/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-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:53:38,502 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:53:38,546 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 20:53:38,550 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:53:38,550 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:53:38,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:53:38,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:53:38,573 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:53:38,573 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:53:38,574 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:53:38,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:53:38,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:53:38,574 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:53:38,574 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:53:38,574 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:53:38,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:53:38,575 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:53:38,575 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:53:38,576 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:53:38,576 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:53:38,576 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:53:38,577 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:53:38,577 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:53:38,577 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:53:38,577 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 20:53:38,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:53:38,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:53:38,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:53:38,771 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:53:38,773 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:53:38,773 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2025-04-13 20:53:40,020 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a00c44f01/454f57aebaab461e865a40d7ec28ea87/FLAGd94bb02e0 [2025-04-13 20:53:40,191 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:53:40,191 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2025-04-13 20:53:40,196 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a00c44f01/454f57aebaab461e865a40d7ec28ea87/FLAGd94bb02e0 [2025-04-13 20:53:41,021 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a00c44f01/454f57aebaab461e865a40d7ec28ea87 [2025-04-13 20:53:41,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:53:41,024 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:53:41,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:53:41,025 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:53:41,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:53:41,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b01e2f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41, skipping insertion in model container [2025-04-13 20:53:41,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,041 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:53:41,200 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-queue-add-2.wvr.c[2722,2735] [2025-04-13 20:53:41,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:53:41,222 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:53:41,253 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-queue-add-2.wvr.c[2722,2735] [2025-04-13 20:53:41,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:53:41,273 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:53:41,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41 WrapperNode [2025-04-13 20:53:41,273 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:53:41,274 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:53:41,274 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:53:41,274 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:53:41,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,283 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,300 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 140 [2025-04-13 20:53:41,303 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:53:41,303 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:53:41,303 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:53:41,303 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:53:41,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,311 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,325 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 20:53:41,325 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,325 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,333 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,334 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,336 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,337 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,339 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:53:41,341 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:53:41,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:53:41,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:53:41,342 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (1/1) ... [2025-04-13 20:53:41,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:53:41,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:41,363 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 20:53:41,365 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 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:53:41,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:53:41,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 20:53:41,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 20:53:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:53:41,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:53:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 20:53:41,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 20:53:41,381 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 20:53:41,443 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:53:41,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:53:41,636 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:53:41,637 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:53:41,637 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:53:41,802 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 20:53:41,805 INFO L313 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-13 20:53:41,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:53:41 BoogieIcfgContainer [2025-04-13 20:53:41,805 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:53:41,808 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:53:41,808 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:53:41,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:53:41,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:53:41" (1/3) ... [2025-04-13 20:53:41,811 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8afba17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:53:41, skipping insertion in model container [2025-04-13 20:53:41,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:53:41" (2/3) ... [2025-04-13 20:53:41,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8afba17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:53:41, skipping insertion in model container [2025-04-13 20:53:41,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:53:41" (3/3) ... [2025-04-13 20:53:41,813 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2025-04-13 20:53:41,823 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:53:41,824 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-2.wvr.c that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 20:53:41,824 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:53:41,856 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 20:53:41,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 64 flow [2025-04-13 20:53:41,921 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 20:53:41,922 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:53:41,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 5/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2025-04-13 20:53:41,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 64 flow [2025-04-13 20:53:41,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 22 transitions, 56 flow [2025-04-13 20:53:41,931 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:53:41,938 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;@279bec6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:53:41,939 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 20:53:41,946 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:53:41,946 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 20:53:41,946 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:53:41,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:41,948 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:41,948 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:41,952 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:41,954 INFO L85 PathProgramCache]: Analyzing trace with hash -23001461, now seen corresponding path program 1 times [2025-04-13 20:53:41,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:41,959 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18116275] [2025-04-13 20:53:41,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:41,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:42,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 20:53:42,026 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:53:42,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:42,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:42,095 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 20:53:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:42,095 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18116275] [2025-04-13 20:53:42,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18116275] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:53:42,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:53:42,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 20:53:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685806837] [2025-04-13 20:53:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:53:42,102 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 20:53:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:42,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 20:53:42,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 20:53:42,121 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:42,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20:53:42,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:42,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:42,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:42,185 INFO L116 PetriNetUnfolderBase]: 100/168 cut-off events. [2025-04-13 20:53:42,185 INFO L117 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-04-13 20:53:42,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 168 events. 100/168 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 418 event pairs, 66 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 320. Up to 169 conditions per place. [2025-04-13 20:53:42,187 INFO L140 encePairwiseOnDemand]: 24/25 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2025-04-13 20:53:42,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 96 flow [2025-04-13 20:53:42,188 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 20:53:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 20:53:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 26 transitions. [2025-04-13 20:53:42,196 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-04-13 20:53:42,197 INFO L175 Difference]: Start difference. First operand has 24 places, 22 transitions, 56 flow. Second operand 2 states and 26 transitions. [2025-04-13 20:53:42,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 96 flow [2025-04-13 20:53:42,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 20:53:42,201 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 46 flow [2025-04-13 20:53:42,202 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2025-04-13 20:53:42,204 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2025-04-13 20:53:42,204 INFO L485 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 46 flow [2025-04-13 20:53:42,204 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 20:53:42,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:42,205 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:42,205 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:53:42,205 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:42,205 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 587082503, now seen corresponding path program 1 times [2025-04-13 20:53:42,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:42,205 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136884303] [2025-04-13 20:53:42,205 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:42,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:42,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-13 20:53:42,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 20:53:42,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:42,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:42,437 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 20:53:42,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:42,437 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136884303] [2025-04-13 20:53:42,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136884303] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:53:42,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:53:42,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:53:42,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066996745] [2025-04-13 20:53:42,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:53:42,438 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:53:42,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:42,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:53:42,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:53:42,438 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:42,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 20:53:42,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:42,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:42,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:42,537 INFO L116 PetriNetUnfolderBase]: 113/201 cut-off events. [2025-04-13 20:53:42,537 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:53:42,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 201 events. 113/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 563 event pairs, 79 based on Foata normal form. 18/178 useless extension candidates. Maximal degree in co-relation 413. Up to 169 conditions per place. [2025-04-13 20:53:42,539 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 20 selfloop transitions, 2 changer transitions 8/30 dead transitions. [2025-04-13 20:53:42,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 126 flow [2025-04-13 20:53:42,540 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:53:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:53:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2025-04-13 20:53:42,540 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41 [2025-04-13 20:53:42,540 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 46 flow. Second operand 4 states and 41 transitions. [2025-04-13 20:53:42,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 126 flow [2025-04-13 20:53:42,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 20:53:42,542 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 64 flow [2025-04-13 20:53:42,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-04-13 20:53:42,542 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2025-04-13 20:53:42,542 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 64 flow [2025-04-13 20:53:42,543 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 20:53:42,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:42,543 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:42,543 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:53:42,543 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:42,543 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash 860110210, now seen corresponding path program 1 times [2025-04-13 20:53:42,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:42,544 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179146306] [2025-04-13 20:53:42,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:42,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:42,553 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:53:42,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:53:42,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:42,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:42,768 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 20:53:42,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:42,768 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179146306] [2025-04-13 20:53:42,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179146306] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:53:42,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:53:42,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:53:42,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055019685] [2025-04-13 20:53:42,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:53:42,769 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:53:42,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:42,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:53:42,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:53:42,769 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:42,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 64 flow. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:42,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:42,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:42,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:42,909 INFO L116 PetriNetUnfolderBase]: 199/344 cut-off events. [2025-04-13 20:53:42,909 INFO L117 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-04-13 20:53:42,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 344 events. 199/344 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1182 event pairs, 66 based on Foata normal form. 1/279 useless extension candidates. Maximal degree in co-relation 778. Up to 143 conditions per place. [2025-04-13 20:53:42,911 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 40 selfloop transitions, 5 changer transitions 2/47 dead transitions. [2025-04-13 20:53:42,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 47 transitions, 223 flow [2025-04-13 20:53:42,913 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:53:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:53:42,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2025-04-13 20:53:42,915 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.456 [2025-04-13 20:53:42,915 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 64 flow. Second operand 5 states and 57 transitions. [2025-04-13 20:53:42,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 47 transitions, 223 flow [2025-04-13 20:53:42,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 219 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-13 20:53:42,916 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 87 flow [2025-04-13 20:53:42,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2025-04-13 20:53:42,916 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2025-04-13 20:53:42,916 INFO L485 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 87 flow [2025-04-13 20:53:42,916 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:42,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:42,917 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:42,917 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:53:42,917 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:42,917 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2027590882, now seen corresponding path program 1 times [2025-04-13 20:53:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:42,917 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525918991] [2025-04-13 20:53:42,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:42,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:53:42,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:53:42,942 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:42,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:43,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:43,086 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525918991] [2025-04-13 20:53:43,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525918991] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:43,086 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809839018] [2025-04-13 20:53:43,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:43,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:43,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:43,091 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 20:53:43,092 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 20:53:43,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:53:43,154 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:53:43,154 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:43,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:43,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-13 20:53:43,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:43,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:43,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809839018] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:43,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:43,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-04-13 20:53:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308847786] [2025-04-13 20:53:43,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:43,334 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-13 20:53:43,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:43,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-13 20:53:43,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-04-13 20:53:43,334 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:43,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 87 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 20:53:43,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:43,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:43,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:43,466 INFO L116 PetriNetUnfolderBase]: 347/616 cut-off events. [2025-04-13 20:53:43,466 INFO L117 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2025-04-13 20:53:43,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 616 events. 347/616 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2516 event pairs, 182 based on Foata normal form. 36/620 useless extension candidates. Maximal degree in co-relation 1527. Up to 344 conditions per place. [2025-04-13 20:53:43,469 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 41 selfloop transitions, 5 changer transitions 9/55 dead transitions. [2025-04-13 20:53:43,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 297 flow [2025-04-13 20:53:43,472 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:53:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:53:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2025-04-13 20:53:43,473 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42 [2025-04-13 20:53:43,473 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 87 flow. Second operand 6 states and 63 transitions. [2025-04-13 20:53:43,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 297 flow [2025-04-13 20:53:43,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 55 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:53:43,475 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 129 flow [2025-04-13 20:53:43,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2025-04-13 20:53:43,475 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2025-04-13 20:53:43,475 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 129 flow [2025-04-13 20:53:43,476 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 20:53:43,476 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:43,476 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:43,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 20:53:43,676 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:43,677 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:43,677 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1873383726, now seen corresponding path program 1 times [2025-04-13 20:53:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:43,677 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914061484] [2025-04-13 20:53:43,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:43,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:43,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:53:43,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:53:43,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:43,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:43,737 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 20:53:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:43,737 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914061484] [2025-04-13 20:53:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914061484] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:53:43,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:53:43,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:53:43,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290393332] [2025-04-13 20:53:43,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:53:43,737 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:53:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:43,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:53:43,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:53:43,738 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:43,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:43,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:43,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:43,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:43,831 INFO L116 PetriNetUnfolderBase]: 380/691 cut-off events. [2025-04-13 20:53:43,831 INFO L117 PetriNetUnfolderBase]: For 561/561 co-relation queries the response was YES. [2025-04-13 20:53:43,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 691 events. 380/691 cut-off events. For 561/561 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2872 event pairs, 92 based on Foata normal form. 22/671 useless extension candidates. Maximal degree in co-relation 1959. Up to 246 conditions per place. [2025-04-13 20:53:43,836 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 48 selfloop transitions, 6 changer transitions 4/58 dead transitions. [2025-04-13 20:53:43,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 351 flow [2025-04-13 20:53:43,836 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:53:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:53:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-04-13 20:53:43,837 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.59 [2025-04-13 20:53:43,837 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 129 flow. Second operand 4 states and 59 transitions. [2025-04-13 20:53:43,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 351 flow [2025-04-13 20:53:43,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 58 transitions, 304 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-04-13 20:53:43,839 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 125 flow [2025-04-13 20:53:43,839 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2025-04-13 20:53:43,840 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2025-04-13 20:53:43,840 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 125 flow [2025-04-13 20:53:43,840 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:43,840 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:43,840 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:43,840 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 20:53:43,840 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:43,842 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:43,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1479542673, now seen corresponding path program 2 times [2025-04-13 20:53:43,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:43,842 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432723140] [2025-04-13 20:53:43,842 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:53:43,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:43,861 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-13 20:53:43,873 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 19 statements. [2025-04-13 20:53:43,877 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:53:43,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:53:43,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:43,957 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432723140] [2025-04-13 20:53:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432723140] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:53:43,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:53:43,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:53:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902290879] [2025-04-13 20:53:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:53:43,957 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:53:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:43,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:53:43,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-04-13 20:53:43,958 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:43,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 125 flow. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:43,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:43,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:43,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:44,067 INFO L116 PetriNetUnfolderBase]: 262/461 cut-off events. [2025-04-13 20:53:44,067 INFO L117 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2025-04-13 20:53:44,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 461 events. 262/461 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1639 event pairs, 32 based on Foata normal form. 28/452 useless extension candidates. Maximal degree in co-relation 1328. Up to 169 conditions per place. [2025-04-13 20:53:44,070 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 47 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2025-04-13 20:53:44,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 358 flow [2025-04-13 20:53:44,070 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:53:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:53:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2025-04-13 20:53:44,072 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36 [2025-04-13 20:53:44,073 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 125 flow. Second operand 6 states and 54 transitions. [2025-04-13 20:53:44,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 358 flow [2025-04-13 20:53:44,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 330 flow, removed 14 selfloop flow, removed 1 redundant places. [2025-04-13 20:53:44,075 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 160 flow [2025-04-13 20:53:44,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2025-04-13 20:53:44,075 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 16 predicate places. [2025-04-13 20:53:44,075 INFO L485 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 160 flow [2025-04-13 20:53:44,075 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:44,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:44,077 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:44,077 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 20:53:44,077 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:44,077 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash -766306823, now seen corresponding path program 1 times [2025-04-13 20:53:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:44,078 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637844345] [2025-04-13 20:53:44,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:44,085 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:53:44,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:53:44,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:44,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:44,691 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 20:53:44,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:44,691 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637844345] [2025-04-13 20:53:44,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637844345] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:44,691 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344813768] [2025-04-13 20:53:44,691 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:44,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:44,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:44,694 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 20:53:44,695 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 20:53:44,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:53:44,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:53:44,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:44,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:44,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-04-13 20:53:44,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:45,186 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 20:53:45,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:45,367 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:53:45,368 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-04-13 20:53:45,650 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 20:53:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344813768] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:45,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:45,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 31 [2025-04-13 20:53:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993386253] [2025-04-13 20:53:45,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:45,651 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-04-13 20:53:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:45,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-04-13 20:53:45,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2025-04-13 20:53:45,652 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:45,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 160 flow. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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 20:53:45,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:45,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:45,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:47,504 INFO L116 PetriNetUnfolderBase]: 520/940 cut-off events. [2025-04-13 20:53:47,506 INFO L117 PetriNetUnfolderBase]: For 1094/1094 co-relation queries the response was YES. [2025-04-13 20:53:47,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 940 events. 520/940 cut-off events. For 1094/1094 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4389 event pairs, 31 based on Foata normal form. 4/886 useless extension candidates. Maximal degree in co-relation 2819. Up to 309 conditions per place. [2025-04-13 20:53:47,512 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 141 selfloop transitions, 62 changer transitions 23/226 dead transitions. [2025-04-13 20:53:47,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 226 transitions, 1311 flow [2025-04-13 20:53:47,513 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-04-13 20:53:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-04-13 20:53:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 299 transitions. [2025-04-13 20:53:47,515 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2917073170731707 [2025-04-13 20:53:47,515 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 160 flow. Second operand 41 states and 299 transitions. [2025-04-13 20:53:47,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 226 transitions, 1311 flow [2025-04-13 20:53:47,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 226 transitions, 1270 flow, removed 10 selfloop flow, removed 2 redundant places. [2025-04-13 20:53:47,522 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 656 flow [2025-04-13 20:53:47,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=656, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2025-04-13 20:53:47,523 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 70 predicate places. [2025-04-13 20:53:47,523 INFO L485 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 656 flow [2025-04-13 20:53:47,523 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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 20:53:47,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:47,523 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:47,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-13 20:53:47,727 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,SelfDestructingSolverStorable6 [2025-04-13 20:53:47,727 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:47,727 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:47,728 INFO L85 PathProgramCache]: Analyzing trace with hash 117521541, now seen corresponding path program 2 times [2025-04-13 20:53:47,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:47,728 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233400016] [2025-04-13 20:53:47,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:53:47,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:47,733 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:53:47,745 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:53:47,745 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:53:47,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:48,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:48,178 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233400016] [2025-04-13 20:53:48,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233400016] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:48,178 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041300921] [2025-04-13 20:53:48,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:53:48,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:48,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:48,181 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 20:53:48,182 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 20:53:48,219 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:53:48,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:53:48,234 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:53:48,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:48,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-13 20:53:48,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:48,381 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 12 treesize of output 3 [2025-04-13 20:53:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:48,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:48,615 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:53:48,616 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-04-13 20:53:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:48,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041300921] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:48,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:48,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 31 [2025-04-13 20:53:48,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989691262] [2025-04-13 20:53:48,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:48,821 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-04-13 20:53:48,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:48,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-04-13 20:53:48,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2025-04-13 20:53:48,822 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:48,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 656 flow. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 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 20:53:48,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:48,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:48,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:50,636 INFO L116 PetriNetUnfolderBase]: 679/1250 cut-off events. [2025-04-13 20:53:50,637 INFO L117 PetriNetUnfolderBase]: For 3025/3025 co-relation queries the response was YES. [2025-04-13 20:53:50,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4814 conditions, 1250 events. 679/1250 cut-off events. For 3025/3025 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6350 event pairs, 70 based on Foata normal form. 8/1246 useless extension candidates. Maximal degree in co-relation 4785. Up to 462 conditions per place. [2025-04-13 20:53:50,645 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 128 selfloop transitions, 98 changer transitions 45/271 dead transitions. [2025-04-13 20:53:50,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 271 transitions, 2125 flow [2025-04-13 20:53:50,645 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-04-13 20:53:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2025-04-13 20:53:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 334 transitions. [2025-04-13 20:53:50,647 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2672 [2025-04-13 20:53:50,647 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 656 flow. Second operand 50 states and 334 transitions. [2025-04-13 20:53:50,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 271 transitions, 2125 flow [2025-04-13 20:53:50,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 271 transitions, 2048 flow, removed 33 selfloop flow, removed 7 redundant places. [2025-04-13 20:53:50,664 INFO L231 Difference]: Finished difference. Result has 148 places, 135 transitions, 1286 flow [2025-04-13 20:53:50,664 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1286, PETRI_PLACES=148, PETRI_TRANSITIONS=135} [2025-04-13 20:53:50,666 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 124 predicate places. [2025-04-13 20:53:50,666 INFO L485 AbstractCegarLoop]: Abstraction has has 148 places, 135 transitions, 1286 flow [2025-04-13 20:53:50,666 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 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 20:53:50,666 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:50,666 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:50,672 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 20:53:50,866 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:50,867 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:50,867 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:50,867 INFO L85 PathProgramCache]: Analyzing trace with hash -25617249, now seen corresponding path program 3 times [2025-04-13 20:53:50,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:50,867 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361690651] [2025-04-13 20:53:50,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:53:50,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:50,872 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:53:50,885 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:53:50,885 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:53:50,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:51,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:51,259 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361690651] [2025-04-13 20:53:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361690651] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:51,259 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997440801] [2025-04-13 20:53:51,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:53:51,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:51,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:51,262 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 20:53:51,263 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 20:53:51,299 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:53:51,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:53:51,313 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:53:51,313 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:51,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-13 20:53:51,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:51,487 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:53:51,487 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2025-04-13 20:53:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:51,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:51,780 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:53:51,781 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-04-13 20:53:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:51,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997440801] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:51,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:51,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 31 [2025-04-13 20:53:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200329293] [2025-04-13 20:53:51,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:51,996 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-04-13 20:53:51,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:51,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-04-13 20:53:51,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2025-04-13 20:53:51,997 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:51,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 135 transitions, 1286 flow. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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 20:53:51,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:51,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:51,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:53,446 INFO L116 PetriNetUnfolderBase]: 743/1359 cut-off events. [2025-04-13 20:53:53,447 INFO L117 PetriNetUnfolderBase]: For 5267/5267 co-relation queries the response was YES. [2025-04-13 20:53:53,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6007 conditions, 1359 events. 743/1359 cut-off events. For 5267/5267 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7078 event pairs, 52 based on Foata normal form. 3/1356 useless extension candidates. Maximal degree in co-relation 5965. Up to 481 conditions per place. [2025-04-13 20:53:53,457 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 127 selfloop transitions, 106 changer transitions 32/265 dead transitions. [2025-04-13 20:53:53,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 265 transitions, 2466 flow [2025-04-13 20:53:53,458 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-04-13 20:53:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-04-13 20:53:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 257 transitions. [2025-04-13 20:53:53,460 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27783783783783783 [2025-04-13 20:53:53,460 INFO L175 Difference]: Start difference. First operand has 148 places, 135 transitions, 1286 flow. Second operand 37 states and 257 transitions. [2025-04-13 20:53:53,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 265 transitions, 2466 flow [2025-04-13 20:53:53,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 265 transitions, 2103 flow, removed 130 selfloop flow, removed 26 redundant places. [2025-04-13 20:53:53,485 INFO L231 Difference]: Finished difference. Result has 161 places, 158 transitions, 1580 flow [2025-04-13 20:53:53,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1580, PETRI_PLACES=161, PETRI_TRANSITIONS=158} [2025-04-13 20:53:53,486 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 137 predicate places. [2025-04-13 20:53:53,486 INFO L485 AbstractCegarLoop]: Abstraction has has 161 places, 158 transitions, 1580 flow [2025-04-13 20:53:53,486 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 33 states have internal predecessors, (127), 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 20:53:53,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:53,486 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:53,496 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 20:53:53,691 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:53,691 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:53,691 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:53,691 INFO L85 PathProgramCache]: Analyzing trace with hash 689120497, now seen corresponding path program 4 times [2025-04-13 20:53:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:53,692 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161940033] [2025-04-13 20:53:53,692 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:53:53,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:53,696 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:53:53,710 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:53:53,710 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:53:53,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:54,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:54,079 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161940033] [2025-04-13 20:53:54,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161940033] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:54,079 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342922191] [2025-04-13 20:53:54,080 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:53:54,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:54,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:54,081 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 20:53:54,082 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 20:53:54,113 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:53:54,127 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:53:54,127 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:53:54,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:54,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:53:54,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:54,258 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 11 treesize of output 3 [2025-04-13 20:53:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:54,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:54,439 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:53:54,440 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-04-13 20:53:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:54,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342922191] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:54,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:54,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 30 [2025-04-13 20:53:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136166281] [2025-04-13 20:53:54,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:54,637 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-04-13 20:53:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:54,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-04-13 20:53:54,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2025-04-13 20:53:54,638 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:54,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 158 transitions, 1580 flow. Second operand has 32 states, 32 states have (on average 3.90625) internal successors, (125), 32 states have internal predecessors, (125), 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 20:53:54,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:54,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:54,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:55,769 INFO L116 PetriNetUnfolderBase]: 754/1383 cut-off events. [2025-04-13 20:53:55,769 INFO L117 PetriNetUnfolderBase]: For 6770/6770 co-relation queries the response was YES. [2025-04-13 20:53:55,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6414 conditions, 1383 events. 754/1383 cut-off events. For 6770/6770 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7265 event pairs, 57 based on Foata normal form. 3/1384 useless extension candidates. Maximal degree in co-relation 6367. Up to 564 conditions per place. [2025-04-13 20:53:55,778 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 150 selfloop transitions, 90 changer transitions 29/269 dead transitions. [2025-04-13 20:53:55,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 269 transitions, 2601 flow [2025-04-13 20:53:55,779 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-13 20:53:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-13 20:53:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 242 transitions. [2025-04-13 20:53:55,780 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2765714285714286 [2025-04-13 20:53:55,780 INFO L175 Difference]: Start difference. First operand has 161 places, 158 transitions, 1580 flow. Second operand 35 states and 242 transitions. [2025-04-13 20:53:55,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 269 transitions, 2601 flow [2025-04-13 20:53:55,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 269 transitions, 2506 flow, removed 26 selfloop flow, removed 18 redundant places. [2025-04-13 20:53:55,816 INFO L231 Difference]: Finished difference. Result has 177 places, 162 transitions, 1785 flow [2025-04-13 20:53:55,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1785, PETRI_PLACES=177, PETRI_TRANSITIONS=162} [2025-04-13 20:53:55,817 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 153 predicate places. [2025-04-13 20:53:55,817 INFO L485 AbstractCegarLoop]: Abstraction has has 177 places, 162 transitions, 1785 flow [2025-04-13 20:53:55,817 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.90625) internal successors, (125), 32 states have internal predecessors, (125), 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 20:53:55,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:55,817 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:55,823 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 20:53:56,017 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,SelfDestructingSolverStorable9 [2025-04-13 20:53:56,018 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:56,018 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:56,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2102109590, now seen corresponding path program 5 times [2025-04-13 20:53:56,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:56,018 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029279817] [2025-04-13 20:53:56,018 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:53:56,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:56,024 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:53:56,045 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:53:56,045 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:53:56,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:56,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:56,600 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029279817] [2025-04-13 20:53:56,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029279817] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:56,601 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122475111] [2025-04-13 20:53:56,601 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:53:56,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:56,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:56,602 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 20:53:56,604 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 20:53:56,639 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:53:56,654 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:53:56,654 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:53:56,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:56,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-04-13 20:53:56,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:53:56,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:56,861 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:53:56,862 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-04-13 20:53:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:53:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122475111] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:56,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:56,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2025-04-13 20:53:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359702566] [2025-04-13 20:53:56,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:56,901 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-13 20:53:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:56,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-13 20:53:56,902 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2025-04-13 20:53:56,902 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:56,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 162 transitions, 1785 flow. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 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 20:53:56,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:56,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:56,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:57,376 INFO L116 PetriNetUnfolderBase]: 759/1377 cut-off events. [2025-04-13 20:53:57,376 INFO L117 PetriNetUnfolderBase]: For 8808/8808 co-relation queries the response was YES. [2025-04-13 20:53:57,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7045 conditions, 1377 events. 759/1377 cut-off events. For 8808/8808 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7007 event pairs, 74 based on Foata normal form. 1/1376 useless extension candidates. Maximal degree in co-relation 6992. Up to 679 conditions per place. [2025-04-13 20:53:57,385 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 133 selfloop transitions, 66 changer transitions 11/210 dead transitions. [2025-04-13 20:53:57,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 210 transitions, 2518 flow [2025-04-13 20:53:57,386 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-13 20:53:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-13 20:53:57,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 104 transitions. [2025-04-13 20:53:57,386 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29714285714285715 [2025-04-13 20:53:57,387 INFO L175 Difference]: Start difference. First operand has 177 places, 162 transitions, 1785 flow. Second operand 14 states and 104 transitions. [2025-04-13 20:53:57,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 210 transitions, 2518 flow [2025-04-13 20:53:57,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 210 transitions, 2356 flow, removed 48 selfloop flow, removed 26 redundant places. [2025-04-13 20:53:57,422 INFO L231 Difference]: Finished difference. Result has 159 places, 163 transitions, 1912 flow [2025-04-13 20:53:57,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1912, PETRI_PLACES=159, PETRI_TRANSITIONS=163} [2025-04-13 20:53:57,423 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 135 predicate places. [2025-04-13 20:53:57,423 INFO L485 AbstractCegarLoop]: Abstraction has has 159 places, 163 transitions, 1912 flow [2025-04-13 20:53:57,423 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 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 20:53:57,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:57,423 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] [2025-04-13 20:53:57,430 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 20:53:57,623 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:57,624 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:57,624 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1771469441, now seen corresponding path program 1 times [2025-04-13 20:53:57,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:57,624 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184290230] [2025-04-13 20:53:57,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:57,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-13 20:53:57,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 20:53:57,633 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:57,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:53:57,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:57,708 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184290230] [2025-04-13 20:53:57,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184290230] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:57,709 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554355804] [2025-04-13 20:53:57,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:53:57,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:57,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:57,710 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 20:53:57,712 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 20:53:57,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-13 20:53:57,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 20:53:57,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:57,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:57,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 20:53:57,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:53:57,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:53:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554355804] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:57,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:57,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-04-13 20:53:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543259142] [2025-04-13 20:53:57,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:57,916 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-13 20:53:57,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:57,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-13 20:53:57,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-04-13 20:53:57,917 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:57,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 163 transitions, 1912 flow. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 20:53:57,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:57,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:57,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:58,105 INFO L116 PetriNetUnfolderBase]: 533/996 cut-off events. [2025-04-13 20:53:58,106 INFO L117 PetriNetUnfolderBase]: For 6571/6571 co-relation queries the response was YES. [2025-04-13 20:53:58,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5401 conditions, 996 events. 533/996 cut-off events. For 6571/6571 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4650 event pairs, 244 based on Foata normal form. 78/1072 useless extension candidates. Maximal degree in co-relation 5349. Up to 551 conditions per place. [2025-04-13 20:53:58,111 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 74 selfloop transitions, 7 changer transitions 66/147 dead transitions. [2025-04-13 20:53:58,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 147 transitions, 1859 flow [2025-04-13 20:53:58,112 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:53:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:53:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2025-04-13 20:53:58,112 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36 [2025-04-13 20:53:58,112 INFO L175 Difference]: Start difference. First operand has 159 places, 163 transitions, 1912 flow. Second operand 8 states and 72 transitions. [2025-04-13 20:53:58,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 147 transitions, 1859 flow [2025-04-13 20:53:58,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 147 transitions, 1635 flow, removed 14 selfloop flow, removed 25 redundant places. [2025-04-13 20:53:58,131 INFO L231 Difference]: Finished difference. Result has 130 places, 61 transitions, 553 flow [2025-04-13 20:53:58,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=553, PETRI_PLACES=130, PETRI_TRANSITIONS=61} [2025-04-13 20:53:58,132 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 106 predicate places. [2025-04-13 20:53:58,132 INFO L485 AbstractCegarLoop]: Abstraction has has 130 places, 61 transitions, 553 flow [2025-04-13 20:53:58,132 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 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 20:53:58,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:58,132 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:58,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-13 20:53:58,336 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:58,336 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:58,336 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:58,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1055514223, now seen corresponding path program 6 times [2025-04-13 20:53:58,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:58,337 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416684121] [2025-04-13 20:53:58,337 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:53:58,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:58,341 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-04-13 20:53:58,348 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 23 statements. [2025-04-13 20:53:58,349 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:53:58,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:53:58,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:58,402 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416684121] [2025-04-13 20:53:58,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416684121] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:58,402 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757538481] [2025-04-13 20:53:58,402 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:53:58,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:58,404 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 20:53:58,405 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 20:53:58,440 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-04-13 20:53:58,452 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 23 statements. [2025-04-13 20:53:58,452 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:53:58,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:58,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 20:53:58,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:53:58,474 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:58,487 INFO L325 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-04-13 20:53:58,487 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2025-04-13 20:53:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:53:58,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757538481] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:58,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:58,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2025-04-13 20:53:58,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418218560] [2025-04-13 20:53:58,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:58,499 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:53:58,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:58,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:53:58,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:53:58,500 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:58,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 61 transitions, 553 flow. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:58,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:58,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:58,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:58,751 INFO L116 PetriNetUnfolderBase]: 401/753 cut-off events. [2025-04-13 20:53:58,751 INFO L117 PetriNetUnfolderBase]: For 4209/4209 co-relation queries the response was YES. [2025-04-13 20:53:58,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3694 conditions, 753 events. 401/753 cut-off events. For 4209/4209 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3175 event pairs, 52 based on Foata normal form. 20/773 useless extension candidates. Maximal degree in co-relation 3650. Up to 197 conditions per place. [2025-04-13 20:53:58,755 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 102 selfloop transitions, 24 changer transitions 18/144 dead transitions. [2025-04-13 20:53:58,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 144 transitions, 1401 flow [2025-04-13 20:53:58,755 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-13 20:53:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-13 20:53:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 128 transitions. [2025-04-13 20:53:58,756 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39384615384615385 [2025-04-13 20:53:58,756 INFO L175 Difference]: Start difference. First operand has 130 places, 61 transitions, 553 flow. Second operand 13 states and 128 transitions. [2025-04-13 20:53:58,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 144 transitions, 1401 flow [2025-04-13 20:53:58,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 144 transitions, 1221 flow, removed 55 selfloop flow, removed 26 redundant places. [2025-04-13 20:53:58,764 INFO L231 Difference]: Finished difference. Result has 88 places, 58 transitions, 539 flow [2025-04-13 20:53:58,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=539, PETRI_PLACES=88, PETRI_TRANSITIONS=58} [2025-04-13 20:53:58,764 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 64 predicate places. [2025-04-13 20:53:58,764 INFO L485 AbstractCegarLoop]: Abstraction has has 88 places, 58 transitions, 539 flow [2025-04-13 20:53:58,764 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:58,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:58,764 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:58,770 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 20:53:58,965 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,SelfDestructingSolverStorable12 [2025-04-13 20:53:58,965 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:53:58,965 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash -899530846, now seen corresponding path program 2 times [2025-04-13 20:53:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:58,965 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944811774] [2025-04-13 20:53:58,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:53:58,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:58,970 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-13 20:53:58,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-13 20:53:58,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:53:58,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:59,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:59,175 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944811774] [2025-04-13 20:53:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944811774] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:59,176 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266554243] [2025-04-13 20:53:59,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:53:59,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:59,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:59,178 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 20:53:59,179 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 20:53:59,217 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-13 20:53:59,231 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-13 20:53:59,231 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:53:59,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:59,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:53:59,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:59,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:59,454 INFO L325 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-04-13 20:53:59,454 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2025-04-13 20:53:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:59,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266554243] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:59,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:59,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2025-04-13 20:53:59,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658993851] [2025-04-13 20:53:59,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:59,679 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-13 20:53:59,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:59,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-13 20:53:59,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2025-04-13 20:53:59,680 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:59,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 58 transitions, 539 flow. Second operand has 30 states, 30 states have (on average 4.133333333333334) internal successors, (124), 30 states have internal predecessors, (124), 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 20:53:59,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:59,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:59,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:01,824 INFO L116 PetriNetUnfolderBase]: 1865/3224 cut-off events. [2025-04-13 20:54:01,825 INFO L117 PetriNetUnfolderBase]: For 31307/31307 co-relation queries the response was YES. [2025-04-13 20:54:01,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16613 conditions, 3224 events. 1865/3224 cut-off events. For 31307/31307 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 16561 event pairs, 65 based on Foata normal form. 277/3501 useless extension candidates. Maximal degree in co-relation 16583. Up to 743 conditions per place. [2025-04-13 20:54:01,840 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 453 selfloop transitions, 170 changer transitions 3/626 dead transitions. [2025-04-13 20:54:01,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 626 transitions, 6032 flow [2025-04-13 20:54:01,841 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2025-04-13 20:54:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2025-04-13 20:54:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 695 transitions. [2025-04-13 20:54:01,842 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4028985507246377 [2025-04-13 20:54:01,842 INFO L175 Difference]: Start difference. First operand has 88 places, 58 transitions, 539 flow. Second operand 69 states and 695 transitions. [2025-04-13 20:54:01,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 626 transitions, 6032 flow [2025-04-13 20:54:01,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 626 transitions, 5382 flow, removed 171 selfloop flow, removed 10 redundant places. [2025-04-13 20:54:01,887 INFO L231 Difference]: Finished difference. Result has 185 places, 231 transitions, 2963 flow [2025-04-13 20:54:01,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=2963, PETRI_PLACES=185, PETRI_TRANSITIONS=231} [2025-04-13 20:54:01,887 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 161 predicate places. [2025-04-13 20:54:01,888 INFO L485 AbstractCegarLoop]: Abstraction has has 185 places, 231 transitions, 2963 flow [2025-04-13 20:54:01,888 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.133333333333334) internal successors, (124), 30 states have internal predecessors, (124), 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 20:54:01,888 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:01,888 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:01,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-04-13 20:54:02,088 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,SelfDestructingSolverStorable13 [2025-04-13 20:54:02,088 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:54:02,089 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1427875945, now seen corresponding path program 3 times [2025-04-13 20:54:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:02,089 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966927038] [2025-04-13 20:54:02,089 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:54:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:02,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-04-13 20:54:02,097 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 25 statements. [2025-04-13 20:54:02,097 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:54:02,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-04-13 20:54:02,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:02,184 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966927038] [2025-04-13 20:54:02,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966927038] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:02,184 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944931403] [2025-04-13 20:54:02,184 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:54:02,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:02,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:02,187 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 20:54:02,188 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 20:54:02,249 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-04-13 20:54:02,263 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 25 statements. [2025-04-13 20:54:02,263 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:54:02,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:02,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 20:54:02,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-04-13 20:54:02,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:02,382 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-13 20:54:02,382 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2025-04-13 20:54:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-04-13 20:54:02,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944931403] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:02,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:02,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2025-04-13 20:54:02,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462276509] [2025-04-13 20:54:02,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:02,437 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:54:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:02,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:54:02,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:54:02,438 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:02,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 231 transitions, 2963 flow. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 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 20:54:02,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:02,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:02,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:03,151 INFO L116 PetriNetUnfolderBase]: 2014/3475 cut-off events. [2025-04-13 20:54:03,151 INFO L117 PetriNetUnfolderBase]: For 275387/275387 co-relation queries the response was YES. [2025-04-13 20:54:03,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27508 conditions, 3475 events. 2014/3475 cut-off events. For 275387/275387 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18666 event pairs, 106 based on Foata normal form. 214/3689 useless extension candidates. Maximal degree in co-relation 27433. Up to 1020 conditions per place. [2025-04-13 20:54:03,172 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 242 selfloop transitions, 167 changer transitions 4/413 dead transitions. [2025-04-13 20:54:03,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 413 transitions, 6341 flow [2025-04-13 20:54:03,172 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-13 20:54:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-13 20:54:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 166 transitions. [2025-04-13 20:54:03,173 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3688888888888889 [2025-04-13 20:54:03,173 INFO L175 Difference]: Start difference. First operand has 185 places, 231 transitions, 2963 flow. Second operand 18 states and 166 transitions. [2025-04-13 20:54:03,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 413 transitions, 6341 flow [2025-04-13 20:54:03,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 413 transitions, 5348 flow, removed 492 selfloop flow, removed 5 redundant places. [2025-04-13 20:54:03,531 INFO L231 Difference]: Finished difference. Result has 207 places, 299 transitions, 3791 flow [2025-04-13 20:54:03,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3791, PETRI_PLACES=207, PETRI_TRANSITIONS=299} [2025-04-13 20:54:03,532 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 183 predicate places. [2025-04-13 20:54:03,532 INFO L485 AbstractCegarLoop]: Abstraction has has 207 places, 299 transitions, 3791 flow [2025-04-13 20:54:03,532 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 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 20:54:03,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:03,532 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:03,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-04-13 20:54:03,733 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-13 20:54:03,733 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:54:03,733 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1832933953, now seen corresponding path program 4 times [2025-04-13 20:54:03,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:03,733 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623396498] [2025-04-13 20:54:03,733 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:54:03,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:03,738 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-04-13 20:54:03,744 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-13 20:54:03,744 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:54:03,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-04-13 20:54:03,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:03,861 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623396498] [2025-04-13 20:54:03,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623396498] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:03,861 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196134709] [2025-04-13 20:54:03,861 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:54:03,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:03,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:03,863 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:54:03,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-13 20:54:03,907 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-04-13 20:54:03,927 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-13 20:54:03,927 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:54:03,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:03,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-13 20:54:03,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:54:03,994 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:04,021 INFO L325 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-04-13 20:54:04,021 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2025-04-13 20:54:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-04-13 20:54:04,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196134709] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:04,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:04,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 13 [2025-04-13 20:54:04,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319245974] [2025-04-13 20:54:04,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:04,037 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-13 20:54:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:04,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-13 20:54:04,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2025-04-13 20:54:04,038 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:04,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 299 transitions, 3791 flow. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 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 20:54:04,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:04,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:04,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:04,928 INFO L116 PetriNetUnfolderBase]: 2932/5005 cut-off events. [2025-04-13 20:54:04,928 INFO L117 PetriNetUnfolderBase]: For 297168/297168 co-relation queries the response was YES. [2025-04-13 20:54:04,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41984 conditions, 5005 events. 2932/5005 cut-off events. For 297168/297168 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 29010 event pairs, 135 based on Foata normal form. 15/5020 useless extension candidates. Maximal degree in co-relation 41897. Up to 1382 conditions per place. [2025-04-13 20:54:04,963 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 379 selfloop transitions, 178 changer transitions 0/557 dead transitions. [2025-04-13 20:54:04,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 557 transitions, 7926 flow [2025-04-13 20:54:04,965 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-13 20:54:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-13 20:54:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 129 transitions. [2025-04-13 20:54:04,965 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36857142857142855 [2025-04-13 20:54:04,965 INFO L175 Difference]: Start difference. First operand has 207 places, 299 transitions, 3791 flow. Second operand 14 states and 129 transitions. [2025-04-13 20:54:04,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 557 transitions, 7926 flow [2025-04-13 20:54:05,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 557 transitions, 7574 flow, removed 104 selfloop flow, removed 17 redundant places. [2025-04-13 20:54:05,851 INFO L231 Difference]: Finished difference. Result has 204 places, 356 transitions, 5306 flow [2025-04-13 20:54:05,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5306, PETRI_PLACES=204, PETRI_TRANSITIONS=356} [2025-04-13 20:54:05,852 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 180 predicate places. [2025-04-13 20:54:05,852 INFO L485 AbstractCegarLoop]: Abstraction has has 204 places, 356 transitions, 5306 flow [2025-04-13 20:54:05,852 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 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 20:54:05,852 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:05,852 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:05,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-04-13 20:54:06,056 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-13 20:54:06,056 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:54:06,056 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:06,056 INFO L85 PathProgramCache]: Analyzing trace with hash 490017844, now seen corresponding path program 5 times [2025-04-13 20:54:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:06,057 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972183145] [2025-04-13 20:54:06,057 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:54:06,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:06,061 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:54:06,068 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:06,068 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:54:06,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:06,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:06,851 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972183145] [2025-04-13 20:54:06,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972183145] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:06,851 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855148218] [2025-04-13 20:54:06,851 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:54:06,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:06,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:06,853 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:54:06,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-13 20:54:06,895 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:54:06,914 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:06,914 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:54:06,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:06,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-04-13 20:54:06,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:07,516 INFO L325 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2025-04-13 20:54:07,516 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 46 treesize of output 19 [2025-04-13 20:54:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:07,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:07,832 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:54:07,832 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 50 treesize of output 53 [2025-04-13 20:54:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:08,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855148218] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:08,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2025-04-13 20:54:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590478942] [2025-04-13 20:54:08,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:08,222 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-04-13 20:54:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:08,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-04-13 20:54:08,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2025-04-13 20:54:08,223 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:08,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 356 transitions, 5306 flow. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 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 20:54:08,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:08,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:08,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:13,016 INFO L116 PetriNetUnfolderBase]: 4203/7191 cut-off events. [2025-04-13 20:54:13,017 INFO L117 PetriNetUnfolderBase]: For 484873/484873 co-relation queries the response was YES. [2025-04-13 20:54:13,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66205 conditions, 7191 events. 4203/7191 cut-off events. For 484873/484873 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 45645 event pairs, 389 based on Foata normal form. 2/7193 useless extension candidates. Maximal degree in co-relation 66130. Up to 2610 conditions per place. [2025-04-13 20:54:13,065 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 390 selfloop transitions, 490 changer transitions 10/890 dead transitions. [2025-04-13 20:54:13,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 890 transitions, 14063 flow [2025-04-13 20:54:13,066 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2025-04-13 20:54:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2025-04-13 20:54:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 524 transitions. [2025-04-13 20:54:13,067 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26871794871794874 [2025-04-13 20:54:13,067 INFO L175 Difference]: Start difference. First operand has 204 places, 356 transitions, 5306 flow. Second operand 78 states and 524 transitions. [2025-04-13 20:54:13,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 890 transitions, 14063 flow [2025-04-13 20:54:15,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 890 transitions, 13155 flow, removed 411 selfloop flow, removed 8 redundant places. [2025-04-13 20:54:15,077 INFO L231 Difference]: Finished difference. Result has 287 places, 669 transitions, 11881 flow [2025-04-13 20:54:15,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=11881, PETRI_PLACES=287, PETRI_TRANSITIONS=669} [2025-04-13 20:54:15,078 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 263 predicate places. [2025-04-13 20:54:15,078 INFO L485 AbstractCegarLoop]: Abstraction has has 287 places, 669 transitions, 11881 flow [2025-04-13 20:54:15,078 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 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 20:54:15,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:15,078 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:15,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-13 20:54:15,282 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-13 20:54:15,282 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:54:15,282 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1288521472, now seen corresponding path program 6 times [2025-04-13 20:54:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:15,283 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752778892] [2025-04-13 20:54:15,283 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:54:15,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:15,288 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:54:15,295 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:15,296 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:54:15,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:15,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:15,846 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752778892] [2025-04-13 20:54:15,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752778892] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:15,846 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584860183] [2025-04-13 20:54:15,846 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:54:15,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:15,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:15,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:54:15,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-13 20:54:15,887 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:54:15,904 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:15,904 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:54:15,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:15,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-04-13 20:54:15,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:16,352 INFO L325 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2025-04-13 20:54:16,352 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 20 [2025-04-13 20:54:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:16,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:16,932 INFO L325 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-04-13 20:54:16,932 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 50 treesize of output 45 [2025-04-13 20:54:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:17,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584860183] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:17,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:17,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 48 [2025-04-13 20:54:17,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671058104] [2025-04-13 20:54:17,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:17,243 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-04-13 20:54:17,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:17,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-04-13 20:54:17,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2123, Unknown=0, NotChecked=0, Total=2450 [2025-04-13 20:54:17,244 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:17,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 669 transitions, 11881 flow. Second operand has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 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 20:54:17,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:17,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:17,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:22,534 INFO L116 PetriNetUnfolderBase]: 4428/7613 cut-off events. [2025-04-13 20:54:22,534 INFO L117 PetriNetUnfolderBase]: For 280907/280907 co-relation queries the response was YES. [2025-04-13 20:54:22,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64323 conditions, 7613 events. 4428/7613 cut-off events. For 280907/280907 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 49478 event pairs, 366 based on Foata normal form. 1/7614 useless extension candidates. Maximal degree in co-relation 64233. Up to 3699 conditions per place. [2025-04-13 20:54:22,590 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 472 selfloop transitions, 458 changer transitions 27/957 dead transitions. [2025-04-13 20:54:22,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 957 transitions, 16911 flow [2025-04-13 20:54:22,590 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-04-13 20:54:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2025-04-13 20:54:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 390 transitions. [2025-04-13 20:54:22,591 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26 [2025-04-13 20:54:22,591 INFO L175 Difference]: Start difference. First operand has 287 places, 669 transitions, 11881 flow. Second operand 60 states and 390 transitions. [2025-04-13 20:54:22,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 957 transitions, 16911 flow [2025-04-13 20:54:25,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 957 transitions, 15003 flow, removed 947 selfloop flow, removed 7 redundant places. [2025-04-13 20:54:25,305 INFO L231 Difference]: Finished difference. Result has 350 places, 768 transitions, 13219 flow [2025-04-13 20:54:25,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10452, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=13219, PETRI_PLACES=350, PETRI_TRANSITIONS=768} [2025-04-13 20:54:25,305 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 326 predicate places. [2025-04-13 20:54:25,305 INFO L485 AbstractCegarLoop]: Abstraction has has 350 places, 768 transitions, 13219 flow [2025-04-13 20:54:25,306 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 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 20:54:25,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:25,306 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:25,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-13 20:54:25,506 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-04-13 20:54:25,506 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:54:25,506 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash 420689106, now seen corresponding path program 7 times [2025-04-13 20:54:25,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:25,507 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027620522] [2025-04-13 20:54:25,507 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:54:25,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:25,511 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:54:25,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:25,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:54:25,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:26,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:26,073 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027620522] [2025-04-13 20:54:26,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027620522] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:26,073 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650598287] [2025-04-13 20:54:26,073 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:54:26,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:26,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:26,074 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:54:26,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-13 20:54:26,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:54:26,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:26,126 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:54:26,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:26,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-04-13 20:54:26,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:26,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:26,891 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:54:26,892 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 51 treesize of output 53 [2025-04-13 20:54:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:27,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650598287] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:27,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:27,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2025-04-13 20:54:27,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792201361] [2025-04-13 20:54:27,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:27,301 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-04-13 20:54:27,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:27,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-04-13 20:54:27,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1930, Unknown=0, NotChecked=0, Total=2162 [2025-04-13 20:54:27,302 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:27,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 768 transitions, 13219 flow. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:54:27,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:27,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:27,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:31,733 INFO L116 PetriNetUnfolderBase]: 4716/8132 cut-off events. [2025-04-13 20:54:31,733 INFO L117 PetriNetUnfolderBase]: For 245599/245599 co-relation queries the response was YES. [2025-04-13 20:54:31,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65495 conditions, 8132 events. 4716/8132 cut-off events. For 245599/245599 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 53675 event pairs, 165 based on Foata normal form. 5/8041 useless extension candidates. Maximal degree in co-relation 65393. Up to 3769 conditions per place. [2025-04-13 20:54:31,802 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 521 selfloop transitions, 571 changer transitions 30/1122 dead transitions. [2025-04-13 20:54:31,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1122 transitions, 19112 flow [2025-04-13 20:54:31,802 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2025-04-13 20:54:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2025-04-13 20:54:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 445 transitions. [2025-04-13 20:54:31,804 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2870967741935484 [2025-04-13 20:54:31,804 INFO L175 Difference]: Start difference. First operand has 350 places, 768 transitions, 13219 flow. Second operand 62 states and 445 transitions. [2025-04-13 20:54:31,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1122 transitions, 19112 flow [2025-04-13 20:54:34,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1122 transitions, 18625 flow, removed 214 selfloop flow, removed 17 redundant places. [2025-04-13 20:54:34,124 INFO L231 Difference]: Finished difference. Result has 409 places, 900 transitions, 16859 flow [2025-04-13 20:54:34,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12836, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=16859, PETRI_PLACES=409, PETRI_TRANSITIONS=900} [2025-04-13 20:54:34,125 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 385 predicate places. [2025-04-13 20:54:34,125 INFO L485 AbstractCegarLoop]: Abstraction has has 409 places, 900 transitions, 16859 flow [2025-04-13 20:54:34,125 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:54:34,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:34,125 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:34,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-13 20:54:34,327 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:34,327 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:54:34,327 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash -825956394, now seen corresponding path program 8 times [2025-04-13 20:54:34,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:34,328 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676809042] [2025-04-13 20:54:34,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:54:34,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:34,332 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:54:34,339 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:34,339 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:54:34,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:34,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:34,822 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676809042] [2025-04-13 20:54:34,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676809042] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:34,822 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701658614] [2025-04-13 20:54:34,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:54:34,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:34,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:34,824 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:54:34,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-13 20:54:34,864 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:54:34,877 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:34,877 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:54:34,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:34,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-04-13 20:54:34,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:35,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:35,663 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:54:35,663 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 51 treesize of output 53 [2025-04-13 20:54:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:35,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701658614] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:35,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:35,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 46 [2025-04-13 20:54:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938837342] [2025-04-13 20:54:35,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:35,951 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-04-13 20:54:35,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:35,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-04-13 20:54:35,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2030, Unknown=0, NotChecked=0, Total=2256 [2025-04-13 20:54:35,952 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:35,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 900 transitions, 16859 flow. Second operand has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 20:54:35,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:35,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:35,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:43,443 INFO L116 PetriNetUnfolderBase]: 5043/8733 cut-off events. [2025-04-13 20:54:43,443 INFO L117 PetriNetUnfolderBase]: For 296936/296936 co-relation queries the response was YES. [2025-04-13 20:54:43,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76009 conditions, 8733 events. 5043/8733 cut-off events. For 296936/296936 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 59115 event pairs, 163 based on Foata normal form. 5/8662 useless extension candidates. Maximal degree in co-relation 75887. Up to 3769 conditions per place. [2025-04-13 20:54:43,518 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 572 selfloop transitions, 676 changer transitions 44/1292 dead transitions. [2025-04-13 20:54:43,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 1292 transitions, 23385 flow [2025-04-13 20:54:43,519 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2025-04-13 20:54:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2025-04-13 20:54:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 639 transitions. [2025-04-13 20:54:43,520 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2690526315789474 [2025-04-13 20:54:43,520 INFO L175 Difference]: Start difference. First operand has 409 places, 900 transitions, 16859 flow. Second operand 95 states and 639 transitions. [2025-04-13 20:54:43,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 1292 transitions, 23385 flow [2025-04-13 20:54:45,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1292 transitions, 22970 flow, removed 163 selfloop flow, removed 29 redundant places. [2025-04-13 20:54:45,985 INFO L231 Difference]: Finished difference. Result has 489 places, 1004 transitions, 21143 flow [2025-04-13 20:54:45,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=16516, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=576, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=21143, PETRI_PLACES=489, PETRI_TRANSITIONS=1004} [2025-04-13 20:54:45,986 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 465 predicate places. [2025-04-13 20:54:45,986 INFO L485 AbstractCegarLoop]: Abstraction has has 489 places, 1004 transitions, 21143 flow [2025-04-13 20:54:45,986 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 20:54:45,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:45,986 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:45,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-13 20:54:46,186 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:46,187 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:54:46,187 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1413701716, now seen corresponding path program 9 times [2025-04-13 20:54:46,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:46,188 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288659939] [2025-04-13 20:54:46,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:54:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:46,194 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:54:46,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:54:46,204 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:54:46,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:54:46,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:46,496 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288659939] [2025-04-13 20:54:46,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288659939] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:46,496 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421737085] [2025-04-13 20:54:46,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:54:46,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:46,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:46,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:54:46,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-13 20:54:46,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:54:46,557 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:54:46,557 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:54:46,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:46,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-04-13 20:54:46,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:54:46,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:46,955 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:54:46,956 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 63 treesize of output 56 [2025-04-13 20:54:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:54:47,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421737085] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:47,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:47,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2025-04-13 20:54:47,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438945055] [2025-04-13 20:54:47,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:47,018 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-13 20:54:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:47,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-13 20:54:47,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2025-04-13 20:54:47,019 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:47,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 1004 transitions, 21143 flow. Second operand has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 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 20:54:47,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:47,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:47,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:49,820 INFO L116 PetriNetUnfolderBase]: 5221/9112 cut-off events. [2025-04-13 20:54:49,820 INFO L117 PetriNetUnfolderBase]: For 371301/371301 co-relation queries the response was YES. [2025-04-13 20:54:49,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85782 conditions, 9112 events. 5221/9112 cut-off events. For 371301/371301 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 63054 event pairs, 161 based on Foata normal form. 9/9083 useless extension candidates. Maximal degree in co-relation 85646. Up to 4072 conditions per place. [2025-04-13 20:54:49,910 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 615 selfloop transitions, 508 changer transitions 73/1196 dead transitions. [2025-04-13 20:54:49,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1196 transitions, 25730 flow [2025-04-13 20:54:49,910 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-13 20:54:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-04-13 20:54:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 213 transitions. [2025-04-13 20:54:49,911 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.284 [2025-04-13 20:54:49,911 INFO L175 Difference]: Start difference. First operand has 489 places, 1004 transitions, 21143 flow. Second operand 30 states and 213 transitions. [2025-04-13 20:54:49,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1196 transitions, 25730 flow [2025-04-13 20:54:53,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 1196 transitions, 25266 flow, removed 163 selfloop flow, removed 37 redundant places. [2025-04-13 20:54:53,017 INFO L231 Difference]: Finished difference. Result has 482 places, 1013 transitions, 22870 flow [2025-04-13 20:54:53,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=20687, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=22870, PETRI_PLACES=482, PETRI_TRANSITIONS=1013} [2025-04-13 20:54:53,018 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 458 predicate places. [2025-04-13 20:54:53,018 INFO L485 AbstractCegarLoop]: Abstraction has has 482 places, 1013 transitions, 22870 flow [2025-04-13 20:54:53,018 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 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 20:54:53,018 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:53,018 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:53,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-04-13 20:54:53,218 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:53,218 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:54:53,219 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -716272682, now seen corresponding path program 10 times [2025-04-13 20:54:53,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:53,219 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51777200] [2025-04-13 20:54:53,219 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:54:53,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:53,225 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:54:53,233 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:53,233 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:54:53,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:53,644 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51777200] [2025-04-13 20:54:53,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51777200] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:53,644 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458643793] [2025-04-13 20:54:53,644 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:54:53,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:53,646 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:54:53,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-13 20:54:53,685 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:54:53,698 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:53,698 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:54:53,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:53,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 20:54:53,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:54,060 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:54:54,060 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 7 [2025-04-13 20:54:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:54,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:54,442 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:54:54,442 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 51 treesize of output 53 [2025-04-13 20:54:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:54,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458643793] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:54,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:54,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2025-04-13 20:54:54,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036308981] [2025-04-13 20:54:54,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:54,662 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-04-13 20:54:54,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:54,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-04-13 20:54:54,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2025-04-13 20:54:54,664 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:54,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1013 transitions, 22870 flow. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:54:54,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:54,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:54,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:05,578 INFO L116 PetriNetUnfolderBase]: 6263/11075 cut-off events. [2025-04-13 20:55:05,579 INFO L117 PetriNetUnfolderBase]: For 555123/555123 co-relation queries the response was YES. [2025-04-13 20:55:05,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115248 conditions, 11075 events. 6263/11075 cut-off events. For 555123/555123 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 81483 event pairs, 184 based on Foata normal form. 7/11044 useless extension candidates. Maximal degree in co-relation 115109. Up to 3615 conditions per place. [2025-04-13 20:55:05,721 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 680 selfloop transitions, 1009 changer transitions 45/1734 dead transitions. [2025-04-13 20:55:05,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1734 transitions, 38976 flow [2025-04-13 20:55:05,722 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2025-04-13 20:55:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2025-04-13 20:55:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 939 transitions. [2025-04-13 20:55:05,728 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2590344827586207 [2025-04-13 20:55:05,729 INFO L175 Difference]: Start difference. First operand has 482 places, 1013 transitions, 22870 flow. Second operand 145 states and 939 transitions. [2025-04-13 20:55:05,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1734 transitions, 38976 flow [2025-04-13 20:55:11,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 1734 transitions, 38883 flow, removed 33 selfloop flow, removed 9 redundant places. [2025-04-13 20:55:11,268 INFO L231 Difference]: Finished difference. Result has 639 places, 1366 transitions, 35852 flow [2025-04-13 20:55:11,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=22787, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=688, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=145, PETRI_FLOW=35852, PETRI_PLACES=639, PETRI_TRANSITIONS=1366} [2025-04-13 20:55:11,269 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 615 predicate places. [2025-04-13 20:55:11,269 INFO L485 AbstractCegarLoop]: Abstraction has has 639 places, 1366 transitions, 35852 flow [2025-04-13 20:55:11,269 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:55:11,269 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:11,269 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:55:11,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-04-13 20:55:11,469 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:11,470 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:55:11,470 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash -193079296, now seen corresponding path program 11 times [2025-04-13 20:55:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:11,470 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984455494] [2025-04-13 20:55:11,470 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:55:11,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:11,475 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:55:11,482 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:55:11,482 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:55:11,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:12,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:12,115 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984455494] [2025-04-13 20:55:12,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984455494] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:55:12,115 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87307380] [2025-04-13 20:55:12,115 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:55:12,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:12,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:55:12,116 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:55:12,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-04-13 20:55:12,157 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:55:12,172 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:55:12,172 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:55:12,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:12,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-13 20:55:12,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:55:12,534 INFO L325 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2025-04-13 20:55:12,534 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 18 [2025-04-13 20:55:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:12,697 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:55:13,061 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:55:13,061 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 50 treesize of output 53 [2025-04-13 20:55:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:13,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87307380] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:55:13,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:55:13,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2025-04-13 20:55:13,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271990469] [2025-04-13 20:55:13,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:55:13,427 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-04-13 20:55:13,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:13,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-04-13 20:55:13,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2025-04-13 20:55:13,428 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:55:13,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 1366 transitions, 35852 flow. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:55:13,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:13,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:55:13,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:28,757 INFO L116 PetriNetUnfolderBase]: 7743/13842 cut-off events. [2025-04-13 20:55:28,757 INFO L117 PetriNetUnfolderBase]: For 893907/893907 co-relation queries the response was YES. [2025-04-13 20:55:28,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159714 conditions, 13842 events. 7743/13842 cut-off events. For 893907/893907 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 108915 event pairs, 493 based on Foata normal form. 18/13818 useless extension candidates. Maximal degree in co-relation 159546. Up to 4400 conditions per place. [2025-04-13 20:55:28,917 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 710 selfloop transitions, 1348 changer transitions 109/2167 dead transitions. [2025-04-13 20:55:28,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 2167 transitions, 56064 flow [2025-04-13 20:55:28,918 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2025-04-13 20:55:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2025-04-13 20:55:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 987 transitions. [2025-04-13 20:55:28,919 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2614569536423841 [2025-04-13 20:55:28,919 INFO L175 Difference]: Start difference. First operand has 639 places, 1366 transitions, 35852 flow. Second operand 151 states and 987 transitions. [2025-04-13 20:55:28,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 2167 transitions, 56064 flow [2025-04-13 20:55:44,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 729 places, 2167 transitions, 52769 flow, removed 1508 selfloop flow, removed 52 redundant places. [2025-04-13 20:55:44,397 INFO L231 Difference]: Finished difference. Result has 760 places, 1730 transitions, 48560 flow [2025-04-13 20:55:44,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=33691, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=992, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=151, PETRI_FLOW=48560, PETRI_PLACES=760, PETRI_TRANSITIONS=1730} [2025-04-13 20:55:44,399 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 736 predicate places. [2025-04-13 20:55:44,399 INFO L485 AbstractCegarLoop]: Abstraction has has 760 places, 1730 transitions, 48560 flow [2025-04-13 20:55:44,399 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:55:44,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:44,399 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:55:44,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-04-13 20:55:44,599 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:44,600 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:55:44,600 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash -156361496, now seen corresponding path program 12 times [2025-04-13 20:55:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:44,601 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496480335] [2025-04-13 20:55:44,601 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:55:44,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:44,605 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:55:44,612 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:55:44,612 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:55:44,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:45,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:45,020 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496480335] [2025-04-13 20:55:45,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496480335] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:55:45,021 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297587869] [2025-04-13 20:55:45,021 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:55:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:45,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:55:45,022 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:55:45,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-04-13 20:55:45,065 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:55:45,086 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:55:45,086 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:55:45,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:45,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-04-13 20:55:45,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:55:45,607 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-13 20:55:45,616 INFO L325 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2025-04-13 20:55:45,616 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 26 [2025-04-13 20:55:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:45,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:55:46,093 INFO L325 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2025-04-13 20:55:46,093 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 65 [2025-04-13 20:55:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:46,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297587869] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:55:46,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:55:46,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 48 [2025-04-13 20:55:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43880405] [2025-04-13 20:55:46,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:55:46,476 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-04-13 20:55:46,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:46,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-04-13 20:55:46,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=2125, Unknown=0, NotChecked=0, Total=2450 [2025-04-13 20:55:46,476 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:55:46,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 760 places, 1730 transitions, 48560 flow. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 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 20:55:46,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:46,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:55:46,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:55,564 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:56:00,073 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:56:08,352 INFO L116 PetriNetUnfolderBase]: 8691/15502 cut-off events. [2025-04-13 20:56:08,352 INFO L117 PetriNetUnfolderBase]: For 941080/941080 co-relation queries the response was YES. [2025-04-13 20:56:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180921 conditions, 15502 events. 8691/15502 cut-off events. For 941080/941080 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 123381 event pairs, 651 based on Foata normal form. 6/15458 useless extension candidates. Maximal degree in co-relation 180727. Up to 6502 conditions per place. [2025-04-13 20:56:08,654 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 956 selfloop transitions, 1497 changer transitions 36/2489 dead transitions. [2025-04-13 20:56:08,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 2489 transitions, 66920 flow [2025-04-13 20:56:08,655 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2025-04-13 20:56:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2025-04-13 20:56:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 856 transitions. [2025-04-13 20:56:08,657 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25744360902255636 [2025-04-13 20:56:08,657 INFO L175 Difference]: Start difference. First operand has 760 places, 1730 transitions, 48560 flow. Second operand 133 states and 856 transitions. [2025-04-13 20:56:08,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 863 places, 2489 transitions, 66920 flow [2025-04-13 20:56:22,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 2489 transitions, 64844 flow, removed 899 selfloop flow, removed 66 redundant places. [2025-04-13 20:56:22,119 INFO L231 Difference]: Finished difference. Result has 848 places, 2118 transitions, 63226 flow [2025-04-13 20:56:22,120 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=47025, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=133, PETRI_FLOW=63226, PETRI_PLACES=848, PETRI_TRANSITIONS=2118} [2025-04-13 20:56:22,120 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 824 predicate places. [2025-04-13 20:56:22,121 INFO L485 AbstractCegarLoop]: Abstraction has has 848 places, 2118 transitions, 63226 flow [2025-04-13 20:56:22,121 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 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 20:56:22,121 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:56:22,121 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:56:22,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-04-13 20:56:22,321 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:22,321 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:56:22,323 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:56:22,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1077379486, now seen corresponding path program 13 times [2025-04-13 20:56:22,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:56:22,323 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697748738] [2025-04-13 20:56:22,323 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:56:22,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:56:22,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:56:22,335 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:56:22,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:56:22,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:23,314 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 20:56:23,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:56:23,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697748738] [2025-04-13 20:56:23,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697748738] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:56:23,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142194385] [2025-04-13 20:56:23,315 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:56:23,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:23,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:56:23,316 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:56:23,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-04-13 20:56:23,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:56:23,379 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:56:23,379 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:56:23,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:23,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-04-13 20:56:23,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:56:23,827 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:56:23,827 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2025-04-13 20:56:23,909 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 20:56:23,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:56:24,228 INFO L325 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2025-04-13 20:56:24,229 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 51 treesize of output 43 [2025-04-13 20:56:24,460 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 20:56:24,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142194385] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:56:24,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:56:24,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 46 [2025-04-13 20:56:24,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503571369] [2025-04-13 20:56:24,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:56:24,461 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-04-13 20:56:24,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:56:24,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-04-13 20:56:24,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1940, Unknown=0, NotChecked=0, Total=2256 [2025-04-13 20:56:24,462 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:56:24,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 2118 transitions, 63226 flow. Second operand has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 20:56:24,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:56:24,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:56:24,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:56:37,971 INFO L116 PetriNetUnfolderBase]: 10149/18117 cut-off events. [2025-04-13 20:56:37,972 INFO L117 PetriNetUnfolderBase]: For 1171997/1171997 co-relation queries the response was YES. [2025-04-13 20:56:38,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226441 conditions, 18117 events. 10149/18117 cut-off events. For 1171997/1171997 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 148783 event pairs, 420 based on Foata normal form. 60/18073 useless extension candidates. Maximal degree in co-relation 226210. Up to 6935 conditions per place. [2025-04-13 20:56:38,262 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 978 selfloop transitions, 1734 changer transitions 104/2816 dead transitions. [2025-04-13 20:56:38,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 931 places, 2816 transitions, 84791 flow [2025-04-13 20:56:38,262 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2025-04-13 20:56:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2025-04-13 20:56:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 631 transitions. [2025-04-13 20:56:38,264 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28044444444444444 [2025-04-13 20:56:38,264 INFO L175 Difference]: Start difference. First operand has 848 places, 2118 transitions, 63226 flow. Second operand 90 states and 631 transitions. [2025-04-13 20:56:38,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 931 places, 2816 transitions, 84791 flow [2025-04-13 20:57:00,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 883 places, 2816 transitions, 82965 flow, removed 785 selfloop flow, removed 48 redundant places. [2025-04-13 20:57:00,121 INFO L231 Difference]: Finished difference. Result has 919 places, 2470 transitions, 78397 flow [2025-04-13 20:57:00,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=59590, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=78397, PETRI_PLACES=919, PETRI_TRANSITIONS=2470} [2025-04-13 20:57:00,123 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 895 predicate places. [2025-04-13 20:57:00,123 INFO L485 AbstractCegarLoop]: Abstraction has has 919 places, 2470 transitions, 78397 flow [2025-04-13 20:57:00,123 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 20:57:00,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:57:00,124 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:57:00,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-04-13 20:57:00,327 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-04-13 20:57:00,327 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:57:00,327 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:57:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash -76944218, now seen corresponding path program 14 times [2025-04-13 20:57:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:57:00,328 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164284068] [2025-04-13 20:57:00,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:57:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:57:00,333 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:57:00,338 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:57:00,338 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:57:00,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:57:00,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:57:00,743 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164284068] [2025-04-13 20:57:00,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164284068] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:57:00,743 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863033150] [2025-04-13 20:57:00,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:57:00,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:57:00,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:57:00,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:57:00,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-04-13 20:57:00,788 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:57:00,802 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:57:00,802 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:57:00,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:00,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-13 20:57:00,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:57:01,184 INFO L325 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2025-04-13 20:57:01,184 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 46 treesize of output 39 [2025-04-13 20:57:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:57:01,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:57:01,669 INFO L325 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-04-13 20:57:01,670 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 50 treesize of output 45 [2025-04-13 20:57:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:57:02,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863033150] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:57:02,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:57:02,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 46 [2025-04-13 20:57:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007927466] [2025-04-13 20:57:02,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:57:02,047 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-04-13 20:57:02,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:57:02,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-04-13 20:57:02,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2025-04-13 20:57:02,048 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:57:02,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 919 places, 2470 transitions, 78397 flow. Second operand has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 20:57:02,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:57:02,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:57:02,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:57:18,303 INFO L116 PetriNetUnfolderBase]: 10758/19182 cut-off events. [2025-04-13 20:57:18,304 INFO L117 PetriNetUnfolderBase]: For 1362642/1362642 co-relation queries the response was YES. [2025-04-13 20:57:18,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252328 conditions, 19182 events. 10758/19182 cut-off events. For 1362642/1362642 co-relation queries the response was YES. Maximal size of possible extension queue 1174. Compared 158739 event pairs, 701 based on Foata normal form. 5/19143 useless extension candidates. Maximal degree in co-relation 252068. Up to 7925 conditions per place. [2025-04-13 20:57:18,706 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 1045 selfloop transitions, 1879 changer transitions 44/2968 dead transitions. [2025-04-13 20:57:18,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 972 places, 2968 transitions, 95154 flow [2025-04-13 20:57:18,707 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2025-04-13 20:57:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2025-04-13 20:57:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 581 transitions. [2025-04-13 20:57:18,708 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2702325581395349 [2025-04-13 20:57:18,708 INFO L175 Difference]: Start difference. First operand has 919 places, 2470 transitions, 78397 flow. Second operand 86 states and 581 transitions. [2025-04-13 20:57:18,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 972 places, 2968 transitions, 95154 flow [2025-04-13 20:57:48,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 939 places, 2968 transitions, 92075 flow, removed 1503 selfloop flow, removed 33 redundant places. [2025-04-13 20:57:48,365 INFO L231 Difference]: Finished difference. Result has 963 places, 2702 transitions, 89782 flow [2025-04-13 20:57:48,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=76100, PETRI_DIFFERENCE_MINUEND_PLACES=854, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=89782, PETRI_PLACES=963, PETRI_TRANSITIONS=2702} [2025-04-13 20:57:48,368 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 939 predicate places. [2025-04-13 20:57:48,368 INFO L485 AbstractCegarLoop]: Abstraction has has 963 places, 2702 transitions, 89782 flow [2025-04-13 20:57:48,368 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 20:57:48,368 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:57:48,368 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:57:48,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-04-13 20:57:48,568 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-04-13 20:57:48,569 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:57:48,569 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:57:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -694217074, now seen corresponding path program 15 times [2025-04-13 20:57:48,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:57:48,570 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583602260] [2025-04-13 20:57:48,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:57:48,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:57:48,574 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:57:48,581 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:57:48,581 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:57:48,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:57:48,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:57:48,785 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583602260] [2025-04-13 20:57:48,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583602260] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:57:48,786 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709957541] [2025-04-13 20:57:48,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:57:48,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:57:48,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:57:48,787 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:57:48,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-04-13 20:57:48,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:57:48,846 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:57:48,846 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:57:48,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:57:48,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:57:48,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:57:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:57:49,018 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:57:49,162 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:57:49,162 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 51 treesize of output 53 [2025-04-13 20:57:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:57:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709957541] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:57:49,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:57:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2025-04-13 20:57:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371662776] [2025-04-13 20:57:49,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:57:49,208 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-13 20:57:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:57:49,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-13 20:57:49,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2025-04-13 20:57:49,208 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:57:49,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 963 places, 2702 transitions, 89782 flow. Second operand has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 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 20:57:49,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:57:49,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:57:49,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:58:04,132 INFO L116 PetriNetUnfolderBase]: 10947/19531 cut-off events. [2025-04-13 20:58:04,133 INFO L117 PetriNetUnfolderBase]: For 1376086/1376086 co-relation queries the response was YES. [2025-04-13 20:58:04,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259922 conditions, 19531 events. 10947/19531 cut-off events. For 1376086/1376086 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 162009 event pairs, 635 based on Foata normal form. 9/19498 useless extension candidates. Maximal degree in co-relation 259649. Up to 10046 conditions per place. [2025-04-13 20:58:04,564 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 1338 selfloop transitions, 1484 changer transitions 80/2902 dead transitions. [2025-04-13 20:58:04,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 979 places, 2902 transitions, 99350 flow [2025-04-13 20:58:04,565 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-13 20:58:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-13 20:58:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 198 transitions. [2025-04-13 20:58:04,566 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29333333333333333 [2025-04-13 20:58:04,566 INFO L175 Difference]: Start difference. First operand has 963 places, 2702 transitions, 89782 flow. Second operand 27 states and 198 transitions. [2025-04-13 20:58:04,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 979 places, 2902 transitions, 99350 flow [2025-04-13 20:58:36,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 943 places, 2902 transitions, 98161 flow, removed 517 selfloop flow, removed 36 redundant places. [2025-04-13 20:58:36,298 INFO L231 Difference]: Finished difference. Result has 953 places, 2728 transitions, 93965 flow [2025-04-13 20:58:36,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=88616, PETRI_DIFFERENCE_MINUEND_PLACES=917, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=93965, PETRI_PLACES=953, PETRI_TRANSITIONS=2728} [2025-04-13 20:58:36,300 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 929 predicate places. [2025-04-13 20:58:36,300 INFO L485 AbstractCegarLoop]: Abstraction has has 953 places, 2728 transitions, 93965 flow [2025-04-13 20:58:36,300 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 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 20:58:36,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:58:36,301 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:58:36,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-04-13 20:58:36,501 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-04-13 20:58:36,501 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:58:36,502 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:58:36,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1848540778, now seen corresponding path program 16 times [2025-04-13 20:58:36,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:58:36,502 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654118018] [2025-04-13 20:58:36,502 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:58:36,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:58:36,507 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:58:36,515 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:58:36,515 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:58:36,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:58:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:58:36,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:58:36,808 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654118018] [2025-04-13 20:58:36,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654118018] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:58:36,808 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123138391] [2025-04-13 20:58:36,808 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:58:36,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:58:36,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:58:36,811 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:58:36,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-04-13 20:58:36,861 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:58:36,877 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:58:36,878 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:58:36,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:58:36,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 20:58:36,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:58:37,204 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:58:37,204 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 7 [2025-04-13 20:58:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:58:37,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:58:37,526 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:58:37,526 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 51 treesize of output 53 [2025-04-13 20:58:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:58:37,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123138391] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:58:37,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:58:37,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2025-04-13 20:58:37,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005487078] [2025-04-13 20:58:37,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:58:37,735 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-04-13 20:58:37,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:58:37,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-04-13 20:58:37,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2025-04-13 20:58:37,736 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:58:37,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 953 places, 2728 transitions, 93965 flow. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:58:37,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:58:37,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:58:37,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:58:57,373 INFO L116 PetriNetUnfolderBase]: 11236/19996 cut-off events. [2025-04-13 20:58:57,373 INFO L117 PetriNetUnfolderBase]: For 1525320/1525320 co-relation queries the response was YES. [2025-04-13 20:58:57,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278249 conditions, 19996 events. 11236/19996 cut-off events. For 1525320/1525320 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 166546 event pairs, 486 based on Foata normal form. 5/19953 useless extension candidates. Maximal degree in co-relation 277972. Up to 9131 conditions per place. [2025-04-13 20:58:57,728 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 1271 selfloop transitions, 1854 changer transitions 58/3183 dead transitions. [2025-04-13 20:58:57,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1051 places, 3183 transitions, 108949 flow [2025-04-13 20:58:57,728 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2025-04-13 20:58:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2025-04-13 20:58:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 723 transitions. [2025-04-13 20:58:57,730 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25821428571428573 [2025-04-13 20:58:57,730 INFO L175 Difference]: Start difference. First operand has 953 places, 2728 transitions, 93965 flow. Second operand 112 states and 723 transitions. [2025-04-13 20:58:57,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1051 places, 3183 transitions, 108949 flow [2025-04-13 20:59:31,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1036 places, 3183 transitions, 108691 flow, removed 83 selfloop flow, removed 15 redundant places. [2025-04-13 20:59:31,087 INFO L231 Difference]: Finished difference. Result has 1064 places, 2873 transitions, 105182 flow [2025-04-13 20:59:31,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=93724, PETRI_DIFFERENCE_MINUEND_PLACES=925, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=105182, PETRI_PLACES=1064, PETRI_TRANSITIONS=2873} [2025-04-13 20:59:31,090 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1040 predicate places. [2025-04-13 20:59:31,090 INFO L485 AbstractCegarLoop]: Abstraction has has 1064 places, 2873 transitions, 105182 flow [2025-04-13 20:59:31,090 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:59:31,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:59:31,090 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:59:31,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-04-13 20:59:31,290 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:59:31,291 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:59:31,291 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:59:31,292 INFO L85 PathProgramCache]: Analyzing trace with hash -358988308, now seen corresponding path program 17 times [2025-04-13 20:59:31,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:59:31,292 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159549224] [2025-04-13 20:59:31,292 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:59:31,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:59:31,297 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:59:31,303 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:59:31,303 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:59:31,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:59:31,796 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 20:59:31,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:59:31,796 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159549224] [2025-04-13 20:59:31,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159549224] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:59:31,796 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492953933] [2025-04-13 20:59:31,796 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:59:31,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:59:31,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:59:31,798 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:59:31,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-04-13 20:59:31,849 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:59:31,865 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:59:31,865 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:59:31,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:59:31,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 20:59:31,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:59:32,258 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:59:32,258 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 7 [2025-04-13 20:59:32,340 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 20:59:32,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:59:32,635 INFO L325 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2025-04-13 20:59:32,635 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 51 treesize of output 43 [2025-04-13 20:59:32,882 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 20:59:32,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492953933] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:59:32,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:59:32,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2025-04-13 20:59:32,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285492485] [2025-04-13 20:59:32,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:59:32,882 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-04-13 20:59:32,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:59:32,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-04-13 20:59:32,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2025-04-13 20:59:32,884 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:59:32,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1064 places, 2873 transitions, 105182 flow. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 20:59:32,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:59:32,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:59:32,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:59:53,463 INFO L116 PetriNetUnfolderBase]: 11731/20947 cut-off events. [2025-04-13 20:59:53,463 INFO L117 PetriNetUnfolderBase]: For 1765638/1765638 co-relation queries the response was YES. [2025-04-13 20:59:53,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306729 conditions, 20947 events. 11731/20947 cut-off events. For 1765638/1765638 co-relation queries the response was YES. Maximal size of possible extension queue 1328. Compared 176974 event pairs, 626 based on Foata normal form. 52/20959 useless extension candidates. Maximal degree in co-relation 306427. Up to 10494 conditions per place. [2025-04-13 20:59:54,038 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 1487 selfloop transitions, 1714 changer transitions 65/3266 dead transitions. [2025-04-13 20:59:54,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1133 places, 3266 transitions, 120455 flow [2025-04-13 20:59:54,038 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2025-04-13 20:59:54,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2025-04-13 20:59:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 547 transitions. [2025-04-13 20:59:54,039 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2604761904761905 [2025-04-13 20:59:54,039 INFO L175 Difference]: Start difference. First operand has 1064 places, 2873 transitions, 105182 flow. Second operand 84 states and 547 transitions. [2025-04-13 20:59:54,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1133 places, 3266 transitions, 120455 flow [2025-04-13 21:00:33,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1083 places, 3266 transitions, 119358 flow, removed 371 selfloop flow, removed 50 redundant places. [2025-04-13 21:00:33,124 INFO L231 Difference]: Finished difference. Result has 1109 places, 2997 transitions, 113169 flow [2025-04-13 21:00:33,126 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=104106, PETRI_DIFFERENCE_MINUEND_PLACES=1000, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=113169, PETRI_PLACES=1109, PETRI_TRANSITIONS=2997} [2025-04-13 21:00:33,127 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1085 predicate places. [2025-04-13 21:00:33,127 INFO L485 AbstractCegarLoop]: Abstraction has has 1109 places, 2997 transitions, 113169 flow [2025-04-13 21:00:33,128 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 21:00:33,128 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:00:33,128 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:00:33,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-04-13 21:00:33,328 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-04-13 21:00:33,328 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:00:33,329 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:00:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1686122486, now seen corresponding path program 18 times [2025-04-13 21:00:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:00:33,329 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763390619] [2025-04-13 21:00:33,329 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 21:00:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:00:33,334 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 21:00:33,341 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:00:33,341 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 21:00:33,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:00:33,782 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 21:00:33,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:00:33,782 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763390619] [2025-04-13 21:00:33,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763390619] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:00:33,782 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349279535] [2025-04-13 21:00:33,782 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 21:00:33,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:00:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:00:33,785 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 21:00:33,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-04-13 21:00:33,839 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 21:00:33,857 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:00:33,857 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 21:00:33,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:00:33,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-13 21:00:33,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:00:34,425 INFO L325 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2025-04-13 21:00:34,426 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 45 treesize of output 24 [2025-04-13 21:00:34,576 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 21:00:34,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:00:35,025 INFO L325 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2025-04-13 21:00:35,025 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 41 [2025-04-13 21:00:35,483 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 21:00:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349279535] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:00:35,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:00:35,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 48 [2025-04-13 21:00:35,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363735755] [2025-04-13 21:00:35,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:00:35,484 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-04-13 21:00:35,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:00:35,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-04-13 21:00:35,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2025-04-13 21:00:35,485 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 21:00:35,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1109 places, 2997 transitions, 113169 flow. Second operand has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 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 21:00:35,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:00:35,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 21:00:35,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:01:03,473 INFO L116 PetriNetUnfolderBase]: 12201/21776 cut-off events. [2025-04-13 21:01:03,473 INFO L117 PetriNetUnfolderBase]: For 1980470/1980470 co-relation queries the response was YES. [2025-04-13 21:01:03,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328462 conditions, 21776 events. 12201/21776 cut-off events. For 1980470/1980470 co-relation queries the response was YES. Maximal size of possible extension queue 1390. Compared 185235 event pairs, 542 based on Foata normal form. 3/21741 useless extension candidates. Maximal degree in co-relation 328146. Up to 9876 conditions per place. [2025-04-13 21:01:03,961 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1372 selfloop transitions, 2041 changer transitions 29/3442 dead transitions. [2025-04-13 21:01:03,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1208 places, 3442 transitions, 129331 flow [2025-04-13 21:01:03,961 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2025-04-13 21:01:03,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2025-04-13 21:01:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 677 transitions. [2025-04-13 21:01:03,963 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24618181818181817 [2025-04-13 21:01:03,963 INFO L175 Difference]: Start difference. First operand has 1109 places, 2997 transitions, 113169 flow. Second operand 110 states and 677 transitions. [2025-04-13 21:01:03,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1208 places, 3442 transitions, 129331 flow [2025-04-13 21:01:46,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1172 places, 3442 transitions, 127916 flow, removed 595 selfloop flow, removed 36 redundant places. [2025-04-13 21:01:46,406 INFO L231 Difference]: Finished difference. Result has 1190 places, 3207 transitions, 123923 flow [2025-04-13 21:01:46,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=111962, PETRI_DIFFERENCE_MINUEND_PLACES=1063, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1861, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=123923, PETRI_PLACES=1190, PETRI_TRANSITIONS=3207} [2025-04-13 21:01:46,409 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1166 predicate places. [2025-04-13 21:01:46,409 INFO L485 AbstractCegarLoop]: Abstraction has has 1190 places, 3207 transitions, 123923 flow [2025-04-13 21:01:46,409 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.52) internal successors, (176), 50 states have internal predecessors, (176), 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 21:01:46,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:01:46,409 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:01:46,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-04-13 21:01:46,610 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:01:46,610 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:01:46,611 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:01:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash 183614166, now seen corresponding path program 19 times [2025-04-13 21:01:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:01:46,611 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171773487] [2025-04-13 21:01:46,611 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 21:01:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:01:46,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 21:01:46,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:01:46,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:01:46,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:01:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:01:47,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:01:47,094 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171773487] [2025-04-13 21:01:47,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171773487] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:01:47,094 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180270539] [2025-04-13 21:01:47,094 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 21:01:47,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:01:47,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:01:47,096 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 21:01:47,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-04-13 21:01:47,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 21:01:47,157 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:01:47,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:01:47,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:01:47,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-04-13 21:01:47,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:01:47,540 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 21:01:47,540 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2025-04-13 21:01:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:01:47,671 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:01:47,984 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 21:01:47,985 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 51 treesize of output 53 [2025-04-13 21:01:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:01:48,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180270539] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:01:48,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:01:48,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 46 [2025-04-13 21:01:48,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518254788] [2025-04-13 21:01:48,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:01:48,246 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-04-13 21:01:48,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:01:48,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-04-13 21:01:48,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1983, Unknown=0, NotChecked=0, Total=2256 [2025-04-13 21:01:48,247 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 21:01:48,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1190 places, 3207 transitions, 123923 flow. Second operand has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 21:01:48,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:01:48,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 21:01:48,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:02:15,957 INFO L116 PetriNetUnfolderBase]: 13160/23597 cut-off events. [2025-04-13 21:02:15,957 INFO L117 PetriNetUnfolderBase]: For 2304595/2304595 co-relation queries the response was YES. [2025-04-13 21:02:16,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369648 conditions, 23597 events. 13160/23597 cut-off events. For 2304595/2304595 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 202741 event pairs, 600 based on Foata normal form. 47/23600 useless extension candidates. Maximal degree in co-relation 369327. Up to 10706 conditions per place. [2025-04-13 21:02:16,596 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 1597 selfloop transitions, 2042 changer transitions 51/3690 dead transitions. [2025-04-13 21:02:16,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1276 places, 3690 transitions, 144824 flow [2025-04-13 21:02:16,597 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2025-04-13 21:02:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2025-04-13 21:02:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 592 transitions. [2025-04-13 21:02:16,598 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2573913043478261 [2025-04-13 21:02:16,598 INFO L175 Difference]: Start difference. First operand has 1190 places, 3207 transitions, 123923 flow. Second operand 92 states and 592 transitions. [2025-04-13 21:02:16,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1276 places, 3690 transitions, 144824 flow [2025-04-13 21:03:10,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1227 places, 3690 transitions, 143011 flow, removed 698 selfloop flow, removed 49 redundant places. [2025-04-13 21:03:10,612 INFO L231 Difference]: Finished difference. Result has 1253 places, 3425 transitions, 136987 flow [2025-04-13 21:03:10,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=122022, PETRI_DIFFERENCE_MINUEND_PLACES=1136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1838, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=136987, PETRI_PLACES=1253, PETRI_TRANSITIONS=3425} [2025-04-13 21:03:10,614 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1229 predicate places. [2025-04-13 21:03:10,614 INFO L485 AbstractCegarLoop]: Abstraction has has 1253 places, 3425 transitions, 136987 flow [2025-04-13 21:03:10,615 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 21:03:10,615 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:03:10,615 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:03:10,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-04-13 21:03:10,815 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2025-04-13 21:03:10,815 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:03:10,816 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:03:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash 168951974, now seen corresponding path program 20 times [2025-04-13 21:03:10,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:03:10,817 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407815709] [2025-04-13 21:03:10,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:03:10,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:03:10,821 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 21:03:10,828 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:03:10,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:03:10,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:03:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:03:11,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:03:11,261 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407815709] [2025-04-13 21:03:11,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407815709] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:03:11,261 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809082473] [2025-04-13 21:03:11,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:03:11,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:03:11,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:03:11,263 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 21:03:11,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-04-13 21:03:11,313 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 21:03:11,327 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:03:11,327 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:03:11,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:03:11,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-13 21:03:11,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:03:11,692 INFO L325 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2025-04-13 21:03:11,692 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 18 [2025-04-13 21:03:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:03:11,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:03:12,118 INFO L325 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-04-13 21:03:12,119 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 50 treesize of output 45 [2025-04-13 21:03:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:03:12,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809082473] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:03:12,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:03:12,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 46 [2025-04-13 21:03:12,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775382144] [2025-04-13 21:03:12,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:03:12,529 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-04-13 21:03:12,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:03:12,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-04-13 21:03:12,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2025-04-13 21:03:12,530 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 21:03:12,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1253 places, 3425 transitions, 136987 flow. Second operand has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 21:03:12,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:03:12,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 21:03:12,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:03:42,132 INFO L116 PetriNetUnfolderBase]: 13564/24376 cut-off events. [2025-04-13 21:03:42,132 INFO L117 PetriNetUnfolderBase]: For 2535288/2535288 co-relation queries the response was YES. [2025-04-13 21:03:42,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391316 conditions, 24376 events. 13564/24376 cut-off events. For 2535288/2535288 co-relation queries the response was YES. Maximal size of possible extension queue 1467. Compared 210606 event pairs, 990 based on Foata normal form. 5/24333 useless extension candidates. Maximal degree in co-relation 390979. Up to 11698 conditions per place. [2025-04-13 21:03:42,908 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 1636 selfloop transitions, 2051 changer transitions 48/3735 dead transitions. [2025-04-13 21:03:42,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1311 places, 3735 transitions, 152883 flow [2025-04-13 21:03:42,908 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-04-13 21:03:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2025-04-13 21:03:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 407 transitions. [2025-04-13 21:03:42,909 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.254375 [2025-04-13 21:03:42,909 INFO L175 Difference]: Start difference. First operand has 1253 places, 3425 transitions, 136987 flow. Second operand 64 states and 407 transitions. [2025-04-13 21:03:42,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1311 places, 3735 transitions, 152883 flow [2025-04-13 21:04:53,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1286 places, 3735 transitions, 148916 flow, removed 1796 selfloop flow, removed 25 redundant places. [2025-04-13 21:04:53,111 INFO L231 Difference]: Finished difference. Result has 1304 places, 3525 transitions, 143552 flow [2025-04-13 21:04:53,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=134431, PETRI_DIFFERENCE_MINUEND_PLACES=1223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=143552, PETRI_PLACES=1304, PETRI_TRANSITIONS=3525} [2025-04-13 21:04:53,114 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1280 predicate places. [2025-04-13 21:04:53,114 INFO L485 AbstractCegarLoop]: Abstraction has has 1304 places, 3525 transitions, 143552 flow [2025-04-13 21:04:53,114 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 21:04:53,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:04:53,114 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:04:53,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-04-13 21:04:53,315 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:04:53,315 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:04:53,316 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:04:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash -937110310, now seen corresponding path program 21 times [2025-04-13 21:04:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:04:53,316 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679199531] [2025-04-13 21:04:53,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 21:04:53,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:04:53,322 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 21:04:53,328 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:04:53,328 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 21:04:53,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:04:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:04:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:04:53,750 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679199531] [2025-04-13 21:04:53,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679199531] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:04:53,750 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087820049] [2025-04-13 21:04:53,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 21:04:53,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:04:53,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:04:53,752 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 21:04:53,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-04-13 21:04:53,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 21:04:53,832 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:04:53,832 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 21:04:53,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:04:53,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-04-13 21:04:53,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:04:54,175 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 21:04:54,175 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2025-04-13 21:04:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:04:54,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:04:54,549 INFO L325 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2025-04-13 21:04:54,549 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 51 treesize of output 43 [2025-04-13 21:04:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:04:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087820049] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:04:54,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:04:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 46 [2025-04-13 21:04:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040260287] [2025-04-13 21:04:54,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:04:54,784 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-04-13 21:04:54,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:04:54,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-04-13 21:04:54,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2025-04-13 21:04:54,785 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 21:04:54,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1304 places, 3525 transitions, 143552 flow. Second operand has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 21:04:54,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:04:54,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 21:04:54,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:05:22,496 INFO L116 PetriNetUnfolderBase]: 13547/24332 cut-off events. [2025-04-13 21:05:22,496 INFO L117 PetriNetUnfolderBase]: For 2623873/2623873 co-relation queries the response was YES. [2025-04-13 21:05:22,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393058 conditions, 24332 events. 13547/24332 cut-off events. For 2623873/2623873 co-relation queries the response was YES. Maximal size of possible extension queue 1469. Compared 209944 event pairs, 658 based on Foata normal form. 4/24274 useless extension candidates. Maximal degree in co-relation 392706. Up to 12115 conditions per place. [2025-04-13 21:05:23,101 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 1584 selfloop transitions, 2073 changer transitions 49/3706 dead transitions. [2025-04-13 21:05:23,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1345 places, 3706 transitions, 153431 flow [2025-04-13 21:05:23,101 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-04-13 21:05:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2025-04-13 21:05:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 354 transitions. [2025-04-13 21:05:23,102 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25745454545454544 [2025-04-13 21:05:23,102 INFO L175 Difference]: Start difference. First operand has 1304 places, 3525 transitions, 143552 flow. Second operand 55 states and 354 transitions. [2025-04-13 21:05:23,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1345 places, 3706 transitions, 153431 flow [2025-04-13 21:06:20,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1319 places, 3706 transitions, 153062 flow, removed 109 selfloop flow, removed 26 redundant places. [2025-04-13 21:06:21,002 INFO L231 Difference]: Finished difference. Result has 1329 places, 3538 transitions, 148106 flow [2025-04-13 21:06:21,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=143214, PETRI_DIFFERENCE_MINUEND_PLACES=1265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2050, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=148106, PETRI_PLACES=1329, PETRI_TRANSITIONS=3538} [2025-04-13 21:06:21,005 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1305 predicate places. [2025-04-13 21:06:21,005 INFO L485 AbstractCegarLoop]: Abstraction has has 1329 places, 3538 transitions, 148106 flow [2025-04-13 21:06:21,006 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 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 21:06:21,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:06:21,006 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:06:21,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-04-13 21:06:21,206 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:06:21,206 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:06:21,207 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:06:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash 766612592, now seen corresponding path program 22 times [2025-04-13 21:06:21,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:06:21,207 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026199729] [2025-04-13 21:06:21,207 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 21:06:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:06:21,212 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 21:06:21,218 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:06:21,218 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 21:06:21,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:06:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:06:21,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:06:21,549 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026199729] [2025-04-13 21:06:21,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026199729] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 21:06:21,550 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182414132] [2025-04-13 21:06:21,550 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 21:06:21,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:06:21,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:06:21,552 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 21:06:21,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-04-13 21:06:21,601 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 21:06:21,615 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 21:06:21,615 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 21:06:21,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:06:21,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 21:06:21,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:06:21,967 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 21:06:21,968 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 7 [2025-04-13 21:06:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:06:22,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:06:22,312 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 21:06:22,312 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 51 treesize of output 53 [2025-04-13 21:06:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 21:06:22,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182414132] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 21:06:22,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 21:06:22,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2025-04-13 21:06:22,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985741299] [2025-04-13 21:06:22,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 21:06:22,520 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-04-13 21:06:22,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:06:22,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-04-13 21:06:22,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2025-04-13 21:06:22,521 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 21:06:22,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1329 places, 3538 transitions, 148106 flow. Second operand has 47 states, 47 states have (on average 3.617021276595745) internal successors, (170), 47 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 21:06:22,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:06:22,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 21:06:22,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2025-04-13 21:06:50,101 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 21:06:50,102 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 21:06:50,486 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2025-04-13 21:06:50,488 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 21:06:50,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-04-13 21:06:50,688 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:06:50,688 WARN L610 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 2/25 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 368360 conditions, 22423 events (12348/22422 cut-off events. For 2504372/2504372 co-relation queries the response was YES. Maximal size of possible extension queue 1707. Compared 208817 event pairs, 599 based on Foata normal form. 124/23563 useless extension candidates. Maximal degree in co-relation 367998. Up to 8525 conditions per place.). [2025-04-13 21:06:50,690 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 21:06:50,690 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 21:06:50,690 INFO L422 BasicCegarLoop]: Path program histogram: [22, 6, 2, 1, 1, 1, 1] [2025-04-13 21:06:50,693 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 21:06:50,693 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 21:06:50,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 09:06:50 BasicIcfg [2025-04-13 21:06:50,695 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 21:06:50,695 INFO L158 Benchmark]: Toolchain (without parser) took 789671.94ms. Allocated memory was 142.6MB in the beginning and 3.7GB in the end (delta: 3.6GB). Free memory was 100.7MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2025-04-13 21:06:50,696 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 159.4MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 21:06:50,696 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.16ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 85.7MB in the end (delta: 15.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2025-04-13 21:06:50,696 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.41ms. Allocated memory is still 142.6MB. Free memory was 85.7MB in the beginning and 83.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 21:06:50,696 INFO L158 Benchmark]: Boogie Preprocessor took 36.57ms. Allocated memory is still 142.6MB. Free memory was 83.7MB in the beginning and 81.5MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 21:06:50,696 INFO L158 Benchmark]: RCFGBuilder took 464.10ms. Allocated memory is still 142.6MB. Free memory was 81.5MB in the beginning and 32.0MB in the end (delta: 49.6MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. [2025-04-13 21:06:50,696 INFO L158 Benchmark]: TraceAbstraction took 788887.07ms. Allocated memory was 142.6MB in the beginning and 3.7GB in the end (delta: 3.6GB). Free memory was 31.2MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 3.1GB. Max. memory is 8.0GB. [2025-04-13 21:06:50,699 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 159.4MB. Free memory is still 87.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 249.16ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 85.7MB in the end (delta: 15.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.41ms. Allocated memory is still 142.6MB. Free memory was 85.7MB in the beginning and 83.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 36.57ms. Allocated memory is still 142.6MB. Free memory was 83.7MB in the beginning and 81.5MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 464.10ms. Allocated memory is still 142.6MB. Free memory was 81.5MB in the beginning and 32.0MB in the end (delta: 49.6MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. * TraceAbstraction took 788887.07ms. Allocated memory was 142.6MB in the beginning and 3.7GB in the end (delta: 3.6GB). Free memory was 31.2MB in the beginning and 1.2GB in the end (delta: -1.2GB). Peak memory consumption was 3.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 2/25 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 368360 conditions, 22423 events (12348/22422 cut-off events. For 2504372/2504372 co-relation queries the response was YES. Maximal size of possible extension queue 1707. Compared 208817 event pairs, 599 based on Foata normal form. 124/23563 useless extension candidates. Maximal degree in co-relation 367998. Up to 8525 conditions per place.). - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 2/25 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 368360 conditions, 22423 events (12348/22422 cut-off events. For 2504372/2504372 co-relation queries the response was YES. Maximal size of possible extension queue 1707. Compared 208817 event pairs, 599 based on Foata normal form. 124/23563 useless extension candidates. Maximal degree in co-relation 367998. Up to 8525 conditions per place.). - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (47states, 2/25 universal loopers) in iteration 34,while PetriNetUnfolder was constructing finite prefix that currently has 368360 conditions, 22423 events (12348/22422 cut-off events. For 2504372/2504372 co-relation queries the response was YES. Maximal size of possible extension queue 1707. Compared 208817 event pairs, 599 based on Foata normal form. 124/23563 useless extension candidates. Maximal degree in co-relation 367998. Up to 8525 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 33 locations, 41 edges, 3 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: 788.8s, OverallIterations: 34, TraceHistogramMax: 4, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 744.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 8527 SdHoareTripleChecker+Valid, 35.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8527 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 31.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4880 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 64722 IncrementalHoareTripleChecker+Invalid, 69604 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4880 mSolverCounterUnsat, 0 mSDtfsCounter, 64722 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3289 GetRequests, 749 SyntacticMatches, 2 SemanticMatches, 2538 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84721 ImplicationChecksByTransitivity, 87.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=148106occurred in iteration=33, InterpolantAutomatonStates: 1800, 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: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 35.5s InterpolantComputationTime, 1506 NumberOfCodeBlocks, 1488 NumberOfCodeBlocksAsserted, 125 NumberOfCheckSat, 2126 ConstructedInterpolants, 43 QuantifiedInterpolants, 37182 SizeOfPredicates, 341 NumberOfNonLiveVariables, 5257 ConjunctsInSsa, 1050 ConjunctsInUnsatCore, 92 InterpolantComputations, 5 PerfectInterpolantSequences, 134/820 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