/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:55:47,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:55:47,194 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 20:55:47,198 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:55:47,198 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:55:47,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:55:47,240 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:55:47,240 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:55:47,240 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:55:47,240 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:55:47,240 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:55:47,240 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:55:47,240 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:55:47,240 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:55:47,240 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:55:47,241 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:55:47,241 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:55:47,241 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:55:47,242 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:55:47,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:55:47,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:55:47,243 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 20:55:47,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:55:47,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:55:47,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:55:47,454 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:55:47,454 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:55:47,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2025-04-13 20:55:48,715 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b77b67a/40c8a0be230c47758c9b4a6adcd49c82/FLAGce202f21f [2025-04-13 20:55:48,895 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:55:48,895 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c [2025-04-13 20:55:48,902 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b77b67a/40c8a0be230c47758c9b4a6adcd49c82/FLAGce202f21f [2025-04-13 20:55:49,716 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b77b67a/40c8a0be230c47758c9b4a6adcd49c82 [2025-04-13 20:55:49,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:55:49,720 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:55:49,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:55:49,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:55:49,724 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:55:49,724 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:49,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6742836e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49, skipping insertion in model container [2025-04-13 20:55:49,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:49,735 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:55:49,883 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c[3146,3159] [2025-04-13 20:55:49,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:55:49,906 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:55:49,936 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive.wvr.c[3146,3159] [2025-04-13 20:55:49,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:55:49,959 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:55:49,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49 WrapperNode [2025-04-13 20:55:49,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:55:49,960 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:55:49,960 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:55:49,960 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:55:49,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:49,971 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:49,992 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 139 [2025-04-13 20:55:49,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:55:49,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:55:49,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:55:49,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:55:49,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:49,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,000 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,019 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-04-13 20:55:50,019 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,019 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,029 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,032 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,037 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:55:50,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:55:50,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:55:50,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:55:50,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (1/1) ... [2025-04-13 20:55:50,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:55:50,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:55:50,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 20:55:50,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:55:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:55:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-13 20:55:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:55:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 20:55:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 20:55:50,094 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 20:55:50,175 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:55:50,177 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:55:50,377 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:55:50,378 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:55:50,378 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:55:50,539 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:55:50,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:55:50 BoogieIcfgContainer [2025-04-13 20:55:50,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:55:50,541 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:55:50,541 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:55:50,544 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:55:50,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:55:49" (1/3) ... [2025-04-13 20:55:50,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c45d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:55:50, skipping insertion in model container [2025-04-13 20:55:50,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:55:49" (2/3) ... [2025-04-13 20:55:50,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c45d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:55:50, skipping insertion in model container [2025-04-13 20:55:50,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:55:50" (3/3) ... [2025-04-13 20:55:50,545 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2025-04-13 20:55:50,556 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:55:50,557 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive.wvr.c that has 4 procedures, 32 locations, 32 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 20:55:50,557 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:55:50,608 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-13 20:55:50,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 35 transitions, 91 flow [2025-04-13 20:55:50,659 INFO L116 PetriNetUnfolderBase]: 4/32 cut-off events. [2025-04-13 20:55:50,660 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:55:50,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 32 events. 4/32 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2025-04-13 20:55:50,663 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 35 transitions, 91 flow [2025-04-13 20:55:50,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 31 transitions, 80 flow [2025-04-13 20:55:50,669 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:55:50,676 INFO L340 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@65cb0471, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:55:50,677 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 20:55:50,685 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:55:50,685 INFO L116 PetriNetUnfolderBase]: 4/30 cut-off events. [2025-04-13 20:55:50,685 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:55:50,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:50,686 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:55:50,686 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:50,689 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1699220779, now seen corresponding path program 1 times [2025-04-13 20:55:50,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:50,694 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668240331] [2025-04-13 20:55:50,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:55:50,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:50,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:55:50,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:55:50,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:55:50,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:51,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:51,131 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668240331] [2025-04-13 20:55:51,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668240331] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:55:51,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:55:51,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:55:51,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567580503] [2025-04-13 20:55:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:55:51,139 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:55:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:51,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:55:51,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:55:51,196 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-04-13 20:55:51,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2025-04-13 20:55:51,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:51,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-04-13 20:55:51,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:51,514 INFO L116 PetriNetUnfolderBase]: 708/1116 cut-off events. [2025-04-13 20:55:51,514 INFO L117 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2025-04-13 20:55:51,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2190 conditions, 1116 events. 708/1116 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5012 event pairs, 66 based on Foata normal form. 100/1035 useless extension candidates. Maximal degree in co-relation 2119. Up to 376 conditions per place. [2025-04-13 20:55:51,522 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 52 selfloop transitions, 4 changer transitions 5/68 dead transitions. [2025-04-13 20:55:51,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 68 transitions, 288 flow [2025-04-13 20:55:51,523 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:55:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:55:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-04-13 20:55:51,530 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6457142857142857 [2025-04-13 20:55:51,531 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 80 flow. Second operand 5 states and 113 transitions. [2025-04-13 20:55:51,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 68 transitions, 288 flow [2025-04-13 20:55:51,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 268 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-13 20:55:51,541 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 88 flow [2025-04-13 20:55:51,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2025-04-13 20:55:51,545 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2025-04-13 20:55:51,545 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 88 flow [2025-04-13 20:55:51,545 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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) [2025-04-13 20:55:51,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:51,545 INFO L206 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] [2025-04-13 20:55:51,545 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:55:51,545 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:51,546 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1587533106, now seen corresponding path program 1 times [2025-04-13 20:55:51,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:51,547 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572507251] [2025-04-13 20:55:51,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:55:51,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:51,556 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-13 20:55:51,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-13 20:55:51,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:55:51,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:51,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:51,615 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572507251] [2025-04-13 20:55:51,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572507251] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:55:51,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:55:51,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 20:55:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46621881] [2025-04-13 20:55:51,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:55:51,616 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:55:51,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:51,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:55:51,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:55:51,616 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-04-13 20:55:51,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2025-04-13 20:55:51,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:51,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-04-13 20:55:51,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:51,676 INFO L116 PetriNetUnfolderBase]: 158/307 cut-off events. [2025-04-13 20:55:51,676 INFO L117 PetriNetUnfolderBase]: For 222/290 co-relation queries the response was YES. [2025-04-13 20:55:51,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 307 events. 158/307 cut-off events. For 222/290 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1164 event pairs, 61 based on Foata normal form. 86/351 useless extension candidates. Maximal degree in co-relation 184. Up to 213 conditions per place. [2025-04-13 20:55:51,679 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 26 selfloop transitions, 3 changer transitions 1/40 dead transitions. [2025-04-13 20:55:51,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 40 transitions, 165 flow [2025-04-13 20:55:51,680 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:55:51,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:55:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2025-04-13 20:55:51,680 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2025-04-13 20:55:51,680 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 88 flow. Second operand 3 states and 69 transitions. [2025-04-13 20:55:51,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 40 transitions, 165 flow [2025-04-13 20:55:51,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 20:55:51,681 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 103 flow [2025-04-13 20:55:51,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-04-13 20:55:51,682 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2025-04-13 20:55:51,682 INFO L485 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 103 flow [2025-04-13 20:55:51,682 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2025-04-13 20:55:51,682 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:51,682 INFO L206 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] [2025-04-13 20:55:51,682 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:55:51,682 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:51,683 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:51,683 INFO L85 PathProgramCache]: Analyzing trace with hash 267355807, now seen corresponding path program 1 times [2025-04-13 20:55:51,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:51,683 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186879463] [2025-04-13 20:55:51,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:55:51,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:51,694 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-04-13 20:55:51,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 20:55:51,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:55:51,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:51,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:51,817 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186879463] [2025-04-13 20:55:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186879463] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:55:51,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:55:51,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:55:51,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915009386] [2025-04-13 20:55:51,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:55:51,817 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:55:51,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:51,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:55:51,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:55:51,818 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-04-13 20:55:51,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2025-04-13 20:55:51,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:51,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-04-13 20:55:51,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:51,889 INFO L116 PetriNetUnfolderBase]: 164/336 cut-off events. [2025-04-13 20:55:51,890 INFO L117 PetriNetUnfolderBase]: For 225/316 co-relation queries the response was YES. [2025-04-13 20:55:51,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 336 events. 164/336 cut-off events. For 225/316 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1330 event pairs, 103 based on Foata normal form. 91/383 useless extension candidates. Maximal degree in co-relation 265. Up to 250 conditions per place. [2025-04-13 20:55:51,892 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 23 selfloop transitions, 2 changer transitions 9/44 dead transitions. [2025-04-13 20:55:51,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 44 transitions, 194 flow [2025-04-13 20:55:51,892 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:55:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:55:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2025-04-13 20:55:51,895 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2025-04-13 20:55:51,895 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 103 flow. Second operand 4 states and 85 transitions. [2025-04-13 20:55:51,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 44 transitions, 194 flow [2025-04-13 20:55:51,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:55:51,896 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 116 flow [2025-04-13 20:55:51,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2025-04-13 20:55:51,897 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2025-04-13 20:55:51,897 INFO L485 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 116 flow [2025-04-13 20:55:51,897 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2025-04-13 20:55:51,897 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:51,897 INFO L206 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] [2025-04-13 20:55:51,899 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:55:51,899 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:51,900 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1848614144, now seen corresponding path program 1 times [2025-04-13 20:55:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:51,900 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289156012] [2025-04-13 20:55:51,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:55:51,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:51,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 20:55:51,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 20:55:51,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:55:51,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:55:52,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:52,073 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289156012] [2025-04-13 20:55:52,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289156012] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:55:52,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:55:52,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:55:52,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674883193] [2025-04-13 20:55:52,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:55:52,074 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:55:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:52,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:55:52,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:55:52,085 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-04-13 20:55:52,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2025-04-13 20:55:52,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:52,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-04-13 20:55:52,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:52,171 INFO L116 PetriNetUnfolderBase]: 199/351 cut-off events. [2025-04-13 20:55:52,171 INFO L117 PetriNetUnfolderBase]: For 235/303 co-relation queries the response was YES. [2025-04-13 20:55:52,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910 conditions, 351 events. 199/351 cut-off events. For 235/303 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1120 event pairs, 39 based on Foata normal form. 80/408 useless extension candidates. Maximal degree in co-relation 894. Up to 168 conditions per place. [2025-04-13 20:55:52,173 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 35 selfloop transitions, 3 changer transitions 0/45 dead transitions. [2025-04-13 20:55:52,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 223 flow [2025-04-13 20:55:52,173 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:55:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:55:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2025-04-13 20:55:52,174 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2025-04-13 20:55:52,174 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 116 flow. Second operand 4 states and 75 transitions. [2025-04-13 20:55:52,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 223 flow [2025-04-13 20:55:52,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 211 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-04-13 20:55:52,175 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 118 flow [2025-04-13 20:55:52,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2025-04-13 20:55:52,176 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2025-04-13 20:55:52,176 INFO L485 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 118 flow [2025-04-13 20:55:52,176 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2025-04-13 20:55:52,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:52,176 INFO L206 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] [2025-04-13 20:55:52,176 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:55:52,176 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:52,177 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:52,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1568350582, now seen corresponding path program 2 times [2025-04-13 20:55:52,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:52,177 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982476664] [2025-04-13 20:55:52,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:55:52,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:52,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-04-13 20:55:52,193 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 20:55:52,193 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:55:52,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:55:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:52,313 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982476664] [2025-04-13 20:55:52,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982476664] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:55:52,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545196846] [2025-04-13 20:55:52,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:55:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:52,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:55:52,316 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) [2025-04-13 20:55:52,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 20:55:52,358 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-04-13 20:55:52,377 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 20:55:52,377 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:55:52,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:52,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 20:55:52,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:55:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:55:52,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:55:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:55:52,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545196846] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:55:52,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:55:52,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2025-04-13 20:55:52,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914441146] [2025-04-13 20:55:52,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:55:52,711 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-13 20:55:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:52,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-13 20:55:52,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-04-13 20:55:52,729 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2025-04-13 20:55:52,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 118 flow. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 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) [2025-04-13 20:55:52,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:52,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2025-04-13 20:55:52,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:53,248 INFO L116 PetriNetUnfolderBase]: 1086/1654 cut-off events. [2025-04-13 20:55:53,248 INFO L117 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2025-04-13 20:55:53,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1654 events. 1086/1654 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6764 event pairs, 39 based on Foata normal form. 116/1648 useless extension candidates. Maximal degree in co-relation 3922. Up to 338 conditions per place. [2025-04-13 20:55:53,254 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 90 selfloop transitions, 20 changer transitions 33/147 dead transitions. [2025-04-13 20:55:53,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 147 transitions, 707 flow [2025-04-13 20:55:53,254 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-13 20:55:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-13 20:55:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 265 transitions. [2025-04-13 20:55:53,255 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44537815126050423 [2025-04-13 20:55:53,255 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 118 flow. Second operand 17 states and 265 transitions. [2025-04-13 20:55:53,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 147 transitions, 707 flow [2025-04-13 20:55:53,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 147 transitions, 699 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-13 20:55:53,258 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 276 flow [2025-04-13 20:55:53,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=276, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2025-04-13 20:55:53,258 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2025-04-13 20:55:53,259 INFO L485 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 276 flow [2025-04-13 20:55:53,259 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 11 states have internal predecessors, (142), 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) [2025-04-13 20:55:53,259 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:53,259 INFO L206 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] [2025-04-13 20:55:53,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-13 20:55:53,459 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:53,460 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:53,460 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1638401586, now seen corresponding path program 3 times [2025-04-13 20:55:53,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:53,460 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678760937] [2025-04-13 20:55:53,460 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:55:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:53,466 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 2 equivalence classes. [2025-04-13 20:55:53,482 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 28 of 29 statements. [2025-04-13 20:55:53,482 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:55:53,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:55:53,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:53,712 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678760937] [2025-04-13 20:55:53,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678760937] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:55:53,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:55:53,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-04-13 20:55:53,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992452480] [2025-04-13 20:55:53,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:55:53,713 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:55:53,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:53,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:55:53,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:55:53,748 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-04-13 20:55:53,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 276 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2025-04-13 20:55:53,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:53,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-04-13 20:55:53,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:54,105 INFO L116 PetriNetUnfolderBase]: 1127/1840 cut-off events. [2025-04-13 20:55:54,105 INFO L117 PetriNetUnfolderBase]: For 6461/6563 co-relation queries the response was YES. [2025-04-13 20:55:54,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6843 conditions, 1840 events. 1127/1840 cut-off events. For 6461/6563 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9198 event pairs, 209 based on Foata normal form. 100/1718 useless extension candidates. Maximal degree in co-relation 6811. Up to 588 conditions per place. [2025-04-13 20:55:54,116 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 80 selfloop transitions, 13 changer transitions 19/125 dead transitions. [2025-04-13 20:55:54,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 125 transitions, 915 flow [2025-04-13 20:55:54,116 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 20:55:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 20:55:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2025-04-13 20:55:54,117 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5650793650793651 [2025-04-13 20:55:54,117 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 276 flow. Second operand 9 states and 178 transitions. [2025-04-13 20:55:54,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 125 transitions, 915 flow [2025-04-13 20:55:54,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 125 transitions, 866 flow, removed 24 selfloop flow, removed 4 redundant places. [2025-04-13 20:55:54,136 INFO L231 Difference]: Finished difference. Result has 70 places, 58 transitions, 335 flow [2025-04-13 20:55:54,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=335, PETRI_PLACES=70, PETRI_TRANSITIONS=58} [2025-04-13 20:55:54,138 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 33 predicate places. [2025-04-13 20:55:54,138 INFO L485 AbstractCegarLoop]: Abstraction has has 70 places, 58 transitions, 335 flow [2025-04-13 20:55:54,138 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 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) [2025-04-13 20:55:54,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:54,138 INFO L206 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] [2025-04-13 20:55:54,138 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 20:55:54,138 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:54,139 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:54,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1700836182, now seen corresponding path program 1 times [2025-04-13 20:55:54,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:54,139 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734622403] [2025-04-13 20:55:54,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:55:54,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:54,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 20:55:54,155 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 20:55:54,155 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:55:54,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:55:54,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:54,211 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734622403] [2025-04-13 20:55:54,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734622403] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:55:54,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:55:54,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:55:54,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542130182] [2025-04-13 20:55:54,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:55:54,211 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:55:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:54,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:55:54,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:55:54,213 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-04-13 20:55:54,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 58 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2025-04-13 20:55:54,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:54,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-04-13 20:55:54,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:54,343 INFO L116 PetriNetUnfolderBase]: 672/1133 cut-off events. [2025-04-13 20:55:54,343 INFO L117 PetriNetUnfolderBase]: For 3948/4013 co-relation queries the response was YES. [2025-04-13 20:55:54,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4234 conditions, 1133 events. 672/1133 cut-off events. For 3948/4013 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5287 event pairs, 244 based on Foata normal form. 17/968 useless extension candidates. Maximal degree in co-relation 4202. Up to 899 conditions per place. [2025-04-13 20:55:54,349 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 43 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2025-04-13 20:55:54,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 458 flow [2025-04-13 20:55:54,350 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:55:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:55:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2025-04-13 20:55:54,350 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2025-04-13 20:55:54,350 INFO L175 Difference]: Start difference. First operand has 70 places, 58 transitions, 335 flow. Second operand 3 states and 69 transitions. [2025-04-13 20:55:54,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 458 flow [2025-04-13 20:55:54,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 437 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-04-13 20:55:54,354 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 296 flow [2025-04-13 20:55:54,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2025-04-13 20:55:54,354 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 31 predicate places. [2025-04-13 20:55:54,354 INFO L485 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 296 flow [2025-04-13 20:55:54,354 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2025-04-13 20:55:54,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:54,355 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2025-04-13 20:55:54,355 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-13 20:55:54,355 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:54,355 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:54,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1398039321, now seen corresponding path program 4 times [2025-04-13 20:55:54,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:54,355 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002297122] [2025-04-13 20:55:54,355 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:55:54,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:54,360 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-04-13 20:55:54,365 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-04-13 20:55:54,365 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:55:54,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:55:54,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:54,408 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002297122] [2025-04-13 20:55:54,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002297122] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:55:54,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:55:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:55:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874840010] [2025-04-13 20:55:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:55:54,408 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:55:54,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:54,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:55:54,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:55:54,408 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-04-13 20:55:54,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2025-04-13 20:55:54,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:54,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-04-13 20:55:54,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:54,580 INFO L116 PetriNetUnfolderBase]: 1173/2139 cut-off events. [2025-04-13 20:55:54,580 INFO L117 PetriNetUnfolderBase]: For 8500/8783 co-relation queries the response was YES. [2025-04-13 20:55:54,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8029 conditions, 2139 events. 1173/2139 cut-off events. For 8500/8783 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12197 event pairs, 420 based on Foata normal form. 113/2022 useless extension candidates. Maximal degree in co-relation 7997. Up to 708 conditions per place. [2025-04-13 20:55:54,595 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 66 selfloop transitions, 10 changer transitions 0/98 dead transitions. [2025-04-13 20:55:54,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 701 flow [2025-04-13 20:55:54,596 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:55:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:55:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2025-04-13 20:55:54,596 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7214285714285714 [2025-04-13 20:55:54,596 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 296 flow. Second operand 4 states and 101 transitions. [2025-04-13 20:55:54,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 701 flow [2025-04-13 20:55:54,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 690 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-13 20:55:54,605 INFO L231 Difference]: Finished difference. Result has 71 places, 62 transitions, 377 flow [2025-04-13 20:55:54,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=377, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2025-04-13 20:55:54,606 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2025-04-13 20:55:54,606 INFO L485 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 377 flow [2025-04-13 20:55:54,606 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2025-04-13 20:55:54,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:54,606 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:55:54,606 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-13 20:55:54,606 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:54,607 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash -43953610, now seen corresponding path program 5 times [2025-04-13 20:55:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:54,607 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138838030] [2025-04-13 20:55:54,607 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:55:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:54,614 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-04-13 20:55:54,623 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-04-13 20:55:54,623 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:55:54,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:55:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:54,707 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138838030] [2025-04-13 20:55:54,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138838030] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:55:54,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:55:54,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:55:54,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988351360] [2025-04-13 20:55:54,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:55:54,707 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:55:54,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:54,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:55:54,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:55:54,710 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-04-13 20:55:54,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2025-04-13 20:55:54,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:54,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-04-13 20:55:54,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:54,979 INFO L116 PetriNetUnfolderBase]: 1868/3417 cut-off events. [2025-04-13 20:55:54,979 INFO L117 PetriNetUnfolderBase]: For 15762/16155 co-relation queries the response was YES. [2025-04-13 20:55:54,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13219 conditions, 3417 events. 1868/3417 cut-off events. For 15762/16155 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21108 event pairs, 513 based on Foata normal form. 275/3425 useless extension candidates. Maximal degree in co-relation 13185. Up to 1393 conditions per place. [2025-04-13 20:55:55,001 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 58 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2025-04-13 20:55:55,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 82 transitions, 622 flow [2025-04-13 20:55:55,002 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:55:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:55:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2025-04-13 20:55:55,002 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2025-04-13 20:55:55,003 INFO L175 Difference]: Start difference. First operand has 71 places, 62 transitions, 377 flow. Second operand 4 states and 86 transitions. [2025-04-13 20:55:55,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 82 transitions, 622 flow [2025-04-13 20:55:55,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 614 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-04-13 20:55:55,012 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 406 flow [2025-04-13 20:55:55,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=406, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2025-04-13 20:55:55,013 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 39 predicate places. [2025-04-13 20:55:55,013 INFO L485 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 406 flow [2025-04-13 20:55:55,013 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2025-04-13 20:55:55,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:55,013 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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] [2025-04-13 20:55:55,013 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-13 20:55:55,014 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:55,014 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:55,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1040897194, now seen corresponding path program 1 times [2025-04-13 20:55:55,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:55,014 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083629451] [2025-04-13 20:55:55,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:55:55,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:55,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-04-13 20:55:55,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-04-13 20:55:55,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:55:55,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:55,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:55,133 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083629451] [2025-04-13 20:55:55,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083629451] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:55:55,133 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897687100] [2025-04-13 20:55:55,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:55:55,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:55,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:55:55,135 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) [2025-04-13 20:55:55,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 20:55:55,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-04-13 20:55:55,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-04-13 20:55:55,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:55:55,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:55,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-13 20:55:55,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:55:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:55,289 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:55:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897687100] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:55:55,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:55:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-04-13 20:55:55,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761425109] [2025-04-13 20:55:55,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:55:55,376 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:55:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:55,376 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:55:55,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:55:55,377 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-04-13 20:55:55,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 406 flow. Second operand has 15 states, 15 states have (on average 15.4) internal successors, (231), 15 states have internal predecessors, (231), 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) [2025-04-13 20:55:55,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:55,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-04-13 20:55:55,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:55,640 INFO L116 PetriNetUnfolderBase]: 1406/2870 cut-off events. [2025-04-13 20:55:55,640 INFO L117 PetriNetUnfolderBase]: For 13414/13758 co-relation queries the response was YES. [2025-04-13 20:55:55,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11592 conditions, 2870 events. 1406/2870 cut-off events. For 13414/13758 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18617 event pairs, 1002 based on Foata normal form. 89/2712 useless extension candidates. Maximal degree in co-relation 11146. Up to 2061 conditions per place. [2025-04-13 20:55:55,657 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 38 selfloop transitions, 3 changer transitions 18/82 dead transitions. [2025-04-13 20:55:55,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 609 flow [2025-04-13 20:55:55,658 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:55:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:55:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2025-04-13 20:55:55,658 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2025-04-13 20:55:55,659 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 406 flow. Second operand 7 states and 132 transitions. [2025-04-13 20:55:55,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 609 flow [2025-04-13 20:55:55,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 603 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-04-13 20:55:55,668 INFO L231 Difference]: Finished difference. Result has 85 places, 64 transitions, 425 flow [2025-04-13 20:55:55,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=425, PETRI_PLACES=85, PETRI_TRANSITIONS=64} [2025-04-13 20:55:55,669 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2025-04-13 20:55:55,669 INFO L485 AbstractCegarLoop]: Abstraction has has 85 places, 64 transitions, 425 flow [2025-04-13 20:55:55,669 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.4) internal successors, (231), 15 states have internal predecessors, (231), 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) [2025-04-13 20:55:55,669 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:55,669 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2025-04-13 20:55:55,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 20:55:55,869 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-04-13 20:55:55,870 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:55:55,870 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:55,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1180006845, now seen corresponding path program 2 times [2025-04-13 20:55:55,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:55,870 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45847678] [2025-04-13 20:55:55,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:55:55,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:55,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-13 20:55:55,915 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 20:55:55,915 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:55:55,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:56,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:56,699 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45847678] [2025-04-13 20:55:56,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45847678] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:55:56,699 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310682261] [2025-04-13 20:55:56,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:55:56,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:56,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:55:56,701 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) [2025-04-13 20:55:56,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 20:55:56,742 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-13 20:55:56,763 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 20:55:56,763 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:55:56,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:56,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-04-13 20:55:56,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:55:56,839 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:55:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:57,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:55:58,131 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2025-04-13 20:55:58,153 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:55:58,153 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 200 [2025-04-13 20:55:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:58,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310682261] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:55:58,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:55:58,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 16] total 44 [2025-04-13 20:55:58,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397571979] [2025-04-13 20:55:58,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:55:58,770 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-04-13 20:55:58,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:58,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-04-13 20:55:58,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2025-04-13 20:55:58,825 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2025-04-13 20:55:58,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 64 transitions, 425 flow. Second operand has 45 states, 45 states have (on average 8.133333333333333) internal successors, (366), 45 states have internal predecessors, (366), 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) [2025-04-13 20:55:58,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:58,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2025-04-13 20:55:58,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:56:11,638 INFO L116 PetriNetUnfolderBase]: 24123/38307 cut-off events. [2025-04-13 20:56:11,639 INFO L117 PetriNetUnfolderBase]: For 168978/168978 co-relation queries the response was YES. [2025-04-13 20:56:11,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153239 conditions, 38307 events. 24123/38307 cut-off events. For 168978/168978 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 270468 event pairs, 2015 based on Foata normal form. 2716/41017 useless extension candidates. Maximal degree in co-relation 153197. Up to 6203 conditions per place. [2025-04-13 20:56:11,833 INFO L140 encePairwiseOnDemand]: 19/35 looper letters, 1179 selfloop transitions, 582 changer transitions 370/2134 dead transitions. [2025-04-13 20:56:11,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 2134 transitions, 17164 flow [2025-04-13 20:56:11,834 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2025-04-13 20:56:11,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2025-04-13 20:56:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 3128 transitions. [2025-04-13 20:56:11,842 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.390268247036806 [2025-04-13 20:56:11,842 INFO L175 Difference]: Start difference. First operand has 85 places, 64 transitions, 425 flow. Second operand 229 states and 3128 transitions. [2025-04-13 20:56:11,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 2134 transitions, 17164 flow [2025-04-13 20:56:12,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 2134 transitions, 16958 flow, removed 101 selfloop flow, removed 5 redundant places. [2025-04-13 20:56:12,030 INFO L231 Difference]: Finished difference. Result has 385 places, 685 transitions, 7519 flow [2025-04-13 20:56:12,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=229, PETRI_FLOW=7519, PETRI_PLACES=385, PETRI_TRANSITIONS=685} [2025-04-13 20:56:12,031 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 348 predicate places. [2025-04-13 20:56:12,031 INFO L485 AbstractCegarLoop]: Abstraction has has 385 places, 685 transitions, 7519 flow [2025-04-13 20:56:12,031 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 8.133333333333333) internal successors, (366), 45 states have internal predecessors, (366), 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) [2025-04-13 20:56:12,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:56:12,031 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2025-04-13 20:56:12,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 20:56:12,232 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:12,232 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:56:12,232 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:56:12,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1088927187, now seen corresponding path program 3 times [2025-04-13 20:56:12,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:56:12,233 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066668586] [2025-04-13 20:56:12,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:56:12,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:56:12,239 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 2 equivalence classes. [2025-04-13 20:56:12,264 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 20:56:12,264 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:56:12,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:56:12,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:56:12,798 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066668586] [2025-04-13 20:56:12,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066668586] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:56:12,798 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185111642] [2025-04-13 20:56:12,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:56:12,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:12,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:56:12,800 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) [2025-04-13 20:56:12,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 20:56:12,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 2 equivalence classes. [2025-04-13 20:56:12,861 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 20:56:12,861 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:56:12,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:12,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-04-13 20:56:12,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:56:12,920 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:56:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:56:13,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:56:13,806 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2025-04-13 20:56:13,829 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:56:13,829 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 208 [2025-04-13 20:56:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:56:14,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185111642] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:56:14,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:56:14,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2025-04-13 20:56:14,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453637083] [2025-04-13 20:56:14,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:56:14,142 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:56:14,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:56:14,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:56:14,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:56:14,209 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2025-04-13 20:56:14,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 685 transitions, 7519 flow. Second operand has 39 states, 39 states have (on average 9.205128205128204) internal successors, (359), 39 states have internal predecessors, (359), 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) [2025-04-13 20:56:14,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:56:14,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2025-04-13 20:56:14,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:56:22,160 INFO L116 PetriNetUnfolderBase]: 19164/32460 cut-off events. [2025-04-13 20:56:22,161 INFO L117 PetriNetUnfolderBase]: For 2096814/2096830 co-relation queries the response was YES. [2025-04-13 20:56:22,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211972 conditions, 32460 events. 19164/32460 cut-off events. For 2096814/2096830 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 245490 event pairs, 3459 based on Foata normal form. 1068/33503 useless extension candidates. Maximal degree in co-relation 190866. Up to 8432 conditions per place. [2025-04-13 20:56:22,614 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 884 selfloop transitions, 263 changer transitions 482/1635 dead transitions. [2025-04-13 20:56:22,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1635 transitions, 20066 flow [2025-04-13 20:56:22,615 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-04-13 20:56:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2025-04-13 20:56:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 827 transitions. [2025-04-13 20:56:22,619 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4145363408521303 [2025-04-13 20:56:22,619 INFO L175 Difference]: Start difference. First operand has 385 places, 685 transitions, 7519 flow. Second operand 57 states and 827 transitions. [2025-04-13 20:56:22,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1635 transitions, 20066 flow [2025-04-13 20:56:28,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 1635 transitions, 15668 flow, removed 1795 selfloop flow, removed 22 redundant places. [2025-04-13 20:56:28,353 INFO L231 Difference]: Finished difference. Result has 443 places, 794 transitions, 7533 flow [2025-04-13 20:56:28,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5311, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=7533, PETRI_PLACES=443, PETRI_TRANSITIONS=794} [2025-04-13 20:56:28,354 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 406 predicate places. [2025-04-13 20:56:28,354 INFO L485 AbstractCegarLoop]: Abstraction has has 443 places, 794 transitions, 7533 flow [2025-04-13 20:56:28,354 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 9.205128205128204) internal successors, (359), 39 states have internal predecessors, (359), 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) [2025-04-13 20:56:28,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:56:28,354 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 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] [2025-04-13 20:56:28,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 20:56:28,559 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:28,559 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:56:28,560 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:56:28,560 INFO L85 PathProgramCache]: Analyzing trace with hash 870249706, now seen corresponding path program 4 times [2025-04-13 20:56:28,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:56:28,560 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435784830] [2025-04-13 20:56:28,560 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:56:28,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:56:28,566 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-04-13 20:56:28,581 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-04-13 20:56:28,581 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:56:28,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:56:28,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:56:28,848 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435784830] [2025-04-13 20:56:28,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435784830] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:56:28,848 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335990511] [2025-04-13 20:56:28,848 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:56:28,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:28,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:56:28,850 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) [2025-04-13 20:56:28,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 20:56:28,889 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-04-13 20:56:28,910 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-04-13 20:56:28,910 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:56:28,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:28,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-04-13 20:56:28,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:56:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:56:29,061 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:56:29,220 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:56:29,220 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-04-13 20:56:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:56:29,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335990511] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:56:29,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:56:29,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2025-04-13 20:56:29,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084748244] [2025-04-13 20:56:29,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:56:29,337 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 20:56:29,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:56:29,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 20:56:29,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2025-04-13 20:56:29,387 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2025-04-13 20:56:29,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 794 transitions, 7533 flow. Second operand has 25 states, 25 states have (on average 10.48) internal successors, (262), 25 states have internal predecessors, (262), 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) [2025-04-13 20:56:29,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:56:29,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2025-04-13 20:56:29,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:56:35,979 INFO L116 PetriNetUnfolderBase]: 18050/30245 cut-off events. [2025-04-13 20:56:35,980 INFO L117 PetriNetUnfolderBase]: For 1305649/1306433 co-relation queries the response was YES. [2025-04-13 20:56:36,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188777 conditions, 30245 events. 18050/30245 cut-off events. For 1305649/1306433 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 220575 event pairs, 1602 based on Foata normal form. 416/30192 useless extension candidates. Maximal degree in co-relation 188010. Up to 7898 conditions per place. [2025-04-13 20:56:36,302 INFO L140 encePairwiseOnDemand]: 19/35 looper letters, 545 selfloop transitions, 627 changer transitions 84/1260 dead transitions. [2025-04-13 20:56:36,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 1260 transitions, 14493 flow [2025-04-13 20:56:36,306 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-04-13 20:56:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-04-13 20:56:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 575 transitions. [2025-04-13 20:56:36,307 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2025-04-13 20:56:36,307 INFO L175 Difference]: Start difference. First operand has 443 places, 794 transitions, 7533 flow. Second operand 41 states and 575 transitions. [2025-04-13 20:56:36,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 1260 transitions, 14493 flow [2025-04-13 20:56:45,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1260 transitions, 13596 flow, removed 381 selfloop flow, removed 27 redundant places. [2025-04-13 20:56:45,457 INFO L231 Difference]: Finished difference. Result has 458 places, 941 transitions, 9994 flow [2025-04-13 20:56:45,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=9994, PETRI_PLACES=458, PETRI_TRANSITIONS=941} [2025-04-13 20:56:45,458 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 421 predicate places. [2025-04-13 20:56:45,458 INFO L485 AbstractCegarLoop]: Abstraction has has 458 places, 941 transitions, 9994 flow [2025-04-13 20:56:45,458 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.48) internal successors, (262), 25 states have internal predecessors, (262), 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) [2025-04-13 20:56:45,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:56:45,458 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2025-04-13 20:56:45,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-13 20:56:45,660 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-04-13 20:56:45,660 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:56:45,660 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:56:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash 284873162, now seen corresponding path program 5 times [2025-04-13 20:56:45,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:56:45,660 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339476871] [2025-04-13 20:56:45,660 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:56:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:56:45,665 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 3 equivalence classes. [2025-04-13 20:56:45,671 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 40 of 40 statements. [2025-04-13 20:56:45,671 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:56:45,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-13 20:56:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:56:45,724 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339476871] [2025-04-13 20:56:45,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339476871] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:56:45,724 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206519375] [2025-04-13 20:56:45,724 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:56:45,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:56:45,727 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) [2025-04-13 20:56:45,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-13 20:56:45,767 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 40 statements into 3 equivalence classes. [2025-04-13 20:56:45,786 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 40 of 40 statements. [2025-04-13 20:56:45,786 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:56:45,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:45,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 20:56:45,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:56:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-13 20:56:45,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:56:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:56:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206519375] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:56:45,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:56:45,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2025-04-13 20:56:45,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850935850] [2025-04-13 20:56:45,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:56:45,914 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-13 20:56:45,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:56:45,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-13 20:56:45,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-04-13 20:56:45,915 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-04-13 20:56:45,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 941 transitions, 9994 flow. Second operand has 10 states, 10 states have (on average 17.0) internal successors, (170), 10 states have internal predecessors, (170), 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) [2025-04-13 20:56:45,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:56:45,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-04-13 20:56:45,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:56:53,230 INFO L116 PetriNetUnfolderBase]: 17749/35050 cut-off events. [2025-04-13 20:56:53,230 INFO L117 PetriNetUnfolderBase]: For 1975210/1980012 co-relation queries the response was YES. [2025-04-13 20:56:53,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242385 conditions, 35050 events. 17749/35050 cut-off events. For 1975210/1980012 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 322859 event pairs, 5640 based on Foata normal form. 1109/34045 useless extension candidates. Maximal degree in co-relation 241937. Up to 10798 conditions per place. [2025-04-13 20:56:53,645 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 812 selfloop transitions, 470 changer transitions 0/1518 dead transitions. [2025-04-13 20:56:53,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1518 transitions, 18843 flow [2025-04-13 20:56:53,646 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:56:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:56:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2025-04-13 20:56:53,646 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7314285714285714 [2025-04-13 20:56:53,646 INFO L175 Difference]: Start difference. First operand has 458 places, 941 transitions, 9994 flow. Second operand 5 states and 128 transitions. [2025-04-13 20:56:53,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1518 transitions, 18843 flow [2025-04-13 20:57:02,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1518 transitions, 17857 flow, removed 203 selfloop flow, removed 18 redundant places. [2025-04-13 20:57:02,567 INFO L231 Difference]: Finished difference. Result has 442 places, 1278 transitions, 14428 flow [2025-04-13 20:57:02,568 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=9091, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=14428, PETRI_PLACES=442, PETRI_TRANSITIONS=1278} [2025-04-13 20:57:02,568 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 405 predicate places. [2025-04-13 20:57:02,568 INFO L485 AbstractCegarLoop]: Abstraction has has 442 places, 1278 transitions, 14428 flow [2025-04-13 20:57:02,568 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.0) internal successors, (170), 10 states have internal predecessors, (170), 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) [2025-04-13 20:57:02,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:57:02,568 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 2, 2, 2, 2, 2, 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] [2025-04-13 20:57:02,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-13 20:57:02,769 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:57:02,769 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:57:02,770 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:57:02,770 INFO L85 PathProgramCache]: Analyzing trace with hash -39045255, now seen corresponding path program 6 times [2025-04-13 20:57:02,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:57:02,770 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508439395] [2025-04-13 20:57:02,770 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:57:02,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:57:02,777 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 4 equivalence classes. [2025-04-13 20:57:02,794 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 39 of 41 statements. [2025-04-13 20:57:02,795 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:57:02,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-04-13 20:57:03,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:57:03,047 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508439395] [2025-04-13 20:57:03,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508439395] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:57:03,047 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684003705] [2025-04-13 20:57:03,047 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:57:03,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:57:03,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:57:03,049 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) [2025-04-13 20:57:03,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-13 20:57:03,095 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 41 statements into 4 equivalence classes. [2025-04-13 20:57:03,123 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 39 of 41 statements. [2025-04-13 20:57:03,123 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:57:03,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:03,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-13 20:57:03,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:57:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-04-13 20:57:03,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:57:03,472 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:57:03,473 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-04-13 20:57:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-04-13 20:57:03,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684003705] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:57:03,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:57:03,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2025-04-13 20:57:03,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168778340] [2025-04-13 20:57:03,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:57:03,646 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:57:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:57:03,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:57:03,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:57:03,668 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2025-04-13 20:57:03,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1278 transitions, 14428 flow. Second operand has 28 states, 28 states have (on average 9.107142857142858) internal successors, (255), 28 states have internal predecessors, (255), 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) [2025-04-13 20:57:03,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:57:03,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2025-04-13 20:57:03,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:57:18,486 INFO L116 PetriNetUnfolderBase]: 37810/60813 cut-off events. [2025-04-13 20:57:18,486 INFO L117 PetriNetUnfolderBase]: For 2102393/2102393 co-relation queries the response was YES. [2025-04-13 20:57:19,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377155 conditions, 60813 events. 37810/60813 cut-off events. For 2102393/2102393 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 445223 event pairs, 4428 based on Foata normal form. 472/61280 useless extension candidates. Maximal degree in co-relation 376345. Up to 15768 conditions per place. [2025-04-13 20:57:19,641 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 809 selfloop transitions, 792 changer transitions 133/1737 dead transitions. [2025-04-13 20:57:19,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1737 transitions, 22735 flow [2025-04-13 20:57:19,641 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:57:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:57:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 493 transitions. [2025-04-13 20:57:19,643 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39126984126984127 [2025-04-13 20:57:19,643 INFO L175 Difference]: Start difference. First operand has 442 places, 1278 transitions, 14428 flow. Second operand 36 states and 493 transitions. [2025-04-13 20:57:19,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1737 transitions, 22735 flow [2025-04-13 20:57:35,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1737 transitions, 22401 flow, removed 167 selfloop flow, removed 0 redundant places. [2025-04-13 20:57:35,020 INFO L231 Difference]: Finished difference. Result has 483 places, 1348 transitions, 17335 flow [2025-04-13 20:57:35,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=14200, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17335, PETRI_PLACES=483, PETRI_TRANSITIONS=1348} [2025-04-13 20:57:35,021 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 446 predicate places. [2025-04-13 20:57:35,021 INFO L485 AbstractCegarLoop]: Abstraction has has 483 places, 1348 transitions, 17335 flow [2025-04-13 20:57:35,022 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.107142857142858) internal successors, (255), 28 states have internal predecessors, (255), 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) [2025-04-13 20:57:35,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:57:35,022 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:57:35,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-13 20:57:35,222 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:57:35,223 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:57:35,223 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:57:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1343742093, now seen corresponding path program 7 times [2025-04-13 20:57:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:57:35,223 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843549109] [2025-04-13 20:57:35,223 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:57:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:57:35,229 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-04-13 20:57:35,233 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-04-13 20:57:35,233 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:57:35,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:57:35,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:57:35,385 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843549109] [2025-04-13 20:57:35,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843549109] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:57:35,385 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154487019] [2025-04-13 20:57:35,385 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:57:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:57:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:57:35,387 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) [2025-04-13 20:57:35,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-13 20:57:35,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-04-13 20:57:35,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-04-13 20:57:35,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:57:35,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:35,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 20:57:35,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:57:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:57:35,552 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:57:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:57:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154487019] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:57:35,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:57:35,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-13 20:57:35,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852581402] [2025-04-13 20:57:35,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:57:35,643 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-13 20:57:35,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:57:35,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-13 20:57:35,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2025-04-13 20:57:35,644 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-04-13 20:57:35,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 1348 transitions, 17335 flow. Second operand has 21 states, 21 states have (on average 15.142857142857142) internal successors, (318), 21 states have internal predecessors, (318), 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) [2025-04-13 20:57:35,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:57:35,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-04-13 20:57:35,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:57:37,878 INFO L116 PetriNetUnfolderBase]: 5708/11292 cut-off events. [2025-04-13 20:57:37,879 INFO L117 PetriNetUnfolderBase]: For 350467/351402 co-relation queries the response was YES. [2025-04-13 20:57:37,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76950 conditions, 11292 events. 5708/11292 cut-off events. For 350467/351402 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 87470 event pairs, 3312 based on Foata normal form. 218/10645 useless extension candidates. Maximal degree in co-relation 76833. Up to 7382 conditions per place. [2025-04-13 20:57:38,008 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 329 selfloop transitions, 4 changer transitions 56/466 dead transitions. [2025-04-13 20:57:38,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 466 transitions, 6963 flow [2025-04-13 20:57:38,008 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-13 20:57:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-13 20:57:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2025-04-13 20:57:38,009 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-04-13 20:57:38,009 INFO L175 Difference]: Start difference. First operand has 483 places, 1348 transitions, 17335 flow. Second operand 10 states and 182 transitions. [2025-04-13 20:57:38,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 466 transitions, 6963 flow [2025-04-13 20:57:39,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 466 transitions, 5646 flow, removed 142 selfloop flow, removed 84 redundant places. [2025-04-13 20:57:39,076 INFO L231 Difference]: Finished difference. Result has 250 places, 410 transitions, 4460 flow [2025-04-13 20:57:39,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4460, PETRI_PLACES=250, PETRI_TRANSITIONS=410} [2025-04-13 20:57:39,077 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 213 predicate places. [2025-04-13 20:57:39,077 INFO L485 AbstractCegarLoop]: Abstraction has has 250 places, 410 transitions, 4460 flow [2025-04-13 20:57:39,077 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 15.142857142857142) internal successors, (318), 21 states have internal predecessors, (318), 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) [2025-04-13 20:57:39,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:57:39,077 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:57:39,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-04-13 20:57:39,277 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-13 20:57:39,278 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:57:39,278 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:57:39,278 INFO L85 PathProgramCache]: Analyzing trace with hash -743546066, now seen corresponding path program 8 times [2025-04-13 20:57:39,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:57:39,278 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865629720] [2025-04-13 20:57:39,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:57:39,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:57:39,283 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-04-13 20:57:39,300 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-04-13 20:57:39,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:57:39,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:57:39,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:57:39,882 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865629720] [2025-04-13 20:57:39,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865629720] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:57:39,882 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708289475] [2025-04-13 20:57:39,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:57:39,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:57:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:57:39,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:57:39,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-13 20:57:39,924 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-04-13 20:57:39,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-04-13 20:57:39,943 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:57:39,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:39,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-04-13 20:57:39,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:57:40,010 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-04-13 20:57:40,436 INFO L325 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2025-04-13 20:57:40,437 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 18 [2025-04-13 20:57:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:57:40,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:57:41,580 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 152 [2025-04-13 20:57:41,631 INFO L325 Elim1Store]: treesize reduction 46, result has 55.3 percent of original size [2025-04-13 20:57:41,631 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 541 treesize of output 418 [2025-04-13 20:57:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:57:42,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708289475] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:57:42,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:57:42,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2025-04-13 20:57:42,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698912769] [2025-04-13 20:57:42,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:57:42,589 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-04-13 20:57:42,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:57:42,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-04-13 20:57:42,591 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2025-04-13 20:57:42,656 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2025-04-13 20:57:42,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 410 transitions, 4460 flow. Second operand has 51 states, 51 states have (on average 8.27450980392157) internal successors, (422), 51 states have internal predecessors, (422), 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) [2025-04-13 20:57:42,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:57:42,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2025-04-13 20:57:42,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:58:09,889 INFO L116 PetriNetUnfolderBase]: 54278/87404 cut-off events. [2025-04-13 20:58:09,889 INFO L117 PetriNetUnfolderBase]: For 702774/702774 co-relation queries the response was YES. [2025-04-13 20:58:10,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433479 conditions, 87404 events. 54278/87404 cut-off events. For 702774/702774 co-relation queries the response was YES. Maximal size of possible extension queue 1839. Compared 684528 event pairs, 3835 based on Foata normal form. 3848/91250 useless extension candidates. Maximal degree in co-relation 433410. Up to 13277 conditions per place. [2025-04-13 20:58:11,088 INFO L140 encePairwiseOnDemand]: 20/35 looper letters, 1569 selfloop transitions, 1402 changer transitions 1201/4175 dead transitions. [2025-04-13 20:58:11,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 4175 transitions, 48155 flow [2025-04-13 20:58:11,089 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2025-04-13 20:58:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2025-04-13 20:58:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 3151 transitions. [2025-04-13 20:58:11,093 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4167989417989418 [2025-04-13 20:58:11,093 INFO L175 Difference]: Start difference. First operand has 250 places, 410 transitions, 4460 flow. Second operand 216 states and 3151 transitions. [2025-04-13 20:58:11,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 4175 transitions, 48155 flow [2025-04-13 20:58:13,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 4175 transitions, 46508 flow, removed 811 selfloop flow, removed 17 redundant places. [2025-04-13 20:58:13,192 INFO L231 Difference]: Finished difference. Result has 516 places, 1669 transitions, 24873 flow [2025-04-13 20:58:13,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4399, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=216, PETRI_FLOW=24873, PETRI_PLACES=516, PETRI_TRANSITIONS=1669} [2025-04-13 20:58:13,193 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 479 predicate places. [2025-04-13 20:58:13,193 INFO L485 AbstractCegarLoop]: Abstraction has has 516 places, 1669 transitions, 24873 flow [2025-04-13 20:58:13,193 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 8.27450980392157) internal successors, (422), 51 states have internal predecessors, (422), 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) [2025-04-13 20:58:13,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:58:13,193 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:58:13,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-13 20:58:13,398 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-13 20:58:13,398 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:58:13,399 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:58:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1896959026, now seen corresponding path program 9 times [2025-04-13 20:58:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:58:13,399 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510085734] [2025-04-13 20:58:13,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:58:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:58:13,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 3 equivalence classes. [2025-04-13 20:58:13,416 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 45 of 45 statements. [2025-04-13 20:58:13,416 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 20:58:13,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:58:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:58:13,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:58:13,984 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510085734] [2025-04-13 20:58:13,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510085734] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:58:13,984 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115158862] [2025-04-13 20:58:13,984 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:58:13,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:58:13,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:58:13,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:58:13,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-13 20:58:14,026 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 45 statements into 3 equivalence classes. [2025-04-13 20:58:14,047 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 45 of 45 statements. [2025-04-13 20:58:14,047 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 20:58:14,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:58:14,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-04-13 20:58:14,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:58:14,123 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-04-13 20:58:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:58:14,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:58:15,990 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 151 [2025-04-13 20:58:16,047 INFO L325 Elim1Store]: treesize reduction 42, result has 61.5 percent of original size [2025-04-13 20:58:16,047 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 544 treesize of output 432 [2025-04-13 20:58:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:58:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115158862] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:58:20,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:58:20,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 48 [2025-04-13 20:58:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643438968] [2025-04-13 20:58:20,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:58:20,940 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-04-13 20:58:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:58:20,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-04-13 20:58:20,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2014, Unknown=0, NotChecked=0, Total=2352 [2025-04-13 20:58:21,104 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2025-04-13 20:58:21,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1669 transitions, 24873 flow. Second operand has 49 states, 49 states have (on average 9.183673469387756) internal successors, (450), 49 states have internal predecessors, (450), 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) [2025-04-13 20:58:21,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:58:21,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2025-04-13 20:58:21,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:59:34,755 INFO L116 PetriNetUnfolderBase]: 93099/159549 cut-off events. [2025-04-13 20:59:34,756 INFO L117 PetriNetUnfolderBase]: For 13067593/13068769 co-relation queries the response was YES. [2025-04-13 20:59:39,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166097 conditions, 159549 events. 93099/159549 cut-off events. For 13067593/13068769 co-relation queries the response was YES. Maximal size of possible extension queue 2743. Compared 1446139 event pairs, 8927 based on Foata normal form. 6472/165721 useless extension candidates. Maximal degree in co-relation 1165943. Up to 24637 conditions per place. [2025-04-13 20:59:40,079 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 1648 selfloop transitions, 3354 changer transitions 1719/6744 dead transitions. [2025-04-13 20:59:40,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 663 places, 6744 transitions, 114582 flow [2025-04-13 20:59:40,080 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2025-04-13 20:59:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2025-04-13 20:59:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 2311 transitions. [2025-04-13 20:59:40,083 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42326007326007326 [2025-04-13 20:59:40,083 INFO L175 Difference]: Start difference. First operand has 516 places, 1669 transitions, 24873 flow. Second operand 156 states and 2311 transitions. [2025-04-13 20:59:40,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 663 places, 6744 transitions, 114582 flow Received shutdown request... [2025-04-13 21:08:12,752 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 21:08:12,753 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 21:08:13,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-13 21:08:13,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 [2025-04-13 21:08:14,110 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-13 21:08:14,111 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-04-13 21:08:14,111 WARN L610 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2025-04-13 21:08:14,113 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-13 21:08:14,113 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-13 21:08:14,113 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-04-13 21:08:14,113 INFO L422 BasicCegarLoop]: Path program histogram: [9, 5, 1, 1, 1, 1] [2025-04-13 21:08:14,129 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 21:08:14,129 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 21:08:14,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 09:08:14 BasicIcfg [2025-04-13 21:08:14,134 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 21:08:14,134 INFO L158 Benchmark]: Toolchain (without parser) took 744413.88ms. Allocated memory was 142.6MB in the beginning and 6.9GB in the end (delta: 6.8GB). Free memory was 99.2MB in the beginning and 2.9GB in the end (delta: -2.8GB). Peak memory consumption was 6.8GB. Max. memory is 8.0GB. [2025-04-13 21:08:14,135 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 159.4MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 21:08:14,135 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.34ms. Allocated memory is still 142.6MB. Free memory was 99.2MB in the beginning and 84.2MB in the end (delta: 15.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-13 21:08:14,135 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.27ms. Allocated memory is still 142.6MB. Free memory was 84.2MB in the beginning and 81.8MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 21:08:14,135 INFO L158 Benchmark]: Boogie Preprocessor took 47.35ms. Allocated memory is still 142.6MB. Free memory was 81.8MB in the beginning and 80.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 21:08:14,136 INFO L158 Benchmark]: RCFGBuilder took 495.25ms. Allocated memory is still 142.6MB. Free memory was 80.0MB in the beginning and 33.9MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. [2025-04-13 21:08:14,136 INFO L158 Benchmark]: TraceAbstraction took 743593.04ms. Allocated memory was 142.6MB in the beginning and 6.9GB in the end (delta: 6.8GB). Free memory was 33.4MB in the beginning and 2.9GB in the end (delta: -2.9GB). Peak memory consumption was 6.7GB. Max. memory is 8.0GB. [2025-04-13 21:08:14,138 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 159.4MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.34ms. Allocated memory is still 142.6MB. Free memory was 99.2MB in the beginning and 84.2MB in the end (delta: 15.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.27ms. Allocated memory is still 142.6MB. Free memory was 84.2MB in the beginning and 81.8MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 47.35ms. Allocated memory is still 142.6MB. Free memory was 81.8MB in the beginning and 80.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 495.25ms. Allocated memory is still 142.6MB. Free memory was 80.0MB in the beginning and 33.9MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. * TraceAbstraction took 743593.04ms. Allocated memory was 142.6MB in the beginning and 6.9GB in the end (delta: 6.8GB). Free memory was 33.4MB in the beginning and 2.9GB in the end (delta: -2.9GB). Peak memory consumption was 6.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 117]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 111]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 59 edges, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 743.5s, OverallIterations: 18, TraceHistogramMax: 6, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 721.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9031 SdHoareTripleChecker+Valid, 13.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8990 mSDsluCounter, 1727 SdHoareTripleChecker+Invalid, 12.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1688 mSDsCounter, 1294 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24102 IncrementalHoareTripleChecker+Invalid, 25396 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1294 mSolverCounterUnsat, 39 mSDtfsCounter, 24102 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1617 GetRequests, 611 SyntacticMatches, 2 SemanticMatches, 1004 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73926 ImplicationChecksByTransitivity, 44.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24873occurred in iteration=17, InterpolantAutomatonStates: 654, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 19.1s InterpolantComputationTime, 1012 NumberOfCodeBlocks, 1007 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 1366 ConstructedInterpolants, 54 QuantifiedInterpolants, 23655 SizeOfPredicates, 94 NumberOfNonLiveVariables, 2260 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 38 InterpolantComputations, 8 PerfectInterpolantSequences, 167/355 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown