/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:19:09,179 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:19:09,269 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:19:09,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:19:09,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:19:09,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:19:09,278 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:19:09,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:19:09,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:19:09,313 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:19:09,313 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:19:09,313 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:19:09,314 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:19:09,315 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:19:09,315 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:19:09,315 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:19:09,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:19:09,316 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:19:09,316 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:19:09,316 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:19:09,316 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:19:09,317 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:19:09,317 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:19:09,317 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:19:09,318 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:19:09,318 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:19:09,319 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:19:09,319 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:19:09,319 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:19:09,319 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:19:09,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:19:09,320 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:19:09,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:19:09,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:19:09,321 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:19:09,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:19:09,321 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:19:09,321 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:19:09,321 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:19:09,322 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:19:09,322 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:19:09,322 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:19:09,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:19:09,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:19:09,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:19:09,587 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:19:09,588 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:19:09,589 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-subst.wvr_bound2.c [2023-08-04 08:19:10,793 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:19:10,985 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:19:10,986 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-subst.wvr_bound2.c [2023-08-04 08:19:10,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0577f8c57/fe86a21e2ff544acb56c353f60733718/FLAG51bc0dc57 [2023-08-04 08:19:11,015 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0577f8c57/fe86a21e2ff544acb56c353f60733718 [2023-08-04 08:19:11,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:19:11,023 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:19:11,026 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:19:11,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:19:11,029 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:19:11,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f79b5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11, skipping insertion in model container [2023-08-04 08:19:11,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,065 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:19:11,191 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-subst.wvr_bound2.c[3340,3353] [2023-08-04 08:19:11,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:19:11,207 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:19:11,232 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-subst.wvr_bound2.c[3340,3353] [2023-08-04 08:19:11,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:19:11,250 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:19:11,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11 WrapperNode [2023-08-04 08:19:11,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:19:11,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:19:11,252 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:19:11,252 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:19:11,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,266 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,294 INFO L138 Inliner]: procedures = 26, calls = 47, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 329 [2023-08-04 08:19:11,295 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:19:11,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:19:11,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:19:11,296 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:19:11,304 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,319 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,325 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,329 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,333 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:19:11,334 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:19:11,334 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:19:11,334 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:19:11,335 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (1/1) ... [2023-08-04 08:19:11,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:19:11,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:11,370 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) [2023-08-04 08:19:11,381 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 [2023-08-04 08:19:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:19:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:19:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:19:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:19:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:19:11,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:19:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:19:11,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:19:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:19:11,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:19:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:19:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:19:11,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:19:11,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:19:11,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:19:11,425 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:19:11,530 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:19:11,531 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:19:11,953 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:19:11,967 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:19:11,968 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 08:19:11,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:19:11 BoogieIcfgContainer [2023-08-04 08:19:11,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:19:11,972 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:19:11,972 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:19:11,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:19:11,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:19:11" (1/3) ... [2023-08-04 08:19:11,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4824208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:19:11, skipping insertion in model container [2023-08-04 08:19:11,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:11" (2/3) ... [2023-08-04 08:19:11,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4824208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:19:11, skipping insertion in model container [2023-08-04 08:19:11,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:19:11" (3/3) ... [2023-08-04 08:19:11,977 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-chromosome-subst.wvr_bound2.c [2023-08-04 08:19:11,983 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:19:11,989 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:19:11,989 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:19:11,989 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:19:12,115 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:19:12,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:12,452 INFO L124 PetriNetUnfolderBase]: 137/1022 cut-off events. [2023-08-04 08:19:12,452 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 08:19:12,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 1022 events. 137/1022 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5927 event pairs, 0 based on Foata normal form. 0/875 useless extension candidates. Maximal degree in co-relation 583. Up to 16 conditions per place. [2023-08-04 08:19:12,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:12,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:12,497 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:12,512 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:12,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:12,721 INFO L124 PetriNetUnfolderBase]: 137/1022 cut-off events. [2023-08-04 08:19:12,722 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 08:19:12,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 1022 events. 137/1022 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5927 event pairs, 0 based on Foata normal form. 0/875 useless extension candidates. Maximal degree in co-relation 583. Up to 16 conditions per place. [2023-08-04 08:19:12,769 INFO L119 LiptonReduction]: Number of co-enabled transitions 34560 [2023-08-04 08:19:20,992 INFO L134 LiptonReduction]: Checked pairs total: 44211 [2023-08-04 08:19:20,993 INFO L136 LiptonReduction]: Total number of compositions: 391 [2023-08-04 08:19:21,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:19:21,012 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=true, 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;@762abed3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:19:21,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:19:21,018 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:19:21,019 INFO L124 PetriNetUnfolderBase]: 7/56 cut-off events. [2023-08-04 08:19:21,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:21,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:21,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:21,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:21,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1983242296, now seen corresponding path program 1 times [2023-08-04 08:19:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:21,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542763040] [2023-08-04 08:19:21,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:21,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:19:21,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:21,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542763040] [2023-08-04 08:19:21,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542763040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:21,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:21,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:19:21,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636693667] [2023-08-04 08:19:21,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:21,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:21,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:21,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 763 [2023-08-04 08:19:21,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 63 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 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) [2023-08-04 08:19:21,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:21,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 763 [2023-08-04 08:19:21,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:22,452 INFO L124 PetriNetUnfolderBase]: 6720/9994 cut-off events. [2023-08-04 08:19:22,452 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2023-08-04 08:19:22,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19914 conditions, 9994 events. 6720/9994 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 54053 event pairs, 5080 based on Foata normal form. 216/7988 useless extension candidates. Maximal degree in co-relation 16601. Up to 9456 conditions per place. [2023-08-04 08:19:22,532 INFO L140 encePairwiseOnDemand]: 753/763 looper letters, 50 selfloop transitions, 6 changer transitions 3/63 dead transitions. [2023-08-04 08:19:22,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 280 flow [2023-08-04 08:19:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-08-04 08:19:22,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438619484491044 [2023-08-04 08:19:22,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-08-04 08:19:22,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-08-04 08:19:22,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:22,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-08-04 08:19:22,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 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) [2023-08-04 08:19:22,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:22,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:22,669 INFO L175 Difference]: Start difference. First operand has 53 places, 63 transitions, 168 flow. Second operand 3 states and 1016 transitions. [2023-08-04 08:19:22,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 280 flow [2023-08-04 08:19:22,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 280 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:19:22,679 INFO L231 Difference]: Finished difference. Result has 55 places, 60 transitions, 182 flow [2023-08-04 08:19:22,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=60} [2023-08-04 08:19:22,687 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-04 08:19:22,688 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 60 transitions, 182 flow [2023-08-04 08:19:22,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.3333333333333) internal successors, (964), 3 states have internal predecessors, (964), 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) [2023-08-04 08:19:22,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:22,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:22,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:19:22,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:22,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash 164301620, now seen corresponding path program 1 times [2023-08-04 08:19:22,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:22,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241336906] [2023-08-04 08:19:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:19:22,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:22,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241336906] [2023-08-04 08:19:22,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241336906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:22,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:22,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:19:22,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014328445] [2023-08-04 08:19:22,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:22,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:22,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:22,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:22,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:22,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 763 [2023-08-04 08:19:22,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 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) [2023-08-04 08:19:22,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:22,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 763 [2023-08-04 08:19:22,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:23,658 INFO L124 PetriNetUnfolderBase]: 6522/9624 cut-off events. [2023-08-04 08:19:23,658 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2023-08-04 08:19:23,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19181 conditions, 9624 events. 6522/9624 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 51185 event pairs, 3188 based on Foata normal form. 0/7479 useless extension candidates. Maximal degree in co-relation 19147. Up to 9134 conditions per place. [2023-08-04 08:19:23,719 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 59 selfloop transitions, 2 changer transitions 1/66 dead transitions. [2023-08-04 08:19:23,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 318 flow [2023-08-04 08:19:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1038 transitions. [2023-08-04 08:19:23,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4534731323722149 [2023-08-04 08:19:23,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1038 transitions. [2023-08-04 08:19:23,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1038 transitions. [2023-08-04 08:19:23,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:23,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1038 transitions. [2023-08-04 08:19:23,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 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) [2023-08-04 08:19:23,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:23,733 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:23,734 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 182 flow. Second operand 3 states and 1038 transitions. [2023-08-04 08:19:23,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 318 flow [2023-08-04 08:19:23,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 300 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:19:23,743 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 172 flow [2023-08-04 08:19:23,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-08-04 08:19:23,746 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-08-04 08:19:23,750 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 172 flow [2023-08-04 08:19:23,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.6666666666667) internal successors, (992), 3 states have internal predecessors, (992), 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) [2023-08-04 08:19:23,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:23,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:23,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:19:23,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:23,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1108814769, now seen corresponding path program 1 times [2023-08-04 08:19:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:23,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552981086] [2023-08-04 08:19:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:23,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:19:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:23,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552981086] [2023-08-04 08:19:23,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552981086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:23,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032523763] [2023-08-04 08:19:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:23,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:23,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:23,903 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) [2023-08-04 08:19:23,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:19:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:24,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:24,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:24,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:24,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032523763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:24,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:24,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:24,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867210169] [2023-08-04 08:19:24,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:24,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:24,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:24,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:24,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:24,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 763 [2023-08-04 08:19:24,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 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) [2023-08-04 08:19:24,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:24,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 763 [2023-08-04 08:19:24,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:24,766 INFO L124 PetriNetUnfolderBase]: 6352/9364 cut-off events. [2023-08-04 08:19:24,766 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-08-04 08:19:24,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18639 conditions, 9364 events. 6352/9364 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 49295 event pairs, 3162 based on Foata normal form. 0/7285 useless extension candidates. Maximal degree in co-relation 18600. Up to 8812 conditions per place. [2023-08-04 08:19:24,824 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 64 selfloop transitions, 2 changer transitions 1/71 dead transitions. [2023-08-04 08:19:24,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 328 flow [2023-08-04 08:19:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1043 transitions. [2023-08-04 08:19:24,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45565749235474007 [2023-08-04 08:19:24,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1043 transitions. [2023-08-04 08:19:24,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1043 transitions. [2023-08-04 08:19:24,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:24,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1043 transitions. [2023-08-04 08:19:24,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 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) [2023-08-04 08:19:24,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:24,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:24,904 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 172 flow. Second operand 3 states and 1043 transitions. [2023-08-04 08:19:24,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 328 flow [2023-08-04 08:19:24,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:19:24,908 INFO L231 Difference]: Finished difference. Result has 52 places, 60 transitions, 176 flow [2023-08-04 08:19:24,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=52, PETRI_TRANSITIONS=60} [2023-08-04 08:19:24,910 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2023-08-04 08:19:24,911 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 60 transitions, 176 flow [2023-08-04 08:19:24,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 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) [2023-08-04 08:19:24,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:24,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:24,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:25,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:25,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:25,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash 771261044, now seen corresponding path program 1 times [2023-08-04 08:19:25,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:25,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348684063] [2023-08-04 08:19:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:25,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:25,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:25,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348684063] [2023-08-04 08:19:25,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348684063] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:25,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023476923] [2023-08-04 08:19:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:25,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:25,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:25,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:19:25,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:19:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:25,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:25,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:19:25,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:25,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023476923] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:25,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:25,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:25,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311466742] [2023-08-04 08:19:25,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:25,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:25,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:25,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 763 [2023-08-04 08:19:25,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 60 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 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) [2023-08-04 08:19:25,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:25,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 763 [2023-08-04 08:19:25,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:26,198 INFO L124 PetriNetUnfolderBase]: 6327/9350 cut-off events. [2023-08-04 08:19:26,199 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-04 08:19:26,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18675 conditions, 9350 events. 6327/9350 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 48787 event pairs, 3101 based on Foata normal form. 0/7332 useless extension candidates. Maximal degree in co-relation 18636. Up to 8312 conditions per place. [2023-08-04 08:19:26,235 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 69 selfloop transitions, 2 changer transitions 1/76 dead transitions. [2023-08-04 08:19:26,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 352 flow [2023-08-04 08:19:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-04 08:19:26,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45784185233726515 [2023-08-04 08:19:26,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-04 08:19:26,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-04 08:19:26,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:26,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-04 08:19:26,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 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) [2023-08-04 08:19:26,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:26,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:26,247 INFO L175 Difference]: Start difference. First operand has 52 places, 60 transitions, 176 flow. Second operand 3 states and 1048 transitions. [2023-08-04 08:19:26,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 352 flow [2023-08-04 08:19:26,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:19:26,253 INFO L231 Difference]: Finished difference. Result has 53 places, 60 transitions, 180 flow [2023-08-04 08:19:26,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=53, PETRI_TRANSITIONS=60} [2023-08-04 08:19:26,256 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-08-04 08:19:26,256 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 60 transitions, 180 flow [2023-08-04 08:19:26,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 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) [2023-08-04 08:19:26,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:26,257 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-04 08:19:26,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:26,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 08:19:26,463 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:26,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1420668001, now seen corresponding path program 1 times [2023-08-04 08:19:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:26,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673367500] [2023-08-04 08:19:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:26,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:19:26,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673367500] [2023-08-04 08:19:26,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673367500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:26,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753733884] [2023-08-04 08:19:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:26,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:26,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:26,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:19:26,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:19:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:26,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:26,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:19:26,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:26,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753733884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:26,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:26,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:26,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010490465] [2023-08-04 08:19:26,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:26,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:26,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:26,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:26,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 763 [2023-08-04 08:19:26,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 60 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 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) [2023-08-04 08:19:26,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:26,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 763 [2023-08-04 08:19:26,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:27,056 INFO L124 PetriNetUnfolderBase]: 3627/5475 cut-off events. [2023-08-04 08:19:27,057 INFO L125 PetriNetUnfolderBase]: For 288/288 co-relation queries the response was YES. [2023-08-04 08:19:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11421 conditions, 5475 events. 3627/5475 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 25780 event pairs, 2089 based on Foata normal form. 0/4467 useless extension candidates. Maximal degree in co-relation 11381. Up to 4037 conditions per place. [2023-08-04 08:19:27,089 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 74 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 08:19:27,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 80 transitions, 378 flow [2023-08-04 08:19:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-08-04 08:19:27,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595893403232853 [2023-08-04 08:19:27,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-08-04 08:19:27,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-08-04 08:19:27,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:27,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-08-04 08:19:27,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 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) [2023-08-04 08:19:27,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:27,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:27,101 INFO L175 Difference]: Start difference. First operand has 53 places, 60 transitions, 180 flow. Second operand 3 states and 1052 transitions. [2023-08-04 08:19:27,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 80 transitions, 378 flow [2023-08-04 08:19:27,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:19:27,104 INFO L231 Difference]: Finished difference. Result has 54 places, 61 transitions, 188 flow [2023-08-04 08:19:27,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=61} [2023-08-04 08:19:27,105 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2023-08-04 08:19:27,105 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 61 transitions, 188 flow [2023-08-04 08:19:27,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 333.6666666666667) internal successors, (1001), 3 states have internal predecessors, (1001), 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) [2023-08-04 08:19:27,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:27,106 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-04 08:19:27,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:27,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:27,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:27,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash 912936063, now seen corresponding path program 1 times [2023-08-04 08:19:27,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:27,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050105292] [2023-08-04 08:19:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:27,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:19:27,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:27,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050105292] [2023-08-04 08:19:27,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050105292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:27,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593169383] [2023-08-04 08:19:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:27,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:27,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:27,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:19:27,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:19:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:27,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:27,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:19:27,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:27,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593169383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:27,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:27,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:27,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423689266] [2023-08-04 08:19:27,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:27,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:27,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:27,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:27,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:27,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 763 [2023-08-04 08:19:27,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 61 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 335.3333333333333) internal successors, (1006), 3 states have internal predecessors, (1006), 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) [2023-08-04 08:19:27,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:27,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 763 [2023-08-04 08:19:27,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:27,925 INFO L124 PetriNetUnfolderBase]: 2999/4476 cut-off events. [2023-08-04 08:19:27,925 INFO L125 PetriNetUnfolderBase]: For 649/649 co-relation queries the response was YES. [2023-08-04 08:19:27,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9718 conditions, 4476 events. 2999/4476 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19571 event pairs, 2081 based on Foata normal form. 0/3826 useless extension candidates. Maximal degree in co-relation 9677. Up to 3792 conditions per place. [2023-08-04 08:19:27,945 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 75 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-08-04 08:19:27,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 388 flow [2023-08-04 08:19:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1052 transitions. [2023-08-04 08:19:27,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595893403232853 [2023-08-04 08:19:27,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1052 transitions. [2023-08-04 08:19:27,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1052 transitions. [2023-08-04 08:19:27,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:27,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1052 transitions. [2023-08-04 08:19:27,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 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) [2023-08-04 08:19:27,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:27,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:27,957 INFO L175 Difference]: Start difference. First operand has 54 places, 61 transitions, 188 flow. Second operand 3 states and 1052 transitions. [2023-08-04 08:19:27,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 388 flow [2023-08-04 08:19:27,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:27,966 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 198 flow [2023-08-04 08:19:27,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2023-08-04 08:19:27,969 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-04 08:19:27,969 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 198 flow [2023-08-04 08:19:27,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.3333333333333) internal successors, (1006), 3 states have internal predecessors, (1006), 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) [2023-08-04 08:19:27,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:27,971 INFO L208 CegarLoopForPetriNet]: 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] [2023-08-04 08:19:27,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:28,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:28,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:28,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1363962581, now seen corresponding path program 1 times [2023-08-04 08:19:28,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:28,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482378706] [2023-08-04 08:19:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:28,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 08:19:28,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:28,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482378706] [2023-08-04 08:19:28,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482378706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:28,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189091459] [2023-08-04 08:19:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:28,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:28,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:28,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:19:28,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:19:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:28,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:28,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:19:28,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:28,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189091459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:28,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:28,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:28,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439344981] [2023-08-04 08:19:28,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:28,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:28,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:28,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 763 [2023-08-04 08:19:28,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 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) [2023-08-04 08:19:28,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:28,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 763 [2023-08-04 08:19:28,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:28,782 INFO L124 PetriNetUnfolderBase]: 2968/4402 cut-off events. [2023-08-04 08:19:28,782 INFO L125 PetriNetUnfolderBase]: For 482/482 co-relation queries the response was YES. [2023-08-04 08:19:28,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9651 conditions, 4402 events. 2968/4402 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19174 event pairs, 2310 based on Foata normal form. 0/3789 useless extension candidates. Maximal degree in co-relation 9609. Up to 4228 conditions per place. [2023-08-04 08:19:28,800 INFO L140 encePairwiseOnDemand]: 760/763 looper letters, 69 selfloop transitions, 2 changer transitions 3/78 dead transitions. [2023-08-04 08:19:28,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 78 transitions, 378 flow [2023-08-04 08:19:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:28,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1048 transitions. [2023-08-04 08:19:28,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45784185233726515 [2023-08-04 08:19:28,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1048 transitions. [2023-08-04 08:19:28,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1048 transitions. [2023-08-04 08:19:28,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:28,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1048 transitions. [2023-08-04 08:19:28,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 349.3333333333333) internal successors, (1048), 3 states have internal predecessors, (1048), 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) [2023-08-04 08:19:28,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:28,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 763.0) internal successors, (3052), 4 states have internal predecessors, (3052), 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) [2023-08-04 08:19:28,810 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 198 flow. Second operand 3 states and 1048 transitions. [2023-08-04 08:19:28,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 78 transitions, 378 flow [2023-08-04 08:19:28,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:28,825 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 196 flow [2023-08-04 08:19:28,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-04 08:19:28,826 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 5 predicate places. [2023-08-04 08:19:28,826 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 196 flow [2023-08-04 08:19:28,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 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) [2023-08-04 08:19:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:28,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:28,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 08:19:29,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:29,033 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:29,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1823266243, now seen corresponding path program 1 times [2023-08-04 08:19:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:29,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474434839] [2023-08-04 08:19:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:29,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:19:29,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:29,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474434839] [2023-08-04 08:19:29,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474434839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:29,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003062079] [2023-08-04 08:19:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:29,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:29,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:19:29,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:19:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:29,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:19:29,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:19:29,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:19:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003062079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:29,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:29,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:19:29,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509596310] [2023-08-04 08:19:29,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:29,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:19:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:19:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:19:29,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 763 [2023-08-04 08:19:29,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 196 flow. Second operand has 8 states, 8 states have (on average 313.625) internal successors, (2509), 8 states have internal predecessors, (2509), 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) [2023-08-04 08:19:29,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:29,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 763 [2023-08-04 08:19:29,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:29,524 INFO L124 PetriNetUnfolderBase]: 14/46 cut-off events. [2023-08-04 08:19:29,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:29,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 46 events. 14/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 58 event pairs, 0 based on Foata normal form. 8/49 useless extension candidates. Maximal degree in co-relation 117. Up to 20 conditions per place. [2023-08-04 08:19:29,524 INFO L140 encePairwiseOnDemand]: 754/763 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2023-08-04 08:19:29,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 174 flow [2023-08-04 08:19:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:19:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:19:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2499 transitions. [2023-08-04 08:19:29,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40940366972477066 [2023-08-04 08:19:29,531 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2499 transitions. [2023-08-04 08:19:29,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2499 transitions. [2023-08-04 08:19:29,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:29,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2499 transitions. [2023-08-04 08:19:29,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 312.375) internal successors, (2499), 8 states have internal predecessors, (2499), 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) [2023-08-04 08:19:29,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 763.0) internal successors, (6867), 9 states have internal predecessors, (6867), 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) [2023-08-04 08:19:29,549 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 763.0) internal successors, (6867), 9 states have internal predecessors, (6867), 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) [2023-08-04 08:19:29,549 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 196 flow. Second operand 8 states and 2499 transitions. [2023-08-04 08:19:29,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 174 flow [2023-08-04 08:19:29,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:29,551 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-04 08:19:29,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=763, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-04 08:19:29,553 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -23 predicate places. [2023-08-04 08:19:29,553 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-04 08:19:29,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 313.625) internal successors, (2509), 8 states have internal predecessors, (2509), 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) [2023-08-04 08:19:29,569 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:19:29,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:29,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:29,775 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:29,777 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:19:29,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:29,888 INFO L124 PetriNetUnfolderBase]: 137/1022 cut-off events. [2023-08-04 08:19:29,888 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 08:19:29,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 1022 events. 137/1022 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5927 event pairs, 0 based on Foata normal form. 0/875 useless extension candidates. Maximal degree in co-relation 583. Up to 16 conditions per place. [2023-08-04 08:19:29,897 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:29,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:29,904 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:29,904 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:29,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:29,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 786 flow [2023-08-04 08:19:30,008 INFO L124 PetriNetUnfolderBase]: 137/1022 cut-off events. [2023-08-04 08:19:30,008 INFO L125 PetriNetUnfolderBase]: For 36/40 co-relation queries the response was YES. [2023-08-04 08:19:30,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 1022 events. 137/1022 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5927 event pairs, 0 based on Foata normal form. 0/875 useless extension candidates. Maximal degree in co-relation 583. Up to 16 conditions per place. [2023-08-04 08:19:30,042 INFO L119 LiptonReduction]: Number of co-enabled transitions 34560 [2023-08-04 08:19:37,261 INFO L134 LiptonReduction]: Checked pairs total: 43125 [2023-08-04 08:19:37,262 INFO L136 LiptonReduction]: Total number of compositions: 381 [2023-08-04 08:19:37,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:19:37,263 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=true, 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;@762abed3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:19:37,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:19:37,266 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:19:37,266 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2023-08-04 08:19:37,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:37,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:37,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:37,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:19:37,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash 863266872, now seen corresponding path program 1 times [2023-08-04 08:19:37,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:37,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296086064] [2023-08-04 08:19:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:37,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:19:37,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:37,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296086064] [2023-08-04 08:19:37,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296086064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:37,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:37,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:19:37,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929264588] [2023-08-04 08:19:37,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:37,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:37,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:37,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:37,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:37,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 753 [2023-08-04 08:19:37,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 63 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 320.3333333333333) internal successors, (961), 3 states have internal predecessors, (961), 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) [2023-08-04 08:19:37,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:37,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 753 [2023-08-04 08:19:37,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:37,938 INFO L124 PetriNetUnfolderBase]: 6720/9982 cut-off events. [2023-08-04 08:19:37,938 INFO L125 PetriNetUnfolderBase]: For 583/583 co-relation queries the response was YES. [2023-08-04 08:19:37,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19926 conditions, 9982 events. 6720/9982 cut-off events. For 583/583 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 54263 event pairs, 5080 based on Foata normal form. 216/7976 useless extension candidates. Maximal degree in co-relation 16611. Up to 9456 conditions per place. [2023-08-04 08:19:37,960 INFO L140 encePairwiseOnDemand]: 743/753 looper letters, 30 selfloop transitions, 6 changer transitions 24/63 dead transitions. [2023-08-04 08:19:37,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 280 flow [2023-08-04 08:19:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1016 transitions. [2023-08-04 08:19:37,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44975652943780436 [2023-08-04 08:19:37,964 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1016 transitions. [2023-08-04 08:19:37,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1016 transitions. [2023-08-04 08:19:37,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:37,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1016 transitions. [2023-08-04 08:19:37,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.6666666666667) internal successors, (1016), 3 states have internal predecessors, (1016), 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) [2023-08-04 08:19:37,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 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) [2023-08-04 08:19:37,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 753.0) internal successors, (3012), 4 states have internal predecessors, (3012), 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) [2023-08-04 08:19:37,970 INFO L175 Difference]: Start difference. First operand has 53 places, 63 transitions, 168 flow. Second operand 3 states and 1016 transitions. [2023-08-04 08:19:37,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 280 flow [2023-08-04 08:19:37,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 280 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:19:37,973 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 119 flow [2023-08-04 08:19:37,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2023-08-04 08:19:37,974 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-04 08:19:37,974 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 119 flow [2023-08-04 08:19:37,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 320.3333333333333) internal successors, (961), 3 states have internal predecessors, (961), 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) [2023-08-04 08:19:37,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:37,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:37,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:19:37,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:19:37,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1589482313, now seen corresponding path program 1 times [2023-08-04 08:19:37,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:37,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507973489] [2023-08-04 08:19:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:37,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:38,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:38,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507973489] [2023-08-04 08:19:38,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507973489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:38,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226115240] [2023-08-04 08:19:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:38,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:38,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:38,033 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:19:38,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:19:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:38,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:19:38,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:38,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:38,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226115240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:38,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:38,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 08:19:38,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912717189] [2023-08-04 08:19:38,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:38,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:19:38,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:38,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:19:38,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:19:38,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 753 [2023-08-04 08:19:38,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 119 flow. Second operand has 8 states, 8 states have (on average 314.0) internal successors, (2512), 8 states have internal predecessors, (2512), 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) [2023-08-04 08:19:38,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:38,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 753 [2023-08-04 08:19:38,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:38,508 INFO L124 PetriNetUnfolderBase]: 1581/2398 cut-off events. [2023-08-04 08:19:38,508 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-04 08:19:38,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 2398 events. 1581/2398 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10352 event pairs, 1228 based on Foata normal form. 6/2011 useless extension candidates. Maximal degree in co-relation 4859. Up to 2316 conditions per place. [2023-08-04 08:19:38,515 INFO L140 encePairwiseOnDemand]: 746/753 looper letters, 30 selfloop transitions, 15 changer transitions 0/48 dead transitions. [2023-08-04 08:19:38,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 48 transitions, 245 flow [2023-08-04 08:19:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:19:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:19:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1926 transitions. [2023-08-04 08:19:38,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262948207171315 [2023-08-04 08:19:38,520 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1926 transitions. [2023-08-04 08:19:38,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1926 transitions. [2023-08-04 08:19:38,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:38,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1926 transitions. [2023-08-04 08:19:38,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 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) [2023-08-04 08:19:38,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 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) [2023-08-04 08:19:38,531 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 753.0) internal successors, (5271), 7 states have internal predecessors, (5271), 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) [2023-08-04 08:19:38,531 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 119 flow. Second operand 6 states and 1926 transitions. [2023-08-04 08:19:38,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 48 transitions, 245 flow [2023-08-04 08:19:38,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:38,533 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 209 flow [2023-08-04 08:19:38,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-04 08:19:38,533 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -6 predicate places. [2023-08-04 08:19:38,533 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 209 flow [2023-08-04 08:19:38,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 314.0) internal successors, (2512), 8 states have internal predecessors, (2512), 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) [2023-08-04 08:19:38,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:38,534 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:38,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:38,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:38,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:19:38,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash 954940152, now seen corresponding path program 2 times [2023-08-04 08:19:38,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:38,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240126329] [2023-08-04 08:19:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:38,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:38,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:38,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240126329] [2023-08-04 08:19:38,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240126329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:38,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229661539] [2023-08-04 08:19:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:19:38,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:38,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:19:38,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:19:39,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:19:39,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:19:39,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:19:39,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:39,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:19:39,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229661539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:39,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:39,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-04 08:19:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544012644] [2023-08-04 08:19:39,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:39,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:19:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:19:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:19:39,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 753 [2023-08-04 08:19:39,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 209 flow. Second operand has 13 states, 13 states have (on average 313.61538461538464) internal successors, (4077), 13 states have internal predecessors, (4077), 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) [2023-08-04 08:19:39,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:39,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 753 [2023-08-04 08:19:39,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:39,566 INFO L124 PetriNetUnfolderBase]: 1581/2401 cut-off events. [2023-08-04 08:19:39,566 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-04 08:19:39,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 2401 events. 1581/2401 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10360 event pairs, 1228 based on Foata normal form. 1/2008 useless extension candidates. Maximal degree in co-relation 4850. Up to 2316 conditions per place. [2023-08-04 08:19:39,573 INFO L140 encePairwiseOnDemand]: 746/753 looper letters, 30 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-04 08:19:39,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 323 flow [2023-08-04 08:19:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:19:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:19:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2235 transitions. [2023-08-04 08:19:39,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42401821286283436 [2023-08-04 08:19:39,577 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2235 transitions. [2023-08-04 08:19:39,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2235 transitions. [2023-08-04 08:19:39,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:39,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2235 transitions. [2023-08-04 08:19:39,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 319.2857142857143) internal successors, (2235), 7 states have internal predecessors, (2235), 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) [2023-08-04 08:19:39,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 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) [2023-08-04 08:19:39,588 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 753.0) internal successors, (6024), 8 states have internal predecessors, (6024), 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) [2023-08-04 08:19:39,588 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 209 flow. Second operand 7 states and 2235 transitions. [2023-08-04 08:19:39,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 323 flow [2023-08-04 08:19:39,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 299 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:39,590 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 253 flow [2023-08-04 08:19:39,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=753, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-08-04 08:19:39,591 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-08-04 08:19:39,591 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 253 flow [2023-08-04 08:19:39,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 313.61538461538464) internal successors, (4077), 13 states have internal predecessors, (4077), 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) [2023-08-04 08:19:39,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:39,592 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:39,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:39,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 08:19:39,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:19:39,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1149766135, now seen corresponding path program 3 times [2023-08-04 08:19:39,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:39,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728706751] [2023-08-04 08:19:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:39,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:19:39,869 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:19:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:19:40,036 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:19:40,036 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:19:40,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:19:40,036 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:19:40,037 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:19:40,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 08:19:40,037 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 08:19:40,037 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:19:40,038 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:19:40,038 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:19:40,117 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:19:40,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 464 places, 519 transitions, 1128 flow [2023-08-04 08:19:41,107 INFO L124 PetriNetUnfolderBase]: 1040/5512 cut-off events. [2023-08-04 08:19:41,107 INFO L125 PetriNetUnfolderBase]: For 602/632 co-relation queries the response was YES. [2023-08-04 08:19:41,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6186 conditions, 5512 events. 1040/5512 cut-off events. For 602/632 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 49132 event pairs, 22 based on Foata normal form. 0/4716 useless extension candidates. Maximal degree in co-relation 3310. Up to 192 conditions per place. [2023-08-04 08:19:41,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 464 places, 519 transitions, 1128 flow [2023-08-04 08:19:41,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 464 places, 519 transitions, 1128 flow [2023-08-04 08:19:41,289 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:41,290 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 464 places, 519 transitions, 1128 flow [2023-08-04 08:19:41,290 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 464 places, 519 transitions, 1128 flow [2023-08-04 08:19:41,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 464 places, 519 transitions, 1128 flow [2023-08-04 08:19:42,073 INFO L124 PetriNetUnfolderBase]: 1040/5512 cut-off events. [2023-08-04 08:19:42,074 INFO L125 PetriNetUnfolderBase]: For 602/632 co-relation queries the response was YES. [2023-08-04 08:19:42,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6186 conditions, 5512 events. 1040/5512 cut-off events. For 602/632 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 49132 event pairs, 22 based on Foata normal form. 0/4716 useless extension candidates. Maximal degree in co-relation 3310. Up to 192 conditions per place. [2023-08-04 08:19:42,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 111240 [2023-08-04 08:19:51,261 INFO L134 LiptonReduction]: Checked pairs total: 162560 [2023-08-04 08:19:51,261 INFO L136 LiptonReduction]: Total number of compositions: 532 [2023-08-04 08:19:51,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:19:51,265 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=true, 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;@762abed3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:19:51,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:19:51,269 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:19:51,269 INFO L124 PetriNetUnfolderBase]: 5/50 cut-off events. [2023-08-04 08:19:51,269 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:19:51,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:51,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:51,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:51,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1579857519, now seen corresponding path program 1 times [2023-08-04 08:19:51,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:51,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592479848] [2023-08-04 08:19:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:51,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:19:51,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:51,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592479848] [2023-08-04 08:19:51,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592479848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:51,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:51,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:19:51,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029088161] [2023-08-04 08:19:51,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:51,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:51,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:51,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 441 out of 1051 [2023-08-04 08:19:51,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 101 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 444.6666666666667) internal successors, (1334), 3 states have internal predecessors, (1334), 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) [2023-08-04 08:19:51,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:51,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 441 of 1051 [2023-08-04 08:19:51,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand