocessor took 29.23ms. Allocated memory is still 318.8MB. Free memory was 270.2MB in the beginning and 268.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 05:37:55,732 INFO L158 Benchmark]: RCFGBuilder took 295.43ms. Allocated memory is still 318.8MB. Free memory was 268.9MB in the beginning and 255.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 05:37:55,732 INFO L158 Benchmark]: TraceAbstraction took 3416.40ms. Allocated memory was 318.8MB in the beginning and 383.8MB in the end (delta: 65.0MB). Free memory was 254.6MB in the beginning and 291.7MB in the end (delta: -37.1MB). Peak memory consumption was 31.1MB. Max. memory is 16.0GB. [2023-08-24 05:37:55,733 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 318.8MB. Free memory is still 295.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 387.05ms. Allocated memory is still 318.8MB. Free memory was 293.5MB in the beginning and 272.3MB in the end (delta: 21.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.79ms. Allocated memory is still 318.8MB. Free memory was 272.3MB in the beginning and 270.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.23ms. Allocated memory is still 318.8MB. Free memory was 270.2MB in the beginning and 268.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 295.43ms. Allocated memory is still 318.8MB. Free memory was 268.9MB in the beginning and 255.4MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 3416.40ms. Allocated memory was 318.8MB in the beginning and 383.8MB in the end (delta: 65.0MB). Free memory was 254.6MB in the beginning and 291.7MB in the end (delta: -37.1MB). Peak memory consumption was 31.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 80 PlacesBefore, 27 PlacesAfterwards, 71 TransitionsBefore, 18 TransitionsAfterwards, 1044 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 60 TotalNumberOfCompositions, 1811 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1079, independent: 1005, independent conditional: 0, independent unconditional: 1005, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 581, independent: 561, independent conditional: 0, independent unconditional: 561, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1079, independent: 444, independent conditional: 0, independent unconditional: 444, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 581, unknown conditional: 0, unknown unconditional: 581] , Statistics on independence cache: Total cache size (in pairs): 62, Positive cache size: 53, Positive conditional cache size: 0, Positive unconditional cache size: 53, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 109 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 58 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 58 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 301 IncrementalHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 12 mSDtfsCounter, 301 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=4, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 269 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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! [2023-08-24 05:37:55,758 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...