/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-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:22:01,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:22:01,220 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 20:22:01,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:22:01,223 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:22:01,245 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:22:01,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:22:01,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:22:01,246 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:22:01,246 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:22:01,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:22:01,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:22:01,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:22:01,246 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:22:01,246 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:22:01,247 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:22:01,247 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:22:01,247 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:22:01,248 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:22:01,248 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:22:01,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:22:01,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:22:01,248 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:22:01,249 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:22:01,249 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:22:01,249 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 20:22:01,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:22:01,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:22:01,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:22:01,457 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:22:01,458 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:22:01,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2025-04-13 20:22:02,771 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9a475f37/073f731ce5bf46c1bad10ab6591be8c4/FLAG5f5137275 [2025-04-13 20:22:02,958 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:22:02,958 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2025-04-13 20:22:02,963 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9a475f37/073f731ce5bf46c1bad10ab6591be8c4/FLAG5f5137275 [2025-04-13 20:22:03,773 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9a475f37/073f731ce5bf46c1bad10ab6591be8c4 [2025-04-13 20:22:03,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:22:03,776 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:22:03,777 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:22:03,777 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:22:03,783 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:22:03,784 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:22:03" (1/1) ... [2025-04-13 20:22:03,784 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2272a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:03, skipping insertion in model container [2025-04-13 20:22:03,784 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:22:03" (1/1) ... [2025-04-13 20:22:03,798 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:22:03,957 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-bad-counter-queue2.wvr.c[2297,2310] [2025-04-13 20:22:03,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:22:03,985 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:22:04,012 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-bad-counter-queue2.wvr.c[2297,2310] [2025-04-13 20:22:04,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:22:04,034 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:22:04,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04 WrapperNode [2025-04-13 20:22:04,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:22:04,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:22:04,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:22:04,035 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:22:04,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,074 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 123 [2025-04-13 20:22:04,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:22:04,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:22:04,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:22:04,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:22:04,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,088 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,103 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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 20:22:04,104 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,110 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,116 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,124 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:22:04,124 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:22:04,124 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:22:04,125 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:22:04,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (1/1) ... [2025-04-13 20:22:04,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:22:04,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:04,147 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 20:22:04,149 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 20:22:04,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:22:04,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:22:04,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:22:04,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 20:22:04,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 20:22:04,167 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 20:22:04,242 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:22:04,244 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:22:04,416 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:22:04,417 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:22:04,417 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:22:04,591 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 20:22:04,594 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 20:22:04,597 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:22:04,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:22:04 BoogieIcfgContainer [2025-04-13 20:22:04,598 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:22:04,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:22:04,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:22:04,603 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:22:04,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:22:03" (1/3) ... [2025-04-13 20:22:04,603 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a4c280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:22:04, skipping insertion in model container [2025-04-13 20:22:04,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:22:04" (2/3) ... [2025-04-13 20:22:04,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a4c280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:22:04, skipping insertion in model container [2025-04-13 20:22:04,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:22:04" (3/3) ... [2025-04-13 20:22:04,604 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2025-04-13 20:22:04,613 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:22:04,615 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue2.wvr.c that has 3 procedures, 19 locations, 21 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 20:22:04,615 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:22:04,650 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 20:22:04,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 23 transitions, 60 flow [2025-04-13 20:22:04,696 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 20:22:04,698 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:22:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 5/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2025-04-13 20:22:04,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 23 transitions, 60 flow [2025-04-13 20:22:04,715 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 52 flow [2025-04-13 20:22:04,721 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:22:04,729 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;@3cbc87c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:22:04,730 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 20:22:04,740 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:22:04,741 INFO L116 PetriNetUnfolderBase]: 5/19 cut-off events. [2025-04-13 20:22:04,741 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:22:04,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:04,741 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:04,742 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 20:22:04,745 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash 82665567, now seen corresponding path program 1 times [2025-04-13 20:22:04,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:04,750 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476543063] [2025-04-13 20:22:04,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:04,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 20:22:04,835 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 20:22:04,836 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:04,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:04,940 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 20:22:04,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:04,941 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476543063] [2025-04-13 20:22:04,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476543063] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:04,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:04,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 20:22:04,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680171562] [2025-04-13 20:22:04,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:04,948 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:22:04,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:04,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:22:04,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:22:04,966 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:04,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 20:22:04,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:04,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:04,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:05,057 INFO L116 PetriNetUnfolderBase]: 106/178 cut-off events. [2025-04-13 20:22:05,058 INFO L117 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-04-13 20:22:05,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 178 events. 106/178 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 530 event pairs, 22 based on Foata normal form. 1/131 useless extension candidates. Maximal degree in co-relation 324. Up to 126 conditions per place. [2025-04-13 20:22:05,061 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 27 selfloop transitions, 3 changer transitions 1/31 dead transitions. [2025-04-13 20:22:05,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 31 transitions, 145 flow [2025-04-13 20:22:05,063 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:22:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:22:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2025-04-13 20:22:05,071 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2025-04-13 20:22:05,072 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 52 flow. Second operand 3 states and 38 transitions. [2025-04-13 20:22:05,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 31 transitions, 145 flow [2025-04-13 20:22:05,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 20:22:05,078 INFO L231 Difference]: Finished difference. Result has 21 places, 22 transitions, 63 flow [2025-04-13 20:22:05,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=21, PETRI_TRANSITIONS=22} [2025-04-13 20:22:05,082 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2025-04-13 20:22:05,082 INFO L485 AbstractCegarLoop]: Abstraction has has 21 places, 22 transitions, 63 flow [2025-04-13 20:22:05,082 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 20:22:05,082 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:05,082 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:05,082 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:22:05,082 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 20:22:05,083 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:05,083 INFO L85 PathProgramCache]: Analyzing trace with hash 916791714, now seen corresponding path program 1 times [2025-04-13 20:22:05,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:05,083 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938759891] [2025-04-13 20:22:05,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:05,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:05,098 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-13 20:22:05,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-13 20:22:05,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:05,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:05,192 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 20:22:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:05,193 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938759891] [2025-04-13 20:22:05,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938759891] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:05,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:05,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:22:05,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559191534] [2025-04-13 20:22:05,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:05,194 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:22:05,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:05,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:22:05,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:22:05,194 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:05,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 22 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 20:22:05,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:05,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:05,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:05,259 INFO L116 PetriNetUnfolderBase]: 137/225 cut-off events. [2025-04-13 20:22:05,259 INFO L117 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-04-13 20:22:05,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 225 events. 137/225 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 724 event pairs, 51 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 155. Up to 166 conditions per place. [2025-04-13 20:22:05,261 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 30 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2025-04-13 20:22:05,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 33 transitions, 159 flow [2025-04-13 20:22:05,261 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:22:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:22:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2025-04-13 20:22:05,262 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2025-04-13 20:22:05,262 INFO L175 Difference]: Start difference. First operand has 21 places, 22 transitions, 63 flow. Second operand 3 states and 37 transitions. [2025-04-13 20:22:05,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 33 transitions, 159 flow [2025-04-13 20:22:05,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 33 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:22:05,263 INFO L231 Difference]: Finished difference. Result has 23 places, 24 transitions, 79 flow [2025-04-13 20:22:05,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=23, PETRI_TRANSITIONS=24} [2025-04-13 20:22:05,264 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2025-04-13 20:22:05,264 INFO L485 AbstractCegarLoop]: Abstraction has has 23 places, 24 transitions, 79 flow [2025-04-13 20:22:05,264 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 20:22:05,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:05,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:05,264 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:22:05,264 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 20:22:05,264 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash -626341598, now seen corresponding path program 2 times [2025-04-13 20:22:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:05,264 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657969969] [2025-04-13 20:22:05,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:05,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:05,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 1 equivalence classes. [2025-04-13 20:22:05,277 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-13 20:22:05,277 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:22:05,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:05,340 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 20:22:05,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:05,340 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657969969] [2025-04-13 20:22:05,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657969969] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:05,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:05,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:22:05,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366085373] [2025-04-13 20:22:05,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:05,340 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:22:05,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:05,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:22:05,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:22:05,341 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:05,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 24 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 20:22:05,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:05,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:05,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:05,424 INFO L116 PetriNetUnfolderBase]: 122/210 cut-off events. [2025-04-13 20:22:05,424 INFO L117 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2025-04-13 20:22:05,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 210 events. 122/210 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 674 event pairs, 10 based on Foata normal form. 15/191 useless extension candidates. Maximal degree in co-relation 164. Up to 124 conditions per place. [2025-04-13 20:22:05,440 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 34 selfloop transitions, 5 changer transitions 1/40 dead transitions. [2025-04-13 20:22:05,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 204 flow [2025-04-13 20:22:05,441 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:22:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:22:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2025-04-13 20:22:05,441 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5108695652173914 [2025-04-13 20:22:05,441 INFO L175 Difference]: Start difference. First operand has 23 places, 24 transitions, 79 flow. Second operand 4 states and 47 transitions. [2025-04-13 20:22:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 204 flow [2025-04-13 20:22:05,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 40 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:22:05,443 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 104 flow [2025-04-13 20:22:05,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2025-04-13 20:22:05,443 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2025-04-13 20:22:05,443 INFO L485 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 104 flow [2025-04-13 20:22:05,443 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 20:22:05,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:05,443 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:05,443 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:22:05,444 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 20:22:05,444 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash 952166548, now seen corresponding path program 1 times [2025-04-13 20:22:05,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:05,444 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540196253] [2025-04-13 20:22:05,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:05,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:05,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-13 20:22:05,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-13 20:22:05,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:05,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:05,490 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 20:22:05,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:05,490 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540196253] [2025-04-13 20:22:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540196253] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:05,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:05,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:22:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403098337] [2025-04-13 20:22:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:05,491 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:22:05,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:05,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:22:05,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:22:05,491 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:05,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 20:22:05,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:05,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:05,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:05,548 INFO L116 PetriNetUnfolderBase]: 114/197 cut-off events. [2025-04-13 20:22:05,548 INFO L117 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2025-04-13 20:22:05,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 197 events. 114/197 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 557 event pairs, 59 based on Foata normal form. 5/168 useless extension candidates. Maximal degree in co-relation 147. Up to 179 conditions per place. [2025-04-13 20:22:05,550 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 24 selfloop transitions, 0 changer transitions 9/33 dead transitions. [2025-04-13 20:22:05,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 193 flow [2025-04-13 20:22:05,550 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:22:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:22:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2025-04-13 20:22:05,551 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2025-04-13 20:22:05,551 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 104 flow. Second operand 3 states and 35 transitions. [2025-04-13 20:22:05,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 193 flow [2025-04-13 20:22:05,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:22:05,552 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 94 flow [2025-04-13 20:22:05,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2025-04-13 20:22:05,553 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2025-04-13 20:22:05,553 INFO L485 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 94 flow [2025-04-13 20:22:05,553 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 20:22:05,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:05,553 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:05,553 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:22:05,553 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 20:22:05,554 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1500121129, now seen corresponding path program 1 times [2025-04-13 20:22:05,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:05,554 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832772661] [2025-04-13 20:22:05,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:05,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:05,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-13 20:22:05,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 20:22:05,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:05,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:05,657 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 20:22:05,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:05,658 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832772661] [2025-04-13 20:22:05,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832772661] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:05,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:05,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:22:05,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64863449] [2025-04-13 20:22:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:05,658 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:22:05,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:05,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:22:05,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:22:05,659 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:05,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 94 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 20:22:05,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:05,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:05,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:05,727 INFO L116 PetriNetUnfolderBase]: 106/184 cut-off events. [2025-04-13 20:22:05,727 INFO L117 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2025-04-13 20:22:05,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 184 events. 106/184 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 477 event pairs, 58 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 523. Up to 179 conditions per place. [2025-04-13 20:22:05,729 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 23 selfloop transitions, 2 changer transitions 5/30 dead transitions. [2025-04-13 20:22:05,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 30 transitions, 168 flow [2025-04-13 20:22:05,730 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:22:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:22:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2025-04-13 20:22:05,730 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2025-04-13 20:22:05,731 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 94 flow. Second operand 4 states and 34 transitions. [2025-04-13 20:22:05,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 30 transitions, 168 flow [2025-04-13 20:22:05,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 158 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-13 20:22:05,732 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 100 flow [2025-04-13 20:22:05,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2025-04-13 20:22:05,732 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2025-04-13 20:22:05,732 INFO L485 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 100 flow [2025-04-13 20:22:05,732 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 20:22:05,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:05,733 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:05,733 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 20:22:05,733 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 20:22:05,733 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:05,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1017693395, now seen corresponding path program 1 times [2025-04-13 20:22:05,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:05,733 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070976459] [2025-04-13 20:22:05,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:05,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:05,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:22:05,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:22:05,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:05,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:06,162 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 20:22:06,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:06,163 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070976459] [2025-04-13 20:22:06,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070976459] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:06,163 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926451726] [2025-04-13 20:22:06,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:06,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:06,166 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 20:22:06,167 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 20:22:06,209 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:22:06,227 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:22:06,227 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:06,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:06,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-13 20:22:06,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:06,306 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 20:22:06,307 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:22:06,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926451726] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:06,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:22:06,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2025-04-13 20:22:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907256714] [2025-04-13 20:22:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:06,308 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:22:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:06,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:22:06,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:22:06,308 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:06,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 20:22:06,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:06,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:06,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:06,424 INFO L116 PetriNetUnfolderBase]: 163/281 cut-off events. [2025-04-13 20:22:06,424 INFO L117 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2025-04-13 20:22:06,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 281 events. 163/281 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 957 event pairs, 10 based on Foata normal form. 1/231 useless extension candidates. Maximal degree in co-relation 793. Up to 166 conditions per place. [2025-04-13 20:22:06,427 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 43 selfloop transitions, 13 changer transitions 1/57 dead transitions. [2025-04-13 20:22:06,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 57 transitions, 324 flow [2025-04-13 20:22:06,427 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:22:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:22:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2025-04-13 20:22:06,428 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47101449275362317 [2025-04-13 20:22:06,428 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 100 flow. Second operand 6 states and 65 transitions. [2025-04-13 20:22:06,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 57 transitions, 324 flow [2025-04-13 20:22:06,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 316 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-13 20:22:06,429 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 176 flow [2025-04-13 20:22:06,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2025-04-13 20:22:06,430 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2025-04-13 20:22:06,430 INFO L485 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 176 flow [2025-04-13 20:22:06,430 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 20:22:06,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:06,430 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:06,437 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 20:22:06,634 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-04-13 20:22:06,634 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 20:22:06,635 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:06,635 INFO L85 PathProgramCache]: Analyzing trace with hash -881098437, now seen corresponding path program 2 times [2025-04-13 20:22:06,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:06,635 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624030598] [2025-04-13 20:22:06,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:06,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:06,641 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:22:06,647 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 16 statements. [2025-04-13 20:22:06,647 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:22:06,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:06,861 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 20:22:06,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:06,861 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624030598] [2025-04-13 20:22:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624030598] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:06,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:06,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:22:06,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586566666] [2025-04-13 20:22:06,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:06,862 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-13 20:22:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:06,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-13 20:22:06,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-04-13 20:22:06,863 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:06,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 176 flow. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:06,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:06,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:06,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:07,004 INFO L116 PetriNetUnfolderBase]: 206/355 cut-off events. [2025-04-13 20:22:07,005 INFO L117 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2025-04-13 20:22:07,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 355 events. 206/355 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1305 event pairs, 41 based on Foata normal form. 1/290 useless extension candidates. Maximal degree in co-relation 1171. Up to 276 conditions per place. [2025-04-13 20:22:07,007 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 40 selfloop transitions, 24 changer transitions 1/65 dead transitions. [2025-04-13 20:22:07,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 431 flow [2025-04-13 20:22:07,007 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:22:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:22:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2025-04-13 20:22:07,010 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.375 [2025-04-13 20:22:07,010 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 176 flow. Second operand 8 states and 69 transitions. [2025-04-13 20:22:07,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 431 flow [2025-04-13 20:22:07,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 405 flow, removed 13 selfloop flow, removed 0 redundant places. [2025-04-13 20:22:07,014 INFO L231 Difference]: Finished difference. Result has 46 places, 51 transitions, 343 flow [2025-04-13 20:22:07,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=343, PETRI_PLACES=46, PETRI_TRANSITIONS=51} [2025-04-13 20:22:07,015 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2025-04-13 20:22:07,016 INFO L485 AbstractCegarLoop]: Abstraction has has 46 places, 51 transitions, 343 flow [2025-04-13 20:22:07,016 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:07,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:07,016 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:07,016 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-13 20:22:07,016 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 20:22:07,016 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash -606568393, now seen corresponding path program 3 times [2025-04-13 20:22:07,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:07,017 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421322009] [2025-04-13 20:22:07,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:22:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:07,025 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:22:07,035 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 15 of 16 statements. [2025-04-13 20:22:07,035 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:22:07,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:07,219 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 20:22:07,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:07,220 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421322009] [2025-04-13 20:22:07,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421322009] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:07,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:07,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-04-13 20:22:07,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105618415] [2025-04-13 20:22:07,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:07,220 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-13 20:22:07,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:07,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-13 20:22:07,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-04-13 20:22:07,221 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:07,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 51 transitions, 343 flow. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 20:22:07,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:07,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:07,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:07,378 INFO L116 PetriNetUnfolderBase]: 245/422 cut-off events. [2025-04-13 20:22:07,378 INFO L117 PetriNetUnfolderBase]: For 427/427 co-relation queries the response was YES. [2025-04-13 20:22:07,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1600 conditions, 422 events. 245/422 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1643 event pairs, 49 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 1585. Up to 345 conditions per place. [2025-04-13 20:22:07,381 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 53 selfloop transitions, 24 changer transitions 1/78 dead transitions. [2025-04-13 20:22:07,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 78 transitions, 613 flow [2025-04-13 20:22:07,382 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:22:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:22:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 68 transitions. [2025-04-13 20:22:07,383 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3695652173913043 [2025-04-13 20:22:07,383 INFO L175 Difference]: Start difference. First operand has 46 places, 51 transitions, 343 flow. Second operand 8 states and 68 transitions. [2025-04-13 20:22:07,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 78 transitions, 613 flow [2025-04-13 20:22:07,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 78 transitions, 607 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-04-13 20:22:07,387 INFO L231 Difference]: Finished difference. Result has 55 places, 65 transitions, 505 flow [2025-04-13 20:22:07,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=505, PETRI_PLACES=55, PETRI_TRANSITIONS=65} [2025-04-13 20:22:07,389 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 33 predicate places. [2025-04-13 20:22:07,389 INFO L485 AbstractCegarLoop]: Abstraction has has 55 places, 65 transitions, 505 flow [2025-04-13 20:22:07,389 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 20:22:07,389 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:07,389 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:07,389 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-13 20:22:07,390 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 20:22:07,390 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:07,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1458953503, now seen corresponding path program 4 times [2025-04-13 20:22:07,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:07,391 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618833201] [2025-04-13 20:22:07,391 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:07,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:07,397 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:22:07,403 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:22:07,403 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:22:07,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:07,680 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 20:22:07,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:07,680 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618833201] [2025-04-13 20:22:07,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618833201] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:07,680 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797438840] [2025-04-13 20:22:07,680 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:07,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:07,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:07,682 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 20:22:07,683 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 20:22:07,722 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:22:07,738 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:22:07,739 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:22:07,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:07,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-13 20:22:07,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:07,801 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 20:22:07,802 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:22:07,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797438840] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:07,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:22:07,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2025-04-13 20:22:07,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413010244] [2025-04-13 20:22:07,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:07,803 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:22:07,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:07,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:22:07,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:22:07,804 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:07,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 65 transitions, 505 flow. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 20:22:07,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:07,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:07,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:07,922 INFO L116 PetriNetUnfolderBase]: 275/474 cut-off events. [2025-04-13 20:22:07,922 INFO L117 PetriNetUnfolderBase]: For 861/861 co-relation queries the response was YES. [2025-04-13 20:22:07,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 474 events. 275/474 cut-off events. For 861/861 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1909 event pairs, 52 based on Foata normal form. 1/382 useless extension candidates. Maximal degree in co-relation 2105. Up to 395 conditions per place. [2025-04-13 20:22:07,926 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 70 selfloop transitions, 17 changer transitions 1/88 dead transitions. [2025-04-13 20:22:07,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 88 transitions, 819 flow [2025-04-13 20:22:07,927 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:22:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:22:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2025-04-13 20:22:07,927 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2025-04-13 20:22:07,927 INFO L175 Difference]: Start difference. First operand has 55 places, 65 transitions, 505 flow. Second operand 6 states and 60 transitions. [2025-04-13 20:22:07,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 88 transitions, 819 flow [2025-04-13 20:22:07,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 88 transitions, 801 flow, removed 8 selfloop flow, removed 1 redundant places. [2025-04-13 20:22:07,935 INFO L231 Difference]: Finished difference. Result has 62 places, 72 transitions, 613 flow [2025-04-13 20:22:07,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=62, PETRI_TRANSITIONS=72} [2025-04-13 20:22:07,935 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 40 predicate places. [2025-04-13 20:22:07,935 INFO L485 AbstractCegarLoop]: Abstraction has has 62 places, 72 transitions, 613 flow [2025-04-13 20:22:07,936 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 20:22:07,936 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:07,936 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:07,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:08,137 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,SelfDestructingSolverStorable8 [2025-04-13 20:22:08,137 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 20:22:08,138 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -345907739, now seen corresponding path program 5 times [2025-04-13 20:22:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:08,138 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010169343] [2025-04-13 20:22:08,138 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:08,144 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:22:08,155 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:22:08,155 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:08,155 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:08,478 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 20:22:08,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:08,479 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010169343] [2025-04-13 20:22:08,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010169343] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:08,479 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119104011] [2025-04-13 20:22:08,479 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:08,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:08,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:08,481 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 20:22:08,482 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 20:22:08,521 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:22:08,536 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:22:08,536 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:08,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:08,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-13 20:22:08,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:08,593 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 20:22:08,594 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:22:08,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119104011] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:08,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:22:08,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2025-04-13 20:22:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645995931] [2025-04-13 20:22:08,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:08,594 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:22:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:08,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:22:08,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:22:08,595 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:08,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 72 transitions, 613 flow. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 20:22:08,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:08,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:08,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:08,738 INFO L116 PetriNetUnfolderBase]: 332/571 cut-off events. [2025-04-13 20:22:08,738 INFO L117 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2025-04-13 20:22:08,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2792 conditions, 571 events. 332/571 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2454 event pairs, 55 based on Foata normal form. 1/460 useless extension candidates. Maximal degree in co-relation 2769. Up to 463 conditions per place. [2025-04-13 20:22:08,742 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 75 selfloop transitions, 19 changer transitions 1/95 dead transitions. [2025-04-13 20:22:08,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 95 transitions, 967 flow [2025-04-13 20:22:08,742 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:22:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:22:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2025-04-13 20:22:08,743 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.427536231884058 [2025-04-13 20:22:08,743 INFO L175 Difference]: Start difference. First operand has 62 places, 72 transitions, 613 flow. Second operand 6 states and 59 transitions. [2025-04-13 20:22:08,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 95 transitions, 967 flow [2025-04-13 20:22:08,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 961 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-04-13 20:22:08,749 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 736 flow [2025-04-13 20:22:08,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2025-04-13 20:22:08,750 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 47 predicate places. [2025-04-13 20:22:08,750 INFO L485 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 736 flow [2025-04-13 20:22:08,750 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 20:22:08,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:08,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:08,757 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 20:22:08,951 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:08,951 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 20:22:08,951 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1178023199, now seen corresponding path program 6 times [2025-04-13 20:22:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:08,952 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557880099] [2025-04-13 20:22:08,952 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:08,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:08,959 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:22:08,967 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 15 of 16 statements. [2025-04-13 20:22:08,967 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-04-13 20:22:08,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:09,156 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 20:22:09,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:09,156 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557880099] [2025-04-13 20:22:09,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557880099] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:09,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:09,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-04-13 20:22:09,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504272524] [2025-04-13 20:22:09,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:09,157 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-13 20:22:09,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:09,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-13 20:22:09,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-04-13 20:22:09,158 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:09,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 736 flow. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 20:22:09,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:09,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:09,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:09,359 INFO L116 PetriNetUnfolderBase]: 362/623 cut-off events. [2025-04-13 20:22:09,360 INFO L117 PetriNetUnfolderBase]: For 1925/1925 co-relation queries the response was YES. [2025-04-13 20:22:09,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3197 conditions, 623 events. 362/623 cut-off events. For 1925/1925 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 2733 event pairs, 79 based on Foata normal form. 1/499 useless extension candidates. Maximal degree in co-relation 3171. Up to 492 conditions per place. [2025-04-13 20:22:09,364 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 64 selfloop transitions, 44 changer transitions 1/109 dead transitions. [2025-04-13 20:22:09,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 109 transitions, 1164 flow [2025-04-13 20:22:09,365 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 20:22:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 20:22:09,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2025-04-13 20:22:09,367 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36231884057971014 [2025-04-13 20:22:09,367 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 736 flow. Second operand 9 states and 75 transitions. [2025-04-13 20:22:09,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 109 transitions, 1164 flow [2025-04-13 20:22:09,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 109 transitions, 1115 flow, removed 21 selfloop flow, removed 1 redundant places. [2025-04-13 20:22:09,378 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 991 flow [2025-04-13 20:22:09,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=991, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2025-04-13 20:22:09,378 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 56 predicate places. [2025-04-13 20:22:09,379 INFO L485 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 991 flow [2025-04-13 20:22:09,379 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 20:22:09,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:09,379 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 20:22:09,379 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-04-13 20:22:09,379 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 20:22:09,380 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash 500855422, now seen corresponding path program 1 times [2025-04-13 20:22:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:09,380 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632187562] [2025-04-13 20:22:09,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:09,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:22:09,393 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:09,393 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:09,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:09,429 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632187562] [2025-04-13 20:22:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632187562] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:09,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:09,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:22:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429249623] [2025-04-13 20:22:09,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:09,429 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:22:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:09,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:22:09,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:22:09,430 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:09,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 991 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 20:22:09,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:09,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:09,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:09,556 INFO L116 PetriNetUnfolderBase]: 372/650 cut-off events. [2025-04-13 20:22:09,556 INFO L117 PetriNetUnfolderBase]: For 2358/2358 co-relation queries the response was YES. [2025-04-13 20:22:09,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3589 conditions, 650 events. 372/650 cut-off events. For 2358/2358 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2992 event pairs, 73 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 3560. Up to 280 conditions per place. [2025-04-13 20:22:09,562 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 109 selfloop transitions, 20 changer transitions 9/138 dead transitions. [2025-04-13 20:22:09,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 138 transitions, 1626 flow [2025-04-13 20:22:09,567 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:22:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:22:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2025-04-13 20:22:09,567 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4608695652173913 [2025-04-13 20:22:09,567 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 991 flow. Second operand 5 states and 53 transitions. [2025-04-13 20:22:09,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 138 transitions, 1626 flow [2025-04-13 20:22:09,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 138 transitions, 1570 flow, removed 27 selfloop flow, removed 1 redundant places. [2025-04-13 20:22:09,579 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 1011 flow [2025-04-13 20:22:09,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1011, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2025-04-13 20:22:09,580 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 61 predicate places. [2025-04-13 20:22:09,581 INFO L485 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 1011 flow [2025-04-13 20:22:09,581 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 20:22:09,581 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:09,581 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 20:22:09,581 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-04-13 20:22:09,581 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 20:22:09,582 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1261773310, now seen corresponding path program 2 times [2025-04-13 20:22:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:09,582 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037302104] [2025-04-13 20:22:09,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:09,588 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:09,592 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:09,592 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:09,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:09,642 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037302104] [2025-04-13 20:22:09,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037302104] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:09,642 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936843860] [2025-04-13 20:22:09,642 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:09,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:09,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:09,644 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 20:22:09,645 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 20:22:09,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:09,704 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:09,704 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:09,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:09,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 20:22:09,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:09,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:09,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936843860] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:09,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:09,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-04-13 20:22:09,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548159917] [2025-04-13 20:22:09,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:09,765 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-13 20:22:09,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:09,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-13 20:22:09,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-04-13 20:22:09,765 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:09,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 1011 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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 20:22:09,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:09,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:09,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:09,911 INFO L116 PetriNetUnfolderBase]: 377/661 cut-off events. [2025-04-13 20:22:09,911 INFO L117 PetriNetUnfolderBase]: For 3257/3257 co-relation queries the response was YES. [2025-04-13 20:22:09,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 661 events. 377/661 cut-off events. For 3257/3257 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3066 event pairs, 108 based on Foata normal form. 12/593 useless extension candidates. Maximal degree in co-relation 3709. Up to 464 conditions per place. [2025-04-13 20:22:09,915 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 91 selfloop transitions, 35 changer transitions 2/128 dead transitions. [2025-04-13 20:22:09,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 128 transitions, 1585 flow [2025-04-13 20:22:09,915 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:22:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:22:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2025-04-13 20:22:09,916 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2025-04-13 20:22:09,916 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 1011 flow. Second operand 6 states and 58 transitions. [2025-04-13 20:22:09,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 128 transitions, 1585 flow [2025-04-13 20:22:09,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 128 transitions, 1526 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-04-13 20:22:09,926 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 1176 flow [2025-04-13 20:22:09,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1176, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2025-04-13 20:22:09,927 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 65 predicate places. [2025-04-13 20:22:09,927 INFO L485 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 1176 flow [2025-04-13 20:22:09,927 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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 20:22:09,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:09,927 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 20:22:09,933 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 20:22:10,128 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:10,128 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 20:22:10,128 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1049416532, now seen corresponding path program 1 times [2025-04-13 20:22:10,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:10,129 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266199838] [2025-04-13 20:22:10,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:10,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:10,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:22:10,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:10,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:10,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:10,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:10,183 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266199838] [2025-04-13 20:22:10,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266199838] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:10,183 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52227052] [2025-04-13 20:22:10,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:10,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:10,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:10,185 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 20:22:10,187 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 20:22:10,222 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:22:10,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:10,236 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:10,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:10,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-13 20:22:10,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:10,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:10,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52227052] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:10,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:10,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-04-13 20:22:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751830180] [2025-04-13 20:22:10,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:10,325 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-13 20:22:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:10,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-13 20:22:10,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-04-13 20:22:10,325 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:10,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 1176 flow. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 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 20:22:10,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:10,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:10,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:10,471 INFO L116 PetriNetUnfolderBase]: 573/1058 cut-off events. [2025-04-13 20:22:10,472 INFO L117 PetriNetUnfolderBase]: For 6541/6541 co-relation queries the response was YES. [2025-04-13 20:22:10,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6292 conditions, 1058 events. 573/1058 cut-off events. For 6541/6541 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5690 event pairs, 239 based on Foata normal form. 58/1070 useless extension candidates. Maximal degree in co-relation 6258. Up to 657 conditions per place. [2025-04-13 20:22:10,479 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 155 selfloop transitions, 15 changer transitions 19/189 dead transitions. [2025-04-13 20:22:10,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 189 transitions, 2491 flow [2025-04-13 20:22:10,479 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:22:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:22:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 55 transitions. [2025-04-13 20:22:10,480 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39855072463768115 [2025-04-13 20:22:10,480 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 1176 flow. Second operand 6 states and 55 transitions. [2025-04-13 20:22:10,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 189 transitions, 2491 flow [2025-04-13 20:22:10,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 189 transitions, 2415 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-13 20:22:10,496 INFO L231 Difference]: Finished difference. Result has 93 places, 117 transitions, 1402 flow [2025-04-13 20:22:10,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1402, PETRI_PLACES=93, PETRI_TRANSITIONS=117} [2025-04-13 20:22:10,498 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 71 predicate places. [2025-04-13 20:22:10,498 INFO L485 AbstractCegarLoop]: Abstraction has has 93 places, 117 transitions, 1402 flow [2025-04-13 20:22:10,498 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 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 20:22:10,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:10,498 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 20:22:10,504 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 20:22:10,702 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,SelfDestructingSolverStorable13 [2025-04-13 20:22:10,702 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 20:22:10,703 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -647093546, now seen corresponding path program 3 times [2025-04-13 20:22:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:10,703 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932143770] [2025-04-13 20:22:10,703 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:22:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:10,708 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:10,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 18 statements. [2025-04-13 20:22:10,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:22:10,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:10,744 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 20:22:10,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:10,744 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932143770] [2025-04-13 20:22:10,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932143770] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:10,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:10,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:22:10,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513196176] [2025-04-13 20:22:10,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:10,744 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:22:10,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:10,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:22:10,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:22:10,745 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:10,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 117 transitions, 1402 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 20:22:10,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:10,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:10,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:10,910 INFO L116 PetriNetUnfolderBase]: 543/1010 cut-off events. [2025-04-13 20:22:10,910 INFO L117 PetriNetUnfolderBase]: For 6411/6411 co-relation queries the response was YES. [2025-04-13 20:22:10,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6117 conditions, 1010 events. 543/1010 cut-off events. For 6411/6411 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5433 event pairs, 127 based on Foata normal form. 12/982 useless extension candidates. Maximal degree in co-relation 6080. Up to 563 conditions per place. [2025-04-13 20:22:10,916 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 94 selfloop transitions, 33 changer transitions 15/142 dead transitions. [2025-04-13 20:22:10,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 142 transitions, 1906 flow [2025-04-13 20:22:10,916 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:22:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:22:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2025-04-13 20:22:10,917 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2025-04-13 20:22:10,917 INFO L175 Difference]: Start difference. First operand has 93 places, 117 transitions, 1402 flow. Second operand 5 states and 50 transitions. [2025-04-13 20:22:10,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 142 transitions, 1906 flow [2025-04-13 20:22:10,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 142 transitions, 1896 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-13 20:22:10,931 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 1312 flow [2025-04-13 20:22:10,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1312, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2025-04-13 20:22:10,932 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 74 predicate places. [2025-04-13 20:22:10,932 INFO L485 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 1312 flow [2025-04-13 20:22:10,932 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 20:22:10,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:10,932 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 20:22:10,932 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-04-13 20:22:10,932 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 20:22:10,933 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash 124776762, now seen corresponding path program 4 times [2025-04-13 20:22:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:10,933 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604934987] [2025-04-13 20:22:10,933 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:10,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:10,937 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:10,938 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 13 of 18 statements. [2025-04-13 20:22:10,938 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-13 20:22:10,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:10,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:10,956 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604934987] [2025-04-13 20:22:10,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604934987] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:10,956 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133189137] [2025-04-13 20:22:10,956 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:10,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:10,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:10,958 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 20:22:10,960 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 20:22:10,999 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:11,005 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 13 of 18 statements. [2025-04-13 20:22:11,006 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-13 20:22:11,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:11,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 20:22:11,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:11,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133189137] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:11,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:11,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2025-04-13 20:22:11,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105035510] [2025-04-13 20:22:11,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:11,047 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:22:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:11,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:22:11,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:22:11,047 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:11,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 1312 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:11,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:11,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:11,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:11,204 INFO L116 PetriNetUnfolderBase]: 490/884 cut-off events. [2025-04-13 20:22:11,204 INFO L117 PetriNetUnfolderBase]: For 7519/7519 co-relation queries the response was YES. [2025-04-13 20:22:11,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5646 conditions, 884 events. 490/884 cut-off events. For 7519/7519 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4413 event pairs, 85 based on Foata normal form. 24/868 useless extension candidates. Maximal degree in co-relation 5608. Up to 373 conditions per place. [2025-04-13 20:22:11,209 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 112 selfloop transitions, 37 changer transitions 3/152 dead transitions. [2025-04-13 20:22:11,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 152 transitions, 2107 flow [2025-04-13 20:22:11,210 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:22:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:22:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2025-04-13 20:22:11,210 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.391304347826087 [2025-04-13 20:22:11,210 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 1312 flow. Second operand 6 states and 54 transitions. [2025-04-13 20:22:11,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 152 transitions, 2107 flow [2025-04-13 20:22:11,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 152 transitions, 1972 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-04-13 20:22:11,224 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 1514 flow [2025-04-13 20:22:11,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1514, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2025-04-13 20:22:11,225 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 77 predicate places. [2025-04-13 20:22:11,225 INFO L485 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 1514 flow [2025-04-13 20:22:11,225 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:11,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:11,225 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 20:22:11,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:11,429 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-13 20:22:11,429 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 20:22:11,429 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash 64256420, now seen corresponding path program 5 times [2025-04-13 20:22:11,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:11,429 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162966171] [2025-04-13 20:22:11,429 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:11,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:11,434 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:11,436 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:11,436 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:11,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:11,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:11,466 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162966171] [2025-04-13 20:22:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162966171] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:22:11,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:22:11,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:22:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628341973] [2025-04-13 20:22:11,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:11,466 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:22:11,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:11,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:22:11,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:22:11,467 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:11,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 1514 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 20:22:11,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:11,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:11,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:11,605 INFO L116 PetriNetUnfolderBase]: 452/834 cut-off events. [2025-04-13 20:22:11,605 INFO L117 PetriNetUnfolderBase]: For 7473/7473 co-relation queries the response was YES. [2025-04-13 20:22:11,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5514 conditions, 834 events. 452/834 cut-off events. For 7473/7473 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4197 event pairs, 80 based on Foata normal form. 24/848 useless extension candidates. Maximal degree in co-relation 5474. Up to 322 conditions per place. [2025-04-13 20:22:11,611 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 113 selfloop transitions, 30 changer transitions 6/149 dead transitions. [2025-04-13 20:22:11,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 149 transitions, 2090 flow [2025-04-13 20:22:11,612 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:22:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:22:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2025-04-13 20:22:11,612 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-04-13 20:22:11,612 INFO L175 Difference]: Start difference. First operand has 99 places, 120 transitions, 1514 flow. Second operand 5 states and 46 transitions. [2025-04-13 20:22:11,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 149 transitions, 2090 flow [2025-04-13 20:22:11,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 149 transitions, 2048 flow, removed 19 selfloop flow, removed 1 redundant places. [2025-04-13 20:22:11,631 INFO L231 Difference]: Finished difference. Result has 103 places, 118 transitions, 1488 flow [2025-04-13 20:22:11,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1488, PETRI_PLACES=103, PETRI_TRANSITIONS=118} [2025-04-13 20:22:11,632 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 81 predicate places. [2025-04-13 20:22:11,632 INFO L485 AbstractCegarLoop]: Abstraction has has 103 places, 118 transitions, 1488 flow [2025-04-13 20:22:11,632 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 20:22:11,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:11,632 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 20:22:11,632 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-04-13 20:22:11,633 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 20:22:11,633 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1209043142, now seen corresponding path program 6 times [2025-04-13 20:22:11,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:11,633 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238387914] [2025-04-13 20:22:11,633 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:11,638 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:11,645 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:11,645 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:22:11,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:11,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:11,683 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238387914] [2025-04-13 20:22:11,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238387914] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:11,683 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982328287] [2025-04-13 20:22:11,683 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:11,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:11,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:11,685 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 20:22:11,686 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 20:22:11,726 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:11,739 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:11,739 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:22:11,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:11,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 20:22:11,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:11,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982328287] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:11,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:11,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2025-04-13 20:22:11,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765253631] [2025-04-13 20:22:11,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:11,777 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:22:11,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:11,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:22:11,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:22:11,778 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:11,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 118 transitions, 1488 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:11,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:11,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:11,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:11,938 INFO L116 PetriNetUnfolderBase]: 447/802 cut-off events. [2025-04-13 20:22:11,938 INFO L117 PetriNetUnfolderBase]: For 7902/7902 co-relation queries the response was YES. [2025-04-13 20:22:11,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5315 conditions, 802 events. 447/802 cut-off events. For 7902/7902 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3811 event pairs, 65 based on Foata normal form. 16/802 useless extension candidates. Maximal degree in co-relation 5274. Up to 351 conditions per place. [2025-04-13 20:22:11,943 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 120 selfloop transitions, 39 changer transitions 10/169 dead transitions. [2025-04-13 20:22:11,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 169 transitions, 2320 flow [2025-04-13 20:22:11,943 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:22:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:22:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2025-04-13 20:22:11,944 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40993788819875776 [2025-04-13 20:22:11,944 INFO L175 Difference]: Start difference. First operand has 103 places, 118 transitions, 1488 flow. Second operand 7 states and 66 transitions. [2025-04-13 20:22:11,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 169 transitions, 2320 flow [2025-04-13 20:22:11,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 169 transitions, 2204 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-04-13 20:22:11,962 INFO L231 Difference]: Finished difference. Result has 109 places, 119 transitions, 1529 flow [2025-04-13 20:22:11,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1529, PETRI_PLACES=109, PETRI_TRANSITIONS=119} [2025-04-13 20:22:11,963 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 87 predicate places. [2025-04-13 20:22:11,963 INFO L485 AbstractCegarLoop]: Abstraction has has 109 places, 119 transitions, 1529 flow [2025-04-13 20:22:11,964 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:11,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:11,964 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:11,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:12,164 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:12,165 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 20:22:12,165 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash -517914302, now seen corresponding path program 2 times [2025-04-13 20:22:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:12,165 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240477776] [2025-04-13 20:22:12,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:12,170 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-13 20:22:12,174 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-13 20:22:12,174 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:12,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:12,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:12,202 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240477776] [2025-04-13 20:22:12,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240477776] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:12,202 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878315170] [2025-04-13 20:22:12,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:12,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:12,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:12,208 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 20:22:12,209 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 20:22:12,246 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-13 20:22:12,261 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-13 20:22:12,261 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:12,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:12,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-13 20:22:12,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:12,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:12,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878315170] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:12,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:22:12,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2025-04-13 20:22:12,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846452905] [2025-04-13 20:22:12,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:22:12,341 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:22:12,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:12,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:22:12,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-04-13 20:22:12,341 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:12,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 119 transitions, 1529 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 20:22:12,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:12,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:12,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:12,430 INFO L116 PetriNetUnfolderBase]: 298/508 cut-off events. [2025-04-13 20:22:12,430 INFO L117 PetriNetUnfolderBase]: For 5683/5683 co-relation queries the response was YES. [2025-04-13 20:22:12,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3465 conditions, 508 events. 298/508 cut-off events. For 5683/5683 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1953 event pairs, 95 based on Foata normal form. 39/533 useless extension candidates. Maximal degree in co-relation 3421. Up to 371 conditions per place. [2025-04-13 20:22:12,436 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 95 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2025-04-13 20:22:12,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 1614 flow [2025-04-13 20:22:12,436 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:22:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:22:12,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 41 transitions. [2025-04-13 20:22:12,436 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2971014492753623 [2025-04-13 20:22:12,436 INFO L175 Difference]: Start difference. First operand has 109 places, 119 transitions, 1529 flow. Second operand 6 states and 41 transitions. [2025-04-13 20:22:12,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 1614 flow [2025-04-13 20:22:12,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 114 transitions, 1521 flow, removed 24 selfloop flow, removed 9 redundant places. [2025-04-13 20:22:12,447 INFO L231 Difference]: Finished difference. Result has 101 places, 104 transitions, 1260 flow [2025-04-13 20:22:12,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1260, PETRI_PLACES=101, PETRI_TRANSITIONS=104} [2025-04-13 20:22:12,448 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 79 predicate places. [2025-04-13 20:22:12,448 INFO L485 AbstractCegarLoop]: Abstraction has has 101 places, 104 transitions, 1260 flow [2025-04-13 20:22:12,448 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 20:22:12,448 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:12,448 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:12,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-13 20:22:12,648 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:12,649 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 20:22:12,649 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1609459193, now seen corresponding path program 1 times [2025-04-13 20:22:12,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:12,649 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286111666] [2025-04-13 20:22:12,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:12,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:12,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:22:12,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:12,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:12,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:13,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:13,083 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286111666] [2025-04-13 20:22:13,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286111666] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:13,083 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932484907] [2025-04-13 20:22:13,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:22:13,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:13,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:13,085 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 20:22:13,086 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 20:22:13,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:22:13,138 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:13,138 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:13,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:13,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:22:13,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:13,283 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:13,440 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:13,441 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 35 treesize of output 43 [2025-04-13 20:22:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932484907] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:13,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:13,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 25 [2025-04-13 20:22:13,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178819622] [2025-04-13 20:22:13,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:13,481 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-13 20:22:13,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:13,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-13 20:22:13,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2025-04-13 20:22:13,482 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:13,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 104 transitions, 1260 flow. Second operand has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 27 states have internal predecessors, (101), 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 20:22:13,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:13,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:13,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:14,328 INFO L116 PetriNetUnfolderBase]: 394/683 cut-off events. [2025-04-13 20:22:14,328 INFO L117 PetriNetUnfolderBase]: For 5669/5669 co-relation queries the response was YES. [2025-04-13 20:22:14,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4341 conditions, 683 events. 394/683 cut-off events. For 5669/5669 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2886 event pairs, 17 based on Foata normal form. 2/653 useless extension candidates. Maximal degree in co-relation 4305. Up to 459 conditions per place. [2025-04-13 20:22:14,333 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 128 selfloop transitions, 55 changer transitions 3/186 dead transitions. [2025-04-13 20:22:14,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 186 transitions, 2217 flow [2025-04-13 20:22:14,333 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-13 20:22:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-13 20:22:14,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 153 transitions. [2025-04-13 20:22:14,334 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33260869565217394 [2025-04-13 20:22:14,334 INFO L175 Difference]: Start difference. First operand has 101 places, 104 transitions, 1260 flow. Second operand 20 states and 153 transitions. [2025-04-13 20:22:14,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 186 transitions, 2217 flow [2025-04-13 20:22:14,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 2165 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-04-13 20:22:14,345 INFO L231 Difference]: Finished difference. Result has 123 places, 134 transitions, 1770 flow [2025-04-13 20:22:14,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1770, PETRI_PLACES=123, PETRI_TRANSITIONS=134} [2025-04-13 20:22:14,346 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 101 predicate places. [2025-04-13 20:22:14,346 INFO L485 AbstractCegarLoop]: Abstraction has has 123 places, 134 transitions, 1770 flow [2025-04-13 20:22:14,346 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 27 states have internal predecessors, (101), 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 20:22:14,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:14,346 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:14,352 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 20:22:14,550 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:14,550 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 20:22:14,550 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1836551737, now seen corresponding path program 2 times [2025-04-13 20:22:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:14,550 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717818171] [2025-04-13 20:22:14,550 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:14,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:14,555 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:14,577 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:14,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:14,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:14,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:14,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717818171] [2025-04-13 20:22:14,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717818171] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:14,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068615529] [2025-04-13 20:22:14,867 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:14,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:14,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:14,869 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 20:22:14,870 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 20:22:14,906 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:14,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:14,922 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:14,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:14,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-04-13 20:22:14,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:15,035 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:15,035 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 17 treesize of output 14 [2025-04-13 20:22:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:15,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:15,220 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:15,220 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 17 treesize of output 14 [2025-04-13 20:22:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:15,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068615529] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:15,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:15,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 24 [2025-04-13 20:22:15,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319350586] [2025-04-13 20:22:15,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:15,249 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-13 20:22:15,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:15,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-13 20:22:15,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2025-04-13 20:22:15,249 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:15,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 134 transitions, 1770 flow. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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 20:22:15,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:15,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:15,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:15,971 INFO L116 PetriNetUnfolderBase]: 454/796 cut-off events. [2025-04-13 20:22:15,971 INFO L117 PetriNetUnfolderBase]: For 7795/7795 co-relation queries the response was YES. [2025-04-13 20:22:15,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5495 conditions, 796 events. 454/796 cut-off events. For 7795/7795 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3546 event pairs, 35 based on Foata normal form. 1/761 useless extension candidates. Maximal degree in co-relation 5451. Up to 582 conditions per place. [2025-04-13 20:22:15,976 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 129 selfloop transitions, 81 changer transitions 5/215 dead transitions. [2025-04-13 20:22:15,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 215 transitions, 2812 flow [2025-04-13 20:22:15,977 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-13 20:22:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-13 20:22:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 174 transitions. [2025-04-13 20:22:15,978 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28019323671497587 [2025-04-13 20:22:15,978 INFO L175 Difference]: Start difference. First operand has 123 places, 134 transitions, 1770 flow. Second operand 27 states and 174 transitions. [2025-04-13 20:22:15,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 215 transitions, 2812 flow [2025-04-13 20:22:15,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 215 transitions, 2471 flow, removed 141 selfloop flow, removed 5 redundant places. [2025-04-13 20:22:15,997 INFO L231 Difference]: Finished difference. Result has 151 places, 165 transitions, 2090 flow [2025-04-13 20:22:15,997 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2090, PETRI_PLACES=151, PETRI_TRANSITIONS=165} [2025-04-13 20:22:15,997 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2025-04-13 20:22:15,997 INFO L485 AbstractCegarLoop]: Abstraction has has 151 places, 165 transitions, 2090 flow [2025-04-13 20:22:15,997 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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 20:22:15,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:15,998 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:16,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-13 20:22:16,202 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,SelfDestructingSolverStorable20 [2025-04-13 20:22:16,202 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 20:22:16,202 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1014461981, now seen corresponding path program 3 times [2025-04-13 20:22:16,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:16,202 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132323592] [2025-04-13 20:22:16,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:22:16,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:16,207 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:16,215 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:16,215 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:22:16,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:16,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:16,482 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132323592] [2025-04-13 20:22:16,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132323592] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:16,482 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554281328] [2025-04-13 20:22:16,482 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:22:16,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:16,484 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 20:22:16,485 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 20:22:16,521 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:16,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:16,538 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:22:16,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:16,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-04-13 20:22:16,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:16,668 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:16,668 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 17 treesize of output 14 [2025-04-13 20:22:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:16,693 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:16,867 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:16,868 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 17 treesize of output 14 [2025-04-13 20:22:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:16,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554281328] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:16,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:16,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 10] total 25 [2025-04-13 20:22:16,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496840703] [2025-04-13 20:22:16,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:16,894 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-13 20:22:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:16,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-13 20:22:16,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2025-04-13 20:22:16,895 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:16,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 165 transitions, 2090 flow. Second operand has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 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 20:22:16,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:16,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:16,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:17,753 INFO L116 PetriNetUnfolderBase]: 589/1022 cut-off events. [2025-04-13 20:22:17,753 INFO L117 PetriNetUnfolderBase]: For 11758/11758 co-relation queries the response was YES. [2025-04-13 20:22:17,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7156 conditions, 1022 events. 589/1022 cut-off events. For 11758/11758 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4854 event pairs, 45 based on Foata normal form. 1/975 useless extension candidates. Maximal degree in co-relation 7106. Up to 698 conditions per place. [2025-04-13 20:22:17,759 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 145 selfloop transitions, 138 changer transitions 5/288 dead transitions. [2025-04-13 20:22:17,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 288 transitions, 3934 flow [2025-04-13 20:22:17,760 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:22:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:22:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 225 transitions. [2025-04-13 20:22:17,761 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2717391304347826 [2025-04-13 20:22:17,761 INFO L175 Difference]: Start difference. First operand has 151 places, 165 transitions, 2090 flow. Second operand 36 states and 225 transitions. [2025-04-13 20:22:17,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 288 transitions, 3934 flow [2025-04-13 20:22:17,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 288 transitions, 3648 flow, removed 103 selfloop flow, removed 10 redundant places. [2025-04-13 20:22:17,790 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 3299 flow [2025-04-13 20:22:17,790 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3299, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2025-04-13 20:22:17,790 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 162 predicate places. [2025-04-13 20:22:17,790 INFO L485 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 3299 flow [2025-04-13 20:22:17,791 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 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 20:22:17,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:17,791 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:17,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-13 20:22:17,996 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,SelfDestructingSolverStorable21 [2025-04-13 20:22:17,996 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 20:22:17,996 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -2019889405, now seen corresponding path program 4 times [2025-04-13 20:22:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:17,996 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107852226] [2025-04-13 20:22:17,996 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:18,000 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:18,014 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 20:22:18,014 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:22:18,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:18,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:18,294 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107852226] [2025-04-13 20:22:18,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107852226] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:18,294 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519289800] [2025-04-13 20:22:18,294 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:18,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:18,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:18,296 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 20:22:18,298 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 20:22:18,339 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:18,357 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 20:22:18,357 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:22:18,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:18,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:22:18,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:18,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:18,612 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:18,613 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 35 treesize of output 43 [2025-04-13 20:22:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:18,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519289800] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:18,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:18,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 25 [2025-04-13 20:22:18,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831723916] [2025-04-13 20:22:18,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:18,649 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-13 20:22:18,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:18,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-13 20:22:18,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2025-04-13 20:22:18,650 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:18,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 3299 flow. Second operand has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 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 20:22:18,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:18,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:18,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:19,294 INFO L116 PetriNetUnfolderBase]: 637/1104 cut-off events. [2025-04-13 20:22:19,295 INFO L117 PetriNetUnfolderBase]: For 13437/13437 co-relation queries the response was YES. [2025-04-13 20:22:19,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8159 conditions, 1104 events. 637/1104 cut-off events. For 13437/13437 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5359 event pairs, 58 based on Foata normal form. 1/1051 useless extension candidates. Maximal degree in co-relation 8101. Up to 885 conditions per place. [2025-04-13 20:22:19,301 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 206 selfloop transitions, 71 changer transitions 1/278 dead transitions. [2025-04-13 20:22:19,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 278 transitions, 4204 flow [2025-04-13 20:22:19,301 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 20:22:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-13 20:22:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 117 transitions. [2025-04-13 20:22:19,302 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3179347826086957 [2025-04-13 20:22:19,302 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 3299 flow. Second operand 16 states and 117 transitions. [2025-04-13 20:22:19,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 278 transitions, 4204 flow [2025-04-13 20:22:19,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 278 transitions, 3546 flow, removed 277 selfloop flow, removed 15 redundant places. [2025-04-13 20:22:19,357 INFO L231 Difference]: Finished difference. Result has 187 places, 251 transitions, 3059 flow [2025-04-13 20:22:19,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3059, PETRI_PLACES=187, PETRI_TRANSITIONS=251} [2025-04-13 20:22:19,358 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 165 predicate places. [2025-04-13 20:22:19,358 INFO L485 AbstractCegarLoop]: Abstraction has has 187 places, 251 transitions, 3059 flow [2025-04-13 20:22:19,358 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 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 20:22:19,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:19,358 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:19,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:19,560 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,SelfDestructingSolverStorable22 [2025-04-13 20:22:19,560 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 20:22:19,560 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1786739975, now seen corresponding path program 5 times [2025-04-13 20:22:19,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:19,560 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120227264] [2025-04-13 20:22:19,560 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:19,565 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:19,570 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:19,570 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:19,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:19,989 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 20:22:19,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:19,989 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120227264] [2025-04-13 20:22:19,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120227264] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:19,990 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137739926] [2025-04-13 20:22:19,990 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:19,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:19,991 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 20:22:19,993 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 20:22:20,035 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:20,049 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:20,049 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:20,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:20,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:22:20,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:20,188 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:20,188 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 35 treesize of output 41 [2025-04-13 20:22:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:20,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137739926] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:20,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 25 [2025-04-13 20:22:20,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233592442] [2025-04-13 20:22:20,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:20,360 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-13 20:22:20,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:20,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-13 20:22:20,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2025-04-13 20:22:20,361 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:20,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 251 transitions, 3059 flow. Second operand has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 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 20:22:20,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:20,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:20,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:21,399 INFO L116 PetriNetUnfolderBase]: 863/1491 cut-off events. [2025-04-13 20:22:21,399 INFO L117 PetriNetUnfolderBase]: For 17013/17013 co-relation queries the response was YES. [2025-04-13 20:22:21,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10572 conditions, 1491 events. 863/1491 cut-off events. For 17013/17013 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7711 event pairs, 51 based on Foata normal form. 2/1417 useless extension candidates. Maximal degree in co-relation 10513. Up to 1056 conditions per place. [2025-04-13 20:22:21,409 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 226 selfloop transitions, 187 changer transitions 7/420 dead transitions. [2025-04-13 20:22:21,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 420 transitions, 5723 flow [2025-04-13 20:22:21,409 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-04-13 20:22:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-04-13 20:22:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 248 transitions. [2025-04-13 20:22:21,411 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27647714604236345 [2025-04-13 20:22:21,411 INFO L175 Difference]: Start difference. First operand has 187 places, 251 transitions, 3059 flow. Second operand 39 states and 248 transitions. [2025-04-13 20:22:21,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 420 transitions, 5723 flow [2025-04-13 20:22:21,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 420 transitions, 5472 flow, removed 94 selfloop flow, removed 8 redundant places. [2025-04-13 20:22:21,461 INFO L231 Difference]: Finished difference. Result has 229 places, 360 transitions, 5035 flow [2025-04-13 20:22:21,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2860, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=5035, PETRI_PLACES=229, PETRI_TRANSITIONS=360} [2025-04-13 20:22:21,461 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 207 predicate places. [2025-04-13 20:22:21,461 INFO L485 AbstractCegarLoop]: Abstraction has has 229 places, 360 transitions, 5035 flow [2025-04-13 20:22:21,461 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 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 20:22:21,462 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:21,462 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:21,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:21,662 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,SelfDestructingSolverStorable23 [2025-04-13 20:22:21,662 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 20:22:21,663 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1473541279, now seen corresponding path program 6 times [2025-04-13 20:22:21,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:21,663 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442937800] [2025-04-13 20:22:21,663 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:21,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:21,667 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:21,674 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:21,674 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:22:21,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:21,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:21,883 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442937800] [2025-04-13 20:22:21,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442937800] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:21,883 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681655529] [2025-04-13 20:22:21,883 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:21,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:21,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:21,886 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 20:22:21,887 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 20:22:21,924 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:21,941 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:21,941 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:22:21,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:21,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:22:21,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:21,996 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:22:22,223 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:22,224 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 19 treesize of output 16 [2025-04-13 20:22:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:22,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:22,669 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 36 treesize of output 32 [2025-04-13 20:22:22,675 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:22,675 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 66 [2025-04-13 20:22:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:22,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681655529] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:22,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:22,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 37 [2025-04-13 20:22:22,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814482002] [2025-04-13 20:22:22,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:22,754 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:22:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:22,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:22:22,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:22:22,755 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:22,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 360 transitions, 5035 flow. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:22:22,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:22,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:22,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:24,254 INFO L116 PetriNetUnfolderBase]: 1007/1724 cut-off events. [2025-04-13 20:22:24,254 INFO L117 PetriNetUnfolderBase]: For 21986/21986 co-relation queries the response was YES. [2025-04-13 20:22:24,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13421 conditions, 1724 events. 1007/1724 cut-off events. For 21986/21986 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9089 event pairs, 61 based on Foata normal form. 3/1639 useless extension candidates. Maximal degree in co-relation 13349. Up to 1350 conditions per place. [2025-04-13 20:22:24,265 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 303 selfloop transitions, 192 changer transitions 11/506 dead transitions. [2025-04-13 20:22:24,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 506 transitions, 7833 flow [2025-04-13 20:22:24,265 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-04-13 20:22:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-04-13 20:22:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 303 transitions. [2025-04-13 20:22:24,268 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2688553682342502 [2025-04-13 20:22:24,268 INFO L175 Difference]: Start difference. First operand has 229 places, 360 transitions, 5035 flow. Second operand 49 states and 303 transitions. [2025-04-13 20:22:24,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 506 transitions, 7833 flow [2025-04-13 20:22:24,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 506 transitions, 6826 flow, removed 468 selfloop flow, removed 13 redundant places. [2025-04-13 20:22:24,385 INFO L231 Difference]: Finished difference. Result has 273 places, 444 transitions, 6138 flow [2025-04-13 20:22:24,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=6138, PETRI_PLACES=273, PETRI_TRANSITIONS=444} [2025-04-13 20:22:24,385 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 251 predicate places. [2025-04-13 20:22:24,385 INFO L485 AbstractCegarLoop]: Abstraction has has 273 places, 444 transitions, 6138 flow [2025-04-13 20:22:24,386 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:22:24,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:24,386 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:24,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:24,586 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:24,586 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 20:22:24,587 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:24,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1791208625, now seen corresponding path program 7 times [2025-04-13 20:22:24,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:24,587 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956288618] [2025-04-13 20:22:24,587 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:22:24,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:24,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:22:24,604 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:24,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:24,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:24,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:24,944 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956288618] [2025-04-13 20:22:24,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956288618] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:24,944 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028910800] [2025-04-13 20:22:24,944 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:22:24,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:24,946 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 20:22:24,948 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 20:22:24,989 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:22:25,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:25,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:25,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:25,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:22:25,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:25,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:25,266 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:25,267 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 35 treesize of output 43 [2025-04-13 20:22:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:25,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028910800] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:25,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:25,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:22:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117971751] [2025-04-13 20:22:25,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:25,295 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:22:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:25,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:22:25,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:22:25,296 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:25,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 444 transitions, 6138 flow. Second operand has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:22:25,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:25,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:25,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:26,128 INFO L116 PetriNetUnfolderBase]: 1073/1841 cut-off events. [2025-04-13 20:22:26,129 INFO L117 PetriNetUnfolderBase]: For 20374/20374 co-relation queries the response was YES. [2025-04-13 20:22:26,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13737 conditions, 1841 events. 1073/1841 cut-off events. For 20374/20374 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9908 event pairs, 92 based on Foata normal form. 3/1760 useless extension candidates. Maximal degree in co-relation 13655. Up to 1508 conditions per place. [2025-04-13 20:22:26,143 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 389 selfloop transitions, 111 changer transitions 3/503 dead transitions. [2025-04-13 20:22:26,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 503 transitions, 7646 flow [2025-04-13 20:22:26,143 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 20:22:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 20:22:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 143 transitions. [2025-04-13 20:22:26,144 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29606625258799174 [2025-04-13 20:22:26,144 INFO L175 Difference]: Start difference. First operand has 273 places, 444 transitions, 6138 flow. Second operand 21 states and 143 transitions. [2025-04-13 20:22:26,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 503 transitions, 7646 flow [2025-04-13 20:22:26,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 503 transitions, 6463 flow, removed 528 selfloop flow, removed 20 redundant places. [2025-04-13 20:22:26,287 INFO L231 Difference]: Finished difference. Result has 274 places, 459 transitions, 5484 flow [2025-04-13 20:22:26,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4959, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5484, PETRI_PLACES=274, PETRI_TRANSITIONS=459} [2025-04-13 20:22:26,288 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 252 predicate places. [2025-04-13 20:22:26,289 INFO L485 AbstractCegarLoop]: Abstraction has has 274 places, 459 transitions, 5484 flow [2025-04-13 20:22:26,289 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:22:26,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:26,289 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:26,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:26,493 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-04-13 20:22:26,493 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 20:22:26,494 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:26,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2092391951, now seen corresponding path program 8 times [2025-04-13 20:22:26,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:26,494 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100414989] [2025-04-13 20:22:26,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:26,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:26,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:26,505 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:26,505 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:26,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:26,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:26,761 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100414989] [2025-04-13 20:22:26,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100414989] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:26,761 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203996047] [2025-04-13 20:22:26,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:26,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:26,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:26,763 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 20:22:26,764 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 20:22:26,808 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:26,824 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:26,824 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:26,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:26,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-04-13 20:22:26,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:26,850 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:22:26,981 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:26,981 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 17 treesize of output 14 [2025-04-13 20:22:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:27,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:27,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203996047] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:27,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:27,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 29 [2025-04-13 20:22:27,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485005926] [2025-04-13 20:22:27,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:27,184 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-13 20:22:27,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:27,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-13 20:22:27,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2025-04-13 20:22:27,185 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 459 transitions, 5484 flow. Second operand has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 31 states have internal predecessors, (113), 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 20:22:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:27,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:27,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:27,896 INFO L116 PetriNetUnfolderBase]: 1175/2044 cut-off events. [2025-04-13 20:22:27,897 INFO L117 PetriNetUnfolderBase]: For 19578/19578 co-relation queries the response was YES. [2025-04-13 20:22:27,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13990 conditions, 2044 events. 1175/2044 cut-off events. For 19578/19578 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11448 event pairs, 60 based on Foata normal form. 2/1944 useless extension candidates. Maximal degree in co-relation 13908. Up to 1758 conditions per place. [2025-04-13 20:22:27,911 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 426 selfloop transitions, 117 changer transitions 6/549 dead transitions. [2025-04-13 20:22:27,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 549 transitions, 7315 flow [2025-04-13 20:22:27,911 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-13 20:22:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-13 20:22:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 158 transitions. [2025-04-13 20:22:27,912 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2747826086956522 [2025-04-13 20:22:27,912 INFO L175 Difference]: Start difference. First operand has 274 places, 459 transitions, 5484 flow. Second operand 25 states and 158 transitions. [2025-04-13 20:22:27,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 549 transitions, 7315 flow [2025-04-13 20:22:28,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 549 transitions, 7163 flow, removed 34 selfloop flow, removed 12 redundant places. [2025-04-13 20:22:28,013 INFO L231 Difference]: Finished difference. Result has 295 places, 512 transitions, 6365 flow [2025-04-13 20:22:28,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6365, PETRI_PLACES=295, PETRI_TRANSITIONS=512} [2025-04-13 20:22:28,013 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 273 predicate places. [2025-04-13 20:22:28,013 INFO L485 AbstractCegarLoop]: Abstraction has has 295 places, 512 transitions, 6365 flow [2025-04-13 20:22:28,013 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.6451612903225805) internal successors, (113), 31 states have internal predecessors, (113), 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 20:22:28,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:28,014 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:28,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:28,214 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-04-13 20:22:28,214 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 20:22:28,215 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:28,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1748071323, now seen corresponding path program 9 times [2025-04-13 20:22:28,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:28,215 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553024407] [2025-04-13 20:22:28,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:22:28,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:28,219 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:28,224 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:28,224 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:22:28,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:28,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:28,449 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553024407] [2025-04-13 20:22:28,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553024407] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:28,449 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806913271] [2025-04-13 20:22:28,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:22:28,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:28,451 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 20:22:28,453 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 20:22:28,491 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:28,504 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:28,504 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:22:28,504 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:28,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:22:28,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:28,542 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:22:28,736 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:28,736 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 17 treesize of output 14 [2025-04-13 20:22:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:28,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:29,102 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 36 treesize of output 32 [2025-04-13 20:22:29,108 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:29,108 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 62 [2025-04-13 20:22:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806913271] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:29,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:29,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 37 [2025-04-13 20:22:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751433046] [2025-04-13 20:22:29,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:29,218 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:22:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:29,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:22:29,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:22:29,218 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:29,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 512 transitions, 6365 flow. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 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 20:22:29,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:29,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:29,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:30,953 INFO L116 PetriNetUnfolderBase]: 1270/2207 cut-off events. [2025-04-13 20:22:30,953 INFO L117 PetriNetUnfolderBase]: For 27477/27477 co-relation queries the response was YES. [2025-04-13 20:22:30,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16295 conditions, 2207 events. 1270/2207 cut-off events. For 27477/27477 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12640 event pairs, 65 based on Foata normal form. 5/2164 useless extension candidates. Maximal degree in co-relation 16203. Up to 1668 conditions per place. [2025-04-13 20:22:30,967 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 375 selfloop transitions, 244 changer transitions 13/632 dead transitions. [2025-04-13 20:22:30,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 632 transitions, 8987 flow [2025-04-13 20:22:30,967 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-04-13 20:22:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2025-04-13 20:22:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 303 transitions. [2025-04-13 20:22:30,968 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2634782608695652 [2025-04-13 20:22:30,968 INFO L175 Difference]: Start difference. First operand has 295 places, 512 transitions, 6365 flow. Second operand 50 states and 303 transitions. [2025-04-13 20:22:30,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 632 transitions, 8987 flow [2025-04-13 20:22:31,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 632 transitions, 8749 flow, removed 89 selfloop flow, removed 12 redundant places. [2025-04-13 20:22:31,106 INFO L231 Difference]: Finished difference. Result has 340 places, 563 transitions, 7923 flow [2025-04-13 20:22:31,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=7923, PETRI_PLACES=340, PETRI_TRANSITIONS=563} [2025-04-13 20:22:31,107 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 318 predicate places. [2025-04-13 20:22:31,107 INFO L485 AbstractCegarLoop]: Abstraction has has 340 places, 563 transitions, 7923 flow [2025-04-13 20:22:31,107 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 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 20:22:31,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:31,107 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:31,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:31,307 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-04-13 20:22:31,307 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 20:22:31,308 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash 130211949, now seen corresponding path program 10 times [2025-04-13 20:22:31,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:31,308 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316086854] [2025-04-13 20:22:31,308 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:31,312 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:31,317 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 20:22:31,317 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:22:31,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:31,696 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 20:22:31,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:31,696 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316086854] [2025-04-13 20:22:31,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316086854] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:31,696 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051207701] [2025-04-13 20:22:31,697 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:31,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:31,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:31,698 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 20:22:31,700 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 20:22:31,736 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:31,748 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 20:22:31,748 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:22:31,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:31,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:22:31,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:31,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:31,978 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:31,979 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 35 treesize of output 43 [2025-04-13 20:22:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:32,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051207701] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:32,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:32,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:22:32,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585451309] [2025-04-13 20:22:32,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:32,007 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:22:32,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:32,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:22:32,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:22:32,007 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:32,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 563 transitions, 7923 flow. Second operand has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:22:32,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:32,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:32,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:32,897 INFO L116 PetriNetUnfolderBase]: 1411/2430 cut-off events. [2025-04-13 20:22:32,897 INFO L117 PetriNetUnfolderBase]: For 32324/32324 co-relation queries the response was YES. [2025-04-13 20:22:32,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19359 conditions, 2430 events. 1411/2430 cut-off events. For 32324/32324 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 13948 event pairs, 91 based on Foata normal form. 1/2387 useless extension candidates. Maximal degree in co-relation 19258. Up to 2092 conditions per place. [2025-04-13 20:22:32,913 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 557 selfloop transitions, 122 changer transitions 1/680 dead transitions. [2025-04-13 20:22:32,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 680 transitions, 10993 flow [2025-04-13 20:22:32,913 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-13 20:22:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-13 20:22:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 175 transitions. [2025-04-13 20:22:32,914 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2025-04-13 20:22:32,914 INFO L175 Difference]: Start difference. First operand has 340 places, 563 transitions, 7923 flow. Second operand 25 states and 175 transitions. [2025-04-13 20:22:32,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 680 transitions, 10993 flow [2025-04-13 20:22:33,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 680 transitions, 10037 flow, removed 394 selfloop flow, removed 22 redundant places. [2025-04-13 20:22:33,080 INFO L231 Difference]: Finished difference. Result has 342 places, 625 transitions, 8461 flow [2025-04-13 20:22:33,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7032, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8461, PETRI_PLACES=342, PETRI_TRANSITIONS=625} [2025-04-13 20:22:33,081 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 320 predicate places. [2025-04-13 20:22:33,082 INFO L485 AbstractCegarLoop]: Abstraction has has 342 places, 625 transitions, 8461 flow [2025-04-13 20:22:33,082 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:22:33,082 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:33,082 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:33,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:33,282 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-04-13 20:22:33,282 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 20:22:33,283 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1654685577, now seen corresponding path program 11 times [2025-04-13 20:22:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:33,283 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388089996] [2025-04-13 20:22:33,283 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:33,287 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:33,291 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:33,291 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:33,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:33,587 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 20:22:33,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:33,587 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388089996] [2025-04-13 20:22:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388089996] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:33,587 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105935133] [2025-04-13 20:22:33,587 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:33,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:33,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:33,589 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 20:22:33,590 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 20:22:33,629 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:33,642 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:33,643 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:33,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:33,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-13 20:22:33,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:33,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:33,838 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:33,838 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 35 treesize of output 43 [2025-04-13 20:22:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:33,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105935133] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:33,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:33,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2025-04-13 20:22:33,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519699859] [2025-04-13 20:22:33,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:33,867 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 20:22:33,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:33,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 20:22:33,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2025-04-13 20:22:33,867 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:33,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 625 transitions, 8461 flow. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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 20:22:33,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:33,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:33,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:34,894 INFO L116 PetriNetUnfolderBase]: 1518/2623 cut-off events. [2025-04-13 20:22:34,894 INFO L117 PetriNetUnfolderBase]: For 36053/36053 co-relation queries the response was YES. [2025-04-13 20:22:34,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20728 conditions, 2623 events. 1518/2623 cut-off events. For 36053/36053 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15311 event pairs, 99 based on Foata normal form. 1/2574 useless extension candidates. Maximal degree in co-relation 20627. Up to 2140 conditions per place. [2025-04-13 20:22:34,914 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 518 selfloop transitions, 213 changer transitions 2/733 dead transitions. [2025-04-13 20:22:34,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 733 transitions, 11595 flow [2025-04-13 20:22:34,914 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-13 20:22:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-13 20:22:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 206 transitions. [2025-04-13 20:22:34,915 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2798913043478261 [2025-04-13 20:22:34,915 INFO L175 Difference]: Start difference. First operand has 342 places, 625 transitions, 8461 flow. Second operand 32 states and 206 transitions. [2025-04-13 20:22:34,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 733 transitions, 11595 flow [2025-04-13 20:22:35,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 733 transitions, 11355 flow, removed 47 selfloop flow, removed 6 redundant places. [2025-04-13 20:22:35,076 INFO L231 Difference]: Finished difference. Result has 378 places, 692 transitions, 10412 flow [2025-04-13 20:22:35,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10412, PETRI_PLACES=378, PETRI_TRANSITIONS=692} [2025-04-13 20:22:35,076 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 356 predicate places. [2025-04-13 20:22:35,077 INFO L485 AbstractCegarLoop]: Abstraction has has 378 places, 692 transitions, 10412 flow [2025-04-13 20:22:35,077 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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 20:22:35,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:35,077 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:35,082 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 20:22:35,277 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:35,277 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 20:22:35,278 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1571677581, now seen corresponding path program 12 times [2025-04-13 20:22:35,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:35,278 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108737536] [2025-04-13 20:22:35,278 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:35,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:35,282 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:35,287 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:35,287 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:22:35,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:35,526 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108737536] [2025-04-13 20:22:35,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108737536] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:35,526 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998904202] [2025-04-13 20:22:35,526 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:35,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:35,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:35,527 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 20:22:35,528 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 20:22:35,566 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:35,579 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:35,579 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:22:35,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:35,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:22:35,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:35,612 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:22:35,761 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:35,761 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 17 treesize of output 14 [2025-04-13 20:22:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:35,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:36,115 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 36 treesize of output 32 [2025-04-13 20:22:36,121 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:36,122 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 62 [2025-04-13 20:22:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:36,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998904202] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:36,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:36,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 36 [2025-04-13 20:22:36,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731708381] [2025-04-13 20:22:36,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:36,201 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-04-13 20:22:36,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:36,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-04-13 20:22:36,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2025-04-13 20:22:36,202 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:36,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 692 transitions, 10412 flow. Second operand has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 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 20:22:36,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:36,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:36,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:37,503 INFO L116 PetriNetUnfolderBase]: 1532/2661 cut-off events. [2025-04-13 20:22:37,503 INFO L117 PetriNetUnfolderBase]: For 39052/39052 co-relation queries the response was YES. [2025-04-13 20:22:37,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21764 conditions, 2661 events. 1532/2661 cut-off events. For 39052/39052 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15750 event pairs, 77 based on Foata normal form. 2/2615 useless extension candidates. Maximal degree in co-relation 21653. Up to 2178 conditions per place. [2025-04-13 20:22:37,563 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 516 selfloop transitions, 223 changer transitions 7/746 dead transitions. [2025-04-13 20:22:37,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 746 transitions, 12221 flow [2025-04-13 20:22:37,563 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-13 20:22:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-13 20:22:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 209 transitions. [2025-04-13 20:22:37,564 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2596273291925466 [2025-04-13 20:22:37,564 INFO L175 Difference]: Start difference. First operand has 378 places, 692 transitions, 10412 flow. Second operand 35 states and 209 transitions. [2025-04-13 20:22:37,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 746 transitions, 12221 flow [2025-04-13 20:22:37,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 746 transitions, 11245 flow, removed 435 selfloop flow, removed 11 redundant places. [2025-04-13 20:22:37,776 INFO L231 Difference]: Finished difference. Result has 405 places, 698 transitions, 10067 flow [2025-04-13 20:22:37,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9429, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=10067, PETRI_PLACES=405, PETRI_TRANSITIONS=698} [2025-04-13 20:22:37,777 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 383 predicate places. [2025-04-13 20:22:37,777 INFO L485 AbstractCegarLoop]: Abstraction has has 405 places, 698 transitions, 10067 flow [2025-04-13 20:22:37,777 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 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 20:22:37,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:37,777 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:37,783 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 20:22:37,978 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,SelfDestructingSolverStorable30 [2025-04-13 20:22:37,978 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 20:22:37,978 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:37,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1003952629, now seen corresponding path program 13 times [2025-04-13 20:22:37,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:37,978 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688041960] [2025-04-13 20:22:37,979 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:22:37,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:37,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:22:37,986 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:37,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:37,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:38,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:38,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688041960] [2025-04-13 20:22:38,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688041960] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:38,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590515142] [2025-04-13 20:22:38,285 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:22:38,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:38,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:38,287 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 20:22:38,288 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 20:22:38,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:22:38,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:38,347 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:38,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:38,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:22:38,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:38,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:38,599 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:38,599 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 35 treesize of output 43 [2025-04-13 20:22:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:38,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590515142] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:38,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:38,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:22:38,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194303811] [2025-04-13 20:22:38,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:38,629 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:22:38,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:38,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:22:38,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:22:38,630 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:38,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 698 transitions, 10067 flow. Second operand has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:22:38,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:38,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:38,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:39,738 INFO L116 PetriNetUnfolderBase]: 1598/2773 cut-off events. [2025-04-13 20:22:39,739 INFO L117 PetriNetUnfolderBase]: For 42952/42952 co-relation queries the response was YES. [2025-04-13 20:22:39,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22834 conditions, 2773 events. 1598/2773 cut-off events. For 42952/42952 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 16394 event pairs, 108 based on Foata normal form. 2/2729 useless extension candidates. Maximal degree in co-relation 22718. Up to 2301 conditions per place. [2025-04-13 20:22:39,769 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 575 selfloop transitions, 182 changer transitions 3/760 dead transitions. [2025-04-13 20:22:39,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 760 transitions, 12460 flow [2025-04-13 20:22:39,769 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-13 20:22:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-13 20:22:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 171 transitions. [2025-04-13 20:22:39,770 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29739130434782607 [2025-04-13 20:22:39,770 INFO L175 Difference]: Start difference. First operand has 405 places, 698 transitions, 10067 flow. Second operand 25 states and 171 transitions. [2025-04-13 20:22:39,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 760 transitions, 12460 flow [2025-04-13 20:22:40,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 760 transitions, 12050 flow, removed 64 selfloop flow, removed 21 redundant places. [2025-04-13 20:22:40,035 INFO L231 Difference]: Finished difference. Result has 409 places, 713 transitions, 10477 flow [2025-04-13 20:22:40,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9657, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10477, PETRI_PLACES=409, PETRI_TRANSITIONS=713} [2025-04-13 20:22:40,035 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 387 predicate places. [2025-04-13 20:22:40,036 INFO L485 AbstractCegarLoop]: Abstraction has has 409 places, 713 transitions, 10477 flow [2025-04-13 20:22:40,036 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:22:40,036 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:40,036 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:40,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-04-13 20:22:40,236 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:40,236 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 20:22:40,237 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1371714213, now seen corresponding path program 14 times [2025-04-13 20:22:40,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:40,237 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555188216] [2025-04-13 20:22:40,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:40,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:40,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:40,246 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:40,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:40,551 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 20:22:40,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:40,551 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555188216] [2025-04-13 20:22:40,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555188216] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:40,552 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287857479] [2025-04-13 20:22:40,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:40,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:40,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:40,553 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 20:22:40,554 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 20:22:40,619 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:40,633 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:40,633 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:40,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:40,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-04-13 20:22:40,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:40,779 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:40,780 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 17 treesize of output 14 [2025-04-13 20:22:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:40,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:40,920 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:40,920 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 21 treesize of output 14 [2025-04-13 20:22:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:40,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287857479] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:40,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:40,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 30 [2025-04-13 20:22:40,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213399205] [2025-04-13 20:22:40,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:40,959 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-04-13 20:22:40,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:40,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-04-13 20:22:40,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2025-04-13 20:22:40,960 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:40,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 713 transitions, 10477 flow. Second operand has 32 states, 32 states have (on average 3.53125) internal successors, (113), 32 states have internal predecessors, (113), 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 20:22:40,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:40,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:40,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:41,973 INFO L116 PetriNetUnfolderBase]: 1662/2883 cut-off events. [2025-04-13 20:22:41,973 INFO L117 PetriNetUnfolderBase]: For 47063/47063 co-relation queries the response was YES. [2025-04-13 20:22:41,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24136 conditions, 2883 events. 1662/2883 cut-off events. For 47063/47063 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 17192 event pairs, 101 based on Foata normal form. 1/2838 useless extension candidates. Maximal degree in co-relation 24019. Up to 2672 conditions per place. [2025-04-13 20:22:41,996 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 670 selfloop transitions, 106 changer transitions 5/781 dead transitions. [2025-04-13 20:22:41,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 781 transitions, 13076 flow [2025-04-13 20:22:41,997 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-13 20:22:41,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-13 20:22:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 166 transitions. [2025-04-13 20:22:41,997 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24887556221889057 [2025-04-13 20:22:41,997 INFO L175 Difference]: Start difference. First operand has 409 places, 713 transitions, 10477 flow. Second operand 29 states and 166 transitions. [2025-04-13 20:22:41,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 781 transitions, 13076 flow [2025-04-13 20:22:42,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 781 transitions, 12617 flow, removed 121 selfloop flow, removed 16 redundant places. [2025-04-13 20:22:42,233 INFO L231 Difference]: Finished difference. Result has 428 places, 748 transitions, 11173 flow [2025-04-13 20:22:42,233 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10018, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11173, PETRI_PLACES=428, PETRI_TRANSITIONS=748} [2025-04-13 20:22:42,233 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 406 predicate places. [2025-04-13 20:22:42,233 INFO L485 AbstractCegarLoop]: Abstraction has has 428 places, 748 transitions, 11173 flow [2025-04-13 20:22:42,233 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 32 states have internal predecessors, (113), 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 20:22:42,234 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:42,234 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:42,240 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 20:22:42,434 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:42,434 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 20:22:42,435 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:42,435 INFO L85 PathProgramCache]: Analyzing trace with hash 557337121, now seen corresponding path program 15 times [2025-04-13 20:22:42,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:42,435 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063847391] [2025-04-13 20:22:42,435 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:22:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:42,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:42,443 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:42,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:22:42,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:42,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:42,643 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063847391] [2025-04-13 20:22:42,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063847391] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:42,643 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641432008] [2025-04-13 20:22:42,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:22:42,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:42,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:42,645 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 20:22:42,646 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 20:22:42,685 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:42,699 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:42,700 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:22:42,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:42,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:22:42,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:42,736 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:22:42,974 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:42,974 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 17 treesize of output 14 [2025-04-13 20:22:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:42,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:43,345 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 36 treesize of output 32 [2025-04-13 20:22:43,352 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:43,352 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 62 [2025-04-13 20:22:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:43,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641432008] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:43,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:43,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 37 [2025-04-13 20:22:43,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269832660] [2025-04-13 20:22:43,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:43,428 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:22:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:43,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:22:43,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:22:43,429 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:43,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 748 transitions, 11173 flow. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:22:43,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:43,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:43,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:45,337 INFO L116 PetriNetUnfolderBase]: 1775/3090 cut-off events. [2025-04-13 20:22:45,338 INFO L117 PetriNetUnfolderBase]: For 59843/59843 co-relation queries the response was YES. [2025-04-13 20:22:45,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27058 conditions, 3090 events. 1775/3090 cut-off events. For 59843/59843 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 18733 event pairs, 115 based on Foata normal form. 3/3047 useless extension candidates. Maximal degree in co-relation 26934. Up to 2684 conditions per place. [2025-04-13 20:22:45,370 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 681 selfloop transitions, 165 changer transitions 10/856 dead transitions. [2025-04-13 20:22:45,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 856 transitions, 14610 flow [2025-04-13 20:22:45,371 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-04-13 20:22:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2025-04-13 20:22:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 252 transitions. [2025-04-13 20:22:45,371 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27391304347826084 [2025-04-13 20:22:45,371 INFO L175 Difference]: Start difference. First operand has 428 places, 748 transitions, 11173 flow. Second operand 40 states and 252 transitions. [2025-04-13 20:22:45,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 856 transitions, 14610 flow [2025-04-13 20:22:45,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 856 transitions, 13914 flow, removed 308 selfloop flow, removed 13 redundant places. [2025-04-13 20:22:45,702 INFO L231 Difference]: Finished difference. Result has 463 places, 789 transitions, 12184 flow [2025-04-13 20:22:45,702 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10479, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=12184, PETRI_PLACES=463, PETRI_TRANSITIONS=789} [2025-04-13 20:22:45,703 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 441 predicate places. [2025-04-13 20:22:45,703 INFO L485 AbstractCegarLoop]: Abstraction has has 463 places, 789 transitions, 12184 flow [2025-04-13 20:22:45,703 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:22:45,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:45,703 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:45,709 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 20:22:45,907 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:45,907 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:22:45,907 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2093875087, now seen corresponding path program 16 times [2025-04-13 20:22:45,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:45,908 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317469935] [2025-04-13 20:22:45,908 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:45,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:45,911 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:45,916 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 20:22:45,916 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:22:45,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:46,215 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 20:22:46,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:46,215 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317469935] [2025-04-13 20:22:46,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317469935] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:46,215 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79292268] [2025-04-13 20:22:46,215 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:22:46,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:46,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:46,217 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 20:22:46,217 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 20:22:46,261 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:46,275 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 20:22:46,275 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:22:46,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:46,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:22:46,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:46,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:46,464 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:46,464 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 42 treesize of output 45 [2025-04-13 20:22:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:46,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79292268] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:46,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:46,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 24 [2025-04-13 20:22:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750604553] [2025-04-13 20:22:46,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:46,503 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-13 20:22:46,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:46,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-13 20:22:46,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2025-04-13 20:22:46,503 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:46,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 789 transitions, 12184 flow. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 20:22:46,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:46,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:46,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:47,733 INFO L116 PetriNetUnfolderBase]: 1898/3287 cut-off events. [2025-04-13 20:22:47,733 INFO L117 PetriNetUnfolderBase]: For 73890/73890 co-relation queries the response was YES. [2025-04-13 20:22:47,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29811 conditions, 3287 events. 1898/3287 cut-off events. For 73890/73890 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 20062 event pairs, 131 based on Foata normal form. 1/3238 useless extension candidates. Maximal degree in co-relation 29677. Up to 2995 conditions per place. [2025-04-13 20:22:47,770 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 787 selfloop transitions, 105 changer transitions 1/893 dead transitions. [2025-04-13 20:22:47,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 893 transitions, 15646 flow [2025-04-13 20:22:47,771 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-13 20:22:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-13 20:22:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 207 transitions. [2025-04-13 20:22:47,771 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2025-04-13 20:22:47,771 INFO L175 Difference]: Start difference. First operand has 463 places, 789 transitions, 12184 flow. Second operand 31 states and 207 transitions. [2025-04-13 20:22:47,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 893 transitions, 15646 flow [2025-04-13 20:22:48,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 893 transitions, 14662 flow, removed 436 selfloop flow, removed 13 redundant places. [2025-04-13 20:22:48,230 INFO L231 Difference]: Finished difference. Result has 481 places, 842 transitions, 12700 flow [2025-04-13 20:22:48,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=11203, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=12700, PETRI_PLACES=481, PETRI_TRANSITIONS=842} [2025-04-13 20:22:48,231 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 459 predicate places. [2025-04-13 20:22:48,231 INFO L485 AbstractCegarLoop]: Abstraction has has 481 places, 842 transitions, 12700 flow [2025-04-13 20:22:48,231 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 20:22:48,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:48,231 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:48,237 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 20:22:48,431 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:48,432 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:22:48,432 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1307125301, now seen corresponding path program 17 times [2025-04-13 20:22:48,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:48,432 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737182223] [2025-04-13 20:22:48,432 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:48,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:48,436 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:48,441 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:48,441 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:48,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:48,742 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 20:22:48,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:48,742 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737182223] [2025-04-13 20:22:48,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737182223] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:48,742 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661834381] [2025-04-13 20:22:48,742 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:48,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:48,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:48,744 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 20:22:48,745 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 20:22:48,786 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:48,799 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:48,799 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:48,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:48,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:22:48,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:48,966 INFO L325 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2025-04-13 20:22:48,966 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 36 treesize of output 33 [2025-04-13 20:22:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:48,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661834381] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:49,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 23 [2025-04-13 20:22:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743419368] [2025-04-13 20:22:49,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:49,207 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 20:22:49,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:49,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 20:22:49,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2025-04-13 20:22:49,208 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:49,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 842 transitions, 12700 flow. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 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 20:22:49,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:49,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:49,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:50,303 INFO L116 PetriNetUnfolderBase]: 1945/3366 cut-off events. [2025-04-13 20:22:50,303 INFO L117 PetriNetUnfolderBase]: For 79721/79721 co-relation queries the response was YES. [2025-04-13 20:22:50,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30409 conditions, 3366 events. 1945/3366 cut-off events. For 79721/79721 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 20614 event pairs, 130 based on Foata normal form. 1/3315 useless extension candidates. Maximal degree in co-relation 30274. Up to 3189 conditions per place. [2025-04-13 20:22:50,334 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 803 selfloop transitions, 88 changer transitions 5/896 dead transitions. [2025-04-13 20:22:50,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 896 transitions, 15475 flow [2025-04-13 20:22:50,334 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 20:22:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 20:22:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 142 transitions. [2025-04-13 20:22:50,335 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2572463768115942 [2025-04-13 20:22:50,335 INFO L175 Difference]: Start difference. First operand has 481 places, 842 transitions, 12700 flow. Second operand 24 states and 142 transitions. [2025-04-13 20:22:50,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 896 transitions, 15475 flow [2025-04-13 20:22:50,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 896 transitions, 14850 flow, removed 292 selfloop flow, removed 9 redundant places. [2025-04-13 20:22:50,797 INFO L231 Difference]: Finished difference. Result has 502 places, 867 transitions, 13135 flow [2025-04-13 20:22:50,798 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12075, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=13135, PETRI_PLACES=502, PETRI_TRANSITIONS=867} [2025-04-13 20:22:50,798 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 480 predicate places. [2025-04-13 20:22:50,798 INFO L485 AbstractCegarLoop]: Abstraction has has 502 places, 867 transitions, 13135 flow [2025-04-13 20:22:50,798 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 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 20:22:50,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:50,798 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:50,804 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 20:22:50,999 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-04-13 20:22:50,999 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:22:50,999 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash -259504323, now seen corresponding path program 18 times [2025-04-13 20:22:51,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:51,000 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678612688] [2025-04-13 20:22:51,000 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:51,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:51,004 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:22:51,010 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:51,010 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:22:51,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:51,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:51,205 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678612688] [2025-04-13 20:22:51,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678612688] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:51,205 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615957614] [2025-04-13 20:22:51,205 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:51,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:51,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:51,206 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 20:22:51,207 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 20:22:51,247 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:22:51,259 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:51,259 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:22:51,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:51,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-13 20:22:51,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:51,360 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:51,360 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 15 treesize of output 14 [2025-04-13 20:22:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:51,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:51,459 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:51,460 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 21 treesize of output 14 [2025-04-13 20:22:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:51,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615957614] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:51,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:51,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 24 [2025-04-13 20:22:51,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402730129] [2025-04-13 20:22:51,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:51,535 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-13 20:22:51,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:51,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-13 20:22:51,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2025-04-13 20:22:51,535 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:51,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 867 transitions, 13135 flow. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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 20:22:51,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:51,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:51,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:52,976 INFO L116 PetriNetUnfolderBase]: 2040/3533 cut-off events. [2025-04-13 20:22:52,977 INFO L117 PetriNetUnfolderBase]: For 96278/96278 co-relation queries the response was YES. [2025-04-13 20:22:53,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33054 conditions, 3533 events. 2040/3533 cut-off events. For 96278/96278 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 21881 event pairs, 141 based on Foata normal form. 3/3480 useless extension candidates. Maximal degree in co-relation 32911. Up to 3231 conditions per place. [2025-04-13 20:22:53,016 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 821 selfloop transitions, 137 changer transitions 5/963 dead transitions. [2025-04-13 20:22:53,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 963 transitions, 17239 flow [2025-04-13 20:22:53,017 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 20:22:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 20:22:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 215 transitions. [2025-04-13 20:22:53,017 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2749360613810742 [2025-04-13 20:22:53,017 INFO L175 Difference]: Start difference. First operand has 502 places, 867 transitions, 13135 flow. Second operand 34 states and 215 transitions. [2025-04-13 20:22:53,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 963 transitions, 17239 flow [2025-04-13 20:22:53,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 963 transitions, 16433 flow, removed 357 selfloop flow, removed 10 redundant places. [2025-04-13 20:22:53,659 INFO L231 Difference]: Finished difference. Result has 526 places, 915 transitions, 14577 flow [2025-04-13 20:22:53,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12329, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=14577, PETRI_PLACES=526, PETRI_TRANSITIONS=915} [2025-04-13 20:22:53,660 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 504 predicate places. [2025-04-13 20:22:53,660 INFO L485 AbstractCegarLoop]: Abstraction has has 526 places, 915 transitions, 14577 flow [2025-04-13 20:22:53,661 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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 20:22:53,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:53,661 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:53,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-04-13 20:22:53,861 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,SelfDestructingSolverStorable36 [2025-04-13 20:22:53,861 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:22:53,862 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1224008411, now seen corresponding path program 19 times [2025-04-13 20:22:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:53,862 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118639314] [2025-04-13 20:22:53,862 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:22:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:53,867 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:22:53,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:53,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:53,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:22:54,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:54,155 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118639314] [2025-04-13 20:22:54,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118639314] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:54,155 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607859718] [2025-04-13 20:22:54,155 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:22:54,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:54,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:54,157 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 20:22:54,158 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 20:22:54,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:22:54,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:54,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:22:54,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:54,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:22:54,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:54,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:54,363 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:54,363 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 42 treesize of output 45 [2025-04-13 20:22:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:54,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607859718] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:54,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:54,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 24 [2025-04-13 20:22:54,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802255999] [2025-04-13 20:22:54,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:54,407 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-13 20:22:54,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:54,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-13 20:22:54,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2025-04-13 20:22:54,408 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:54,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 915 transitions, 14577 flow. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 20:22:54,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:54,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:54,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:55,672 INFO L116 PetriNetUnfolderBase]: 2124/3678 cut-off events. [2025-04-13 20:22:55,672 INFO L117 PetriNetUnfolderBase]: For 109862/109862 co-relation queries the response was YES. [2025-04-13 20:22:55,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34955 conditions, 3678 events. 2124/3678 cut-off events. For 109862/109862 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 22900 event pairs, 163 based on Foata normal form. 2/3614 useless extension candidates. Maximal degree in co-relation 34811. Up to 3351 conditions per place. [2025-04-13 20:22:55,704 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 857 selfloop transitions, 118 changer transitions 3/978 dead transitions. [2025-04-13 20:22:55,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 978 transitions, 17557 flow [2025-04-13 20:22:55,705 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:22:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:22:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 155 transitions. [2025-04-13 20:22:55,705 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.30632411067193677 [2025-04-13 20:22:55,705 INFO L175 Difference]: Start difference. First operand has 526 places, 915 transitions, 14577 flow. Second operand 22 states and 155 transitions. [2025-04-13 20:22:55,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 978 transitions, 17557 flow [2025-04-13 20:22:56,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 978 transitions, 15813 flow, removed 802 selfloop flow, removed 16 redundant places. [2025-04-13 20:22:56,330 INFO L231 Difference]: Finished difference. Result has 535 places, 930 transitions, 13626 flow [2025-04-13 20:22:56,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12841, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=915, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13626, PETRI_PLACES=535, PETRI_TRANSITIONS=930} [2025-04-13 20:22:56,331 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 513 predicate places. [2025-04-13 20:22:56,331 INFO L485 AbstractCegarLoop]: Abstraction has has 535 places, 930 transitions, 13626 flow [2025-04-13 20:22:56,332 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 20:22:56,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:56,332 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:56,339 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 20:22:56,536 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-04-13 20:22:56,536 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:22:56,536 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1395679327, now seen corresponding path program 20 times [2025-04-13 20:22:56,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:56,536 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163504587] [2025-04-13 20:22:56,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:56,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:56,540 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:56,544 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:56,544 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:56,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:22:56,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:56,713 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163504587] [2025-04-13 20:22:56,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163504587] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:56,713 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047852256] [2025-04-13 20:22:56,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:22:56,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:56,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:56,714 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 20:22:56,715 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 20:22:56,755 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:22:56,768 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:22:56,768 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:56,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:56,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:22:56,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:56,802 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:22:56,999 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:56,999 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 17 treesize of output 14 [2025-04-13 20:22:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:57,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:57,355 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 36 treesize of output 32 [2025-04-13 20:22:57,361 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:22:57,361 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 66 [2025-04-13 20:22:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:57,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047852256] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:57,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:57,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 37 [2025-04-13 20:22:57,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456819624] [2025-04-13 20:22:57,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:57,473 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:22:57,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:57,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:22:57,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:22:57,474 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:22:57,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 930 transitions, 13626 flow. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:22:57,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:57,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:22:57,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:59,423 INFO L116 PetriNetUnfolderBase]: 2215/3848 cut-off events. [2025-04-13 20:22:59,423 INFO L117 PetriNetUnfolderBase]: For 110242/110242 co-relation queries the response was YES. [2025-04-13 20:22:59,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36124 conditions, 3848 events. 2215/3848 cut-off events. For 110242/110242 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24118 event pairs, 175 based on Foata normal form. 3/3777 useless extension candidates. Maximal degree in co-relation 35978. Up to 3458 conditions per place. [2025-04-13 20:22:59,464 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 852 selfloop transitions, 155 changer transitions 10/1017 dead transitions. [2025-04-13 20:22:59,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1017 transitions, 17556 flow [2025-04-13 20:22:59,464 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:22:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:22:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 224 transitions. [2025-04-13 20:22:59,465 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27053140096618356 [2025-04-13 20:22:59,465 INFO L175 Difference]: Start difference. First operand has 535 places, 930 transitions, 13626 flow. Second operand 36 states and 224 transitions. [2025-04-13 20:22:59,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1017 transitions, 17556 flow [2025-04-13 20:23:00,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1017 transitions, 17218 flow, removed 128 selfloop flow, removed 13 redundant places. [2025-04-13 20:23:00,311 INFO L231 Difference]: Finished difference. Result has 568 places, 960 transitions, 14993 flow [2025-04-13 20:23:00,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13288, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14993, PETRI_PLACES=568, PETRI_TRANSITIONS=960} [2025-04-13 20:23:00,312 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 546 predicate places. [2025-04-13 20:23:00,312 INFO L485 AbstractCegarLoop]: Abstraction has has 568 places, 960 transitions, 14993 flow [2025-04-13 20:23:00,312 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:23:00,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:00,312 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:00,318 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 20:23:00,512 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-04-13 20:23:00,513 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:00,513 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1235830277, now seen corresponding path program 21 times [2025-04-13 20:23:00,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:00,513 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014266032] [2025-04-13 20:23:00,513 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:23:00,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:00,517 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:00,524 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:00,524 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:23:00,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:00,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:00,661 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014266032] [2025-04-13 20:23:00,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014266032] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:00,661 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485866686] [2025-04-13 20:23:00,661 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:23:00,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:00,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:00,662 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 20:23:00,663 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 20:23:00,704 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:00,716 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:00,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:23:00,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:00,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:23:00,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:00,743 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:23:00,874 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:00,874 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 17 treesize of output 14 [2025-04-13 20:23:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:00,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:01,198 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 36 treesize of output 32 [2025-04-13 20:23:01,203 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:01,203 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 66 [2025-04-13 20:23:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:01,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485866686] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:01,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:01,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 34 [2025-04-13 20:23:01,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48590319] [2025-04-13 20:23:01,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:01,271 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-04-13 20:23:01,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:01,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-04-13 20:23:01,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2025-04-13 20:23:01,272 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:01,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 960 transitions, 14993 flow. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 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 20:23:01,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:01,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:01,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:03,045 INFO L116 PetriNetUnfolderBase]: 2273/3948 cut-off events. [2025-04-13 20:23:03,045 INFO L117 PetriNetUnfolderBase]: For 133390/133390 co-relation queries the response was YES. [2025-04-13 20:23:03,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38797 conditions, 3948 events. 2273/3948 cut-off events. For 133390/133390 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 24837 event pairs, 163 based on Foata normal form. 3/3879 useless extension candidates. Maximal degree in co-relation 38639. Up to 3537 conditions per place. [2025-04-13 20:23:03,085 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 834 selfloop transitions, 188 changer transitions 10/1032 dead transitions. [2025-04-13 20:23:03,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1032 transitions, 18281 flow [2025-04-13 20:23:03,085 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-13 20:23:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-04-13 20:23:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 219 transitions. [2025-04-13 20:23:03,086 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2885375494071146 [2025-04-13 20:23:03,086 INFO L175 Difference]: Start difference. First operand has 568 places, 960 transitions, 14993 flow. Second operand 33 states and 219 transitions. [2025-04-13 20:23:03,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1032 transitions, 18281 flow [2025-04-13 20:23:03,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1032 transitions, 17421 flow, removed 380 selfloop flow, removed 13 redundant places. [2025-04-13 20:23:03,940 INFO L231 Difference]: Finished difference. Result has 590 places, 984 transitions, 15532 flow [2025-04-13 20:23:03,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14130, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=15532, PETRI_PLACES=590, PETRI_TRANSITIONS=984} [2025-04-13 20:23:03,941 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 568 predicate places. [2025-04-13 20:23:03,941 INFO L485 AbstractCegarLoop]: Abstraction has has 590 places, 984 transitions, 15532 flow [2025-04-13 20:23:03,941 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 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 20:23:03,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:03,941 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:03,947 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 20:23:04,142 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-04-13 20:23:04,142 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:04,142 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1103685247, now seen corresponding path program 22 times [2025-04-13 20:23:04,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:04,143 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715663373] [2025-04-13 20:23:04,143 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:23:04,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:04,146 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:04,150 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 20:23:04,150 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:23:04,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:04,418 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 20:23:04,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:04,418 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715663373] [2025-04-13 20:23:04,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715663373] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:04,418 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721873219] [2025-04-13 20:23:04,418 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:23:04,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:04,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:04,420 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:04,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-04-13 20:23:04,462 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:04,474 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 20:23:04,474 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:23:04,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:04,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:23:04,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:04,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:04,658 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:04,659 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 42 treesize of output 45 [2025-04-13 20:23:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:04,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721873219] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:04,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:04,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2025-04-13 20:23:04,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399448745] [2025-04-13 20:23:04,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:04,698 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-13 20:23:04,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:04,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-13 20:23:04,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2025-04-13 20:23:04,698 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:04,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 984 transitions, 15532 flow. Second operand has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 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 20:23:04,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:04,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:04,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:06,202 INFO L116 PetriNetUnfolderBase]: 2395/4144 cut-off events. [2025-04-13 20:23:06,202 INFO L117 PetriNetUnfolderBase]: For 163915/163915 co-relation queries the response was YES. [2025-04-13 20:23:06,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42659 conditions, 4144 events. 2395/4144 cut-off events. For 163915/163915 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 26222 event pairs, 197 based on Foata normal form. 2/4074 useless extension candidates. Maximal degree in co-relation 42496. Up to 3789 conditions per place. [2025-04-13 20:23:06,250 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 922 selfloop transitions, 138 changer transitions 3/1063 dead transitions. [2025-04-13 20:23:06,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1063 transitions, 19885 flow [2025-04-13 20:23:06,250 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-13 20:23:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-13 20:23:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 165 transitions. [2025-04-13 20:23:06,251 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27591973244147155 [2025-04-13 20:23:06,251 INFO L175 Difference]: Start difference. First operand has 590 places, 984 transitions, 15532 flow. Second operand 26 states and 165 transitions. [2025-04-13 20:23:06,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1063 transitions, 19885 flow [2025-04-13 20:23:07,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1063 transitions, 19064 flow, removed 363 selfloop flow, removed 13 redundant places. [2025-04-13 20:23:07,512 INFO L231 Difference]: Finished difference. Result has 606 places, 1020 transitions, 16682 flow [2025-04-13 20:23:07,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=14791, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16682, PETRI_PLACES=606, PETRI_TRANSITIONS=1020} [2025-04-13 20:23:07,513 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 584 predicate places. [2025-04-13 20:23:07,513 INFO L485 AbstractCegarLoop]: Abstraction has has 606 places, 1020 transitions, 16682 flow [2025-04-13 20:23:07,513 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 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 20:23:07,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:07,513 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:07,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-04-13 20:23:07,714 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2025-04-13 20:23:07,714 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:07,714 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash 910340483, now seen corresponding path program 23 times [2025-04-13 20:23:07,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:07,715 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202908634] [2025-04-13 20:23:07,715 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:23:07,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:07,718 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:07,722 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:07,722 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:23:07,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:07,992 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 20:23:07,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:07,992 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202908634] [2025-04-13 20:23:07,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202908634] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:07,992 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144606320] [2025-04-13 20:23:07,992 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:23:07,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:07,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:07,994 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:07,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-04-13 20:23:08,037 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:08,051 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:08,051 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:23:08,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:08,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:23:08,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:08,164 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:08,164 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 35 treesize of output 41 [2025-04-13 20:23:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:08,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:08,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144606320] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:08,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:08,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 22 [2025-04-13 20:23:08,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071010347] [2025-04-13 20:23:08,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:08,279 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-13 20:23:08,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:08,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-13 20:23:08,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2025-04-13 20:23:08,279 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:08,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1020 transitions, 16682 flow. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 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 20:23:08,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:08,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:08,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:10,231 INFO L116 PetriNetUnfolderBase]: 2481/4313 cut-off events. [2025-04-13 20:23:10,231 INFO L117 PetriNetUnfolderBase]: For 183250/183250 co-relation queries the response was YES. [2025-04-13 20:23:10,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45029 conditions, 4313 events. 2481/4313 cut-off events. For 183250/183250 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27619 event pairs, 185 based on Foata normal form. 2/4235 useless extension candidates. Maximal degree in co-relation 44860. Up to 3827 conditions per place. [2025-04-13 20:23:10,281 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 884 selfloop transitions, 228 changer transitions 4/1116 dead transitions. [2025-04-13 20:23:10,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 1116 transitions, 20403 flow [2025-04-13 20:23:10,282 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 20:23:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 20:23:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 209 transitions. [2025-04-13 20:23:10,282 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2672634271099744 [2025-04-13 20:23:10,282 INFO L175 Difference]: Start difference. First operand has 606 places, 1020 transitions, 16682 flow. Second operand 34 states and 209 transitions. [2025-04-13 20:23:10,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 1116 transitions, 20403 flow [2025-04-13 20:23:11,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1116 transitions, 19210 flow, removed 518 selfloop flow, removed 15 redundant places. [2025-04-13 20:23:11,529 INFO L231 Difference]: Finished difference. Result has 634 places, 1070 transitions, 17442 flow [2025-04-13 20:23:11,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=15589, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=805, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=17442, PETRI_PLACES=634, PETRI_TRANSITIONS=1070} [2025-04-13 20:23:11,529 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 612 predicate places. [2025-04-13 20:23:11,529 INFO L485 AbstractCegarLoop]: Abstraction has has 634 places, 1070 transitions, 17442 flow [2025-04-13 20:23:11,529 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 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 20:23:11,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:11,530 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:11,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-04-13 20:23:11,730 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:11,730 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:11,730 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:11,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1484957583, now seen corresponding path program 24 times [2025-04-13 20:23:11,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:11,731 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435120467] [2025-04-13 20:23:11,731 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:23:11,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:11,735 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:11,740 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:11,741 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:23:11,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:11,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:11,954 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435120467] [2025-04-13 20:23:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435120467] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:11,954 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515391477] [2025-04-13 20:23:11,954 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:23:11,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:11,956 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:11,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-04-13 20:23:12,052 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:12,066 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:12,067 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:23:12,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:12,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-04-13 20:23:12,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:12,259 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:12,260 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 17 treesize of output 14 [2025-04-13 20:23:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:12,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:12,457 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:12,457 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 41 treesize of output 63 [2025-04-13 20:23:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:12,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515391477] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:12,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:12,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2025-04-13 20:23:12,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084982755] [2025-04-13 20:23:12,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:12,770 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-04-13 20:23:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:12,771 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-04-13 20:23:12,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2025-04-13 20:23:12,771 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:12,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1070 transitions, 17442 flow. Second operand has 36 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 36 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 20:23:12,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:12,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:12,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:14,677 INFO L116 PetriNetUnfolderBase]: 2504/4360 cut-off events. [2025-04-13 20:23:14,677 INFO L117 PetriNetUnfolderBase]: For 192274/192274 co-relation queries the response was YES. [2025-04-13 20:23:14,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45719 conditions, 4360 events. 2504/4360 cut-off events. For 192274/192274 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28039 event pairs, 197 based on Foata normal form. 1/4299 useless extension candidates. Maximal degree in co-relation 45539. Up to 3969 conditions per place. [2025-04-13 20:23:14,730 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 939 selfloop transitions, 187 changer transitions 8/1134 dead transitions. [2025-04-13 20:23:14,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 1134 transitions, 20588 flow [2025-04-13 20:23:14,730 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-13 20:23:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-13 20:23:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 186 transitions. [2025-04-13 20:23:14,731 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2608695652173913 [2025-04-13 20:23:14,731 INFO L175 Difference]: Start difference. First operand has 634 places, 1070 transitions, 17442 flow. Second operand 31 states and 186 transitions. [2025-04-13 20:23:14,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 1134 transitions, 20588 flow [2025-04-13 20:23:16,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 1134 transitions, 19894 flow, removed 209 selfloop flow, removed 27 redundant places. [2025-04-13 20:23:16,337 INFO L231 Difference]: Finished difference. Result has 645 places, 1094 transitions, 17911 flow [2025-04-13 20:23:16,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=16748, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17911, PETRI_PLACES=645, PETRI_TRANSITIONS=1094} [2025-04-13 20:23:16,338 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 623 predicate places. [2025-04-13 20:23:16,338 INFO L485 AbstractCegarLoop]: Abstraction has has 645 places, 1094 transitions, 17911 flow [2025-04-13 20:23:16,338 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 36 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 20:23:16,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:16,338 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:16,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-04-13 20:23:16,538 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:16,539 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:16,539 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1154779839, now seen corresponding path program 25 times [2025-04-13 20:23:16,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:16,539 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491463378] [2025-04-13 20:23:16,539 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:23:16,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:16,543 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:23:16,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:16,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:23:16,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:16,821 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 20:23:16,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:16,821 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491463378] [2025-04-13 20:23:16,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491463378] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:16,821 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68618401] [2025-04-13 20:23:16,821 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:23:16,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:16,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:16,823 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:16,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-04-13 20:23:16,866 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:23:16,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:16,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:23:16,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:16,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:23:16,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:16,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:17,071 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:17,071 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 42 treesize of output 45 [2025-04-13 20:23:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68618401] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:17,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:17,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:23:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878726294] [2025-04-13 20:23:17,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:17,128 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:23:17,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:17,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:23:17,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:23:17,129 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:17,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1094 transitions, 17911 flow. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:23:17,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:17,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:17,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:18,876 INFO L116 PetriNetUnfolderBase]: 2516/4377 cut-off events. [2025-04-13 20:23:18,876 INFO L117 PetriNetUnfolderBase]: For 206139/206139 co-relation queries the response was YES. [2025-04-13 20:23:18,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46647 conditions, 4377 events. 2516/4377 cut-off events. For 206139/206139 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 28163 event pairs, 208 based on Foata normal form. 1/4320 useless extension candidates. Maximal degree in co-relation 46462. Up to 4139 conditions per place. [2025-04-13 20:23:18,928 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1034 selfloop transitions, 88 changer transitions 4/1126 dead transitions. [2025-04-13 20:23:18,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1126 transitions, 20835 flow [2025-04-13 20:23:18,928 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-13 20:23:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-13 20:23:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 117 transitions. [2025-04-13 20:23:18,929 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29923273657289 [2025-04-13 20:23:18,929 INFO L175 Difference]: Start difference. First operand has 645 places, 1094 transitions, 17911 flow. Second operand 17 states and 117 transitions. [2025-04-13 20:23:18,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1126 transitions, 20835 flow [2025-04-13 20:23:20,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 1126 transitions, 20151 flow, removed 269 selfloop flow, removed 19 redundant places. [2025-04-13 20:23:20,510 INFO L231 Difference]: Finished difference. Result has 643 places, 1100 transitions, 17772 flow [2025-04-13 20:23:20,512 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=17227, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=17772, PETRI_PLACES=643, PETRI_TRANSITIONS=1100} [2025-04-13 20:23:20,527 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 621 predicate places. [2025-04-13 20:23:20,527 INFO L485 AbstractCegarLoop]: Abstraction has has 643 places, 1100 transitions, 17772 flow [2025-04-13 20:23:20,527 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:23:20,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:20,527 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:20,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-04-13 20:23:20,728 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2025-04-13 20:23:20,728 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:20,729 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:20,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1022632581, now seen corresponding path program 26 times [2025-04-13 20:23:20,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:20,729 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985670800] [2025-04-13 20:23:20,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:23:20,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:20,734 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:20,744 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:20,744 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:23:20,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:21,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:21,101 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985670800] [2025-04-13 20:23:21,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985670800] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:21,101 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355780797] [2025-04-13 20:23:21,101 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:23:21,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:21,103 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:21,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-04-13 20:23:21,151 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:21,165 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:21,165 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:23:21,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:21,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:23:21,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:21,206 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:23:21,404 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:21,404 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 17 treesize of output 14 [2025-04-13 20:23:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:21,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:21,794 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 36 treesize of output 32 [2025-04-13 20:23:21,799 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:21,799 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 78 treesize of output 62 [2025-04-13 20:23:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355780797] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:21,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:21,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2025-04-13 20:23:21,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124771627] [2025-04-13 20:23:21,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:21,888 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:23:21,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:21,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:23:21,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:23:21,889 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:21,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 1100 transitions, 17772 flow. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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 20:23:21,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:21,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:21,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:24,262 INFO L116 PetriNetUnfolderBase]: 2568/4476 cut-off events. [2025-04-13 20:23:24,263 INFO L117 PetriNetUnfolderBase]: For 214570/214570 co-relation queries the response was YES. [2025-04-13 20:23:24,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48112 conditions, 4476 events. 2568/4476 cut-off events. For 214570/214570 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29004 event pairs, 197 based on Foata normal form. 1/4417 useless extension candidates. Maximal degree in co-relation 47926. Up to 4045 conditions per place. [2025-04-13 20:23:24,307 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 970 selfloop transitions, 202 changer transitions 5/1177 dead transitions. [2025-04-13 20:23:24,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 1177 transitions, 21605 flow [2025-04-13 20:23:24,307 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-04-13 20:23:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-04-13 20:23:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 224 transitions. [2025-04-13 20:23:24,308 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2562929061784897 [2025-04-13 20:23:24,308 INFO L175 Difference]: Start difference. First operand has 643 places, 1100 transitions, 17772 flow. Second operand 38 states and 224 transitions. [2025-04-13 20:23:24,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 1177 transitions, 21605 flow [2025-04-13 20:23:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 1177 transitions, 21258 flow, removed 139 selfloop flow, removed 9 redundant places. [2025-04-13 20:23:25,811 INFO L231 Difference]: Finished difference. Result has 678 places, 1129 transitions, 19233 flow [2025-04-13 20:23:25,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=17425, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=19233, PETRI_PLACES=678, PETRI_TRANSITIONS=1129} [2025-04-13 20:23:25,811 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 656 predicate places. [2025-04-13 20:23:25,811 INFO L485 AbstractCegarLoop]: Abstraction has has 678 places, 1129 transitions, 19233 flow [2025-04-13 20:23:25,812 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 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 20:23:25,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:25,812 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:25,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-04-13 20:23:26,012 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:26,012 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:26,012 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -148297255, now seen corresponding path program 27 times [2025-04-13 20:23:26,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:26,013 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604515225] [2025-04-13 20:23:26,013 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:23:26,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:26,016 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:26,020 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:26,020 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:23:26,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:26,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:26,167 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604515225] [2025-04-13 20:23:26,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604515225] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:26,167 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690531906] [2025-04-13 20:23:26,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:23:26,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:26,169 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:26,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-04-13 20:23:26,214 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:26,226 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:26,226 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:23:26,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:26,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:23:26,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:26,255 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:23:26,403 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:26,404 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 17 treesize of output 14 [2025-04-13 20:23:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:26,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:26,910 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 36 treesize of output 32 [2025-04-13 20:23:26,916 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:26,916 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 66 [2025-04-13 20:23:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:27,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690531906] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:27,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:27,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 36 [2025-04-13 20:23:27,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292906320] [2025-04-13 20:23:27,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:27,017 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-04-13 20:23:27,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:27,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-04-13 20:23:27,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2025-04-13 20:23:27,018 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:27,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 1129 transitions, 19233 flow. Second operand has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 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 20:23:27,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:27,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:27,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:29,319 INFO L116 PetriNetUnfolderBase]: 2691/4692 cut-off events. [2025-04-13 20:23:29,319 INFO L117 PetriNetUnfolderBase]: For 262689/262689 co-relation queries the response was YES. [2025-04-13 20:23:29,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53494 conditions, 4692 events. 2691/4692 cut-off events. For 262689/262689 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 30695 event pairs, 195 based on Foata normal form. 2/4632 useless extension candidates. Maximal degree in co-relation 53301. Up to 4083 conditions per place. [2025-04-13 20:23:29,476 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 964 selfloop transitions, 268 changer transitions 9/1241 dead transitions. [2025-04-13 20:23:29,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 1241 transitions, 24771 flow [2025-04-13 20:23:29,476 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-04-13 20:23:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-04-13 20:23:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 264 transitions. [2025-04-13 20:23:29,477 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2799575821845175 [2025-04-13 20:23:29,477 INFO L175 Difference]: Start difference. First operand has 678 places, 1129 transitions, 19233 flow. Second operand 41 states and 264 transitions. [2025-04-13 20:23:29,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 1241 transitions, 24771 flow [2025-04-13 20:23:31,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 1241 transitions, 23416 flow, removed 585 selfloop flow, removed 24 redundant places. [2025-04-13 20:23:31,357 INFO L231 Difference]: Finished difference. Result has 699 places, 1181 transitions, 21308 flow [2025-04-13 20:23:31,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=17998, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=890, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21308, PETRI_PLACES=699, PETRI_TRANSITIONS=1181} [2025-04-13 20:23:31,358 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 677 predicate places. [2025-04-13 20:23:31,358 INFO L485 AbstractCegarLoop]: Abstraction has has 699 places, 1181 transitions, 21308 flow [2025-04-13 20:23:31,358 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.473684210526316) internal successors, (132), 38 states have internal predecessors, (132), 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 20:23:31,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:31,358 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:31,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-04-13 20:23:31,559 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2025-04-13 20:23:31,559 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:31,560 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:31,560 INFO L85 PathProgramCache]: Analyzing trace with hash -144423251, now seen corresponding path program 28 times [2025-04-13 20:23:31,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:31,560 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920333451] [2025-04-13 20:23:31,560 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:23:31,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:31,564 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:31,568 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 20:23:31,568 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:23:31,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:31,924 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 20:23:31,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:31,924 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920333451] [2025-04-13 20:23:31,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920333451] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:31,924 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086876824] [2025-04-13 20:23:31,924 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:23:31,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:31,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:31,926 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:31,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-04-13 20:23:31,971 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:31,983 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 20:23:31,983 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:23:31,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:31,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:23:31,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:32,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:32,210 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:32,210 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 42 treesize of output 45 [2025-04-13 20:23:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086876824] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:32,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:32,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:23:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653258048] [2025-04-13 20:23:32,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:32,259 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:23:32,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:32,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:23:32,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:23:32,259 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:32,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 699 places, 1181 transitions, 21308 flow. Second operand has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:23:32,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:32,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:32,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:34,443 INFO L116 PetriNetUnfolderBase]: 2792/4870 cut-off events. [2025-04-13 20:23:34,444 INFO L117 PetriNetUnfolderBase]: For 263285/263285 co-relation queries the response was YES. [2025-04-13 20:23:34,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55972 conditions, 4870 events. 2792/4870 cut-off events. For 263285/263285 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 32056 event pairs, 220 based on Foata normal form. 2/4816 useless extension candidates. Maximal degree in co-relation 55773. Up to 4532 conditions per place. [2025-04-13 20:23:34,609 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1148 selfloop transitions, 130 changer transitions 2/1280 dead transitions. [2025-04-13 20:23:34,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 1280 transitions, 26159 flow [2025-04-13 20:23:34,610 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-13 20:23:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-13 20:23:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 200 transitions. [2025-04-13 20:23:34,610 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2717391304347826 [2025-04-13 20:23:34,610 INFO L175 Difference]: Start difference. First operand has 699 places, 1181 transitions, 21308 flow. Second operand 32 states and 200 transitions. [2025-04-13 20:23:34,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 1280 transitions, 26159 flow [2025-04-13 20:23:36,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 1280 transitions, 24347 flow, removed 830 selfloop flow, removed 20 redundant places. [2025-04-13 20:23:36,488 INFO L231 Difference]: Finished difference. Result has 714 places, 1229 transitions, 21581 flow [2025-04-13 20:23:36,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=19518, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1069, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21581, PETRI_PLACES=714, PETRI_TRANSITIONS=1229} [2025-04-13 20:23:36,489 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 692 predicate places. [2025-04-13 20:23:36,490 INFO L485 AbstractCegarLoop]: Abstraction has has 714 places, 1229 transitions, 21581 flow [2025-04-13 20:23:36,490 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:23:36,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:36,490 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:36,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-04-13 20:23:36,690 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:36,690 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:36,691 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:36,691 INFO L85 PathProgramCache]: Analyzing trace with hash -225013885, now seen corresponding path program 29 times [2025-04-13 20:23:36,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:36,691 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090040943] [2025-04-13 20:23:36,691 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:23:36,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:36,695 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:36,700 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:36,700 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:23:36,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:37,007 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 20:23:37,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:37,007 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090040943] [2025-04-13 20:23:37,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090040943] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:37,007 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143730518] [2025-04-13 20:23:37,007 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:23:37,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:37,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:37,009 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:37,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-04-13 20:23:37,054 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:37,067 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:37,067 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:23:37,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:37,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:23:37,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:37,213 INFO L325 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2025-04-13 20:23:37,213 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 36 treesize of output 33 [2025-04-13 20:23:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:37,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:37,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143730518] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:37,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:37,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 22 [2025-04-13 20:23:37,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204398207] [2025-04-13 20:23:37,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:37,310 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-13 20:23:37,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:37,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-13 20:23:37,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2025-04-13 20:23:37,310 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:37,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 1229 transitions, 21581 flow. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 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 20:23:37,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:37,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:37,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:39,479 INFO L116 PetriNetUnfolderBase]: 2835/4947 cut-off events. [2025-04-13 20:23:39,479 INFO L117 PetriNetUnfolderBase]: For 249843/249843 co-relation queries the response was YES. [2025-04-13 20:23:39,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55101 conditions, 4947 events. 2835/4947 cut-off events. For 249843/249843 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 32808 event pairs, 215 based on Foata normal form. 2/4893 useless extension candidates. Maximal degree in co-relation 54897. Up to 4680 conditions per place. [2025-04-13 20:23:39,534 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1150 selfloop transitions, 138 changer transitions 4/1292 dead transitions. [2025-04-13 20:23:39,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 1292 transitions, 25414 flow [2025-04-13 20:23:39,534 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-13 20:23:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-13 20:23:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 162 transitions. [2025-04-13 20:23:39,535 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2608695652173913 [2025-04-13 20:23:39,535 INFO L175 Difference]: Start difference. First operand has 714 places, 1229 transitions, 21581 flow. Second operand 27 states and 162 transitions. [2025-04-13 20:23:39,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 1292 transitions, 25414 flow [2025-04-13 20:23:41,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 723 places, 1292 transitions, 24535 flow, removed 395 selfloop flow, removed 17 redundant places. [2025-04-13 20:23:41,468 INFO L231 Difference]: Finished difference. Result has 730 places, 1259 transitions, 22163 flow [2025-04-13 20:23:41,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=20702, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22163, PETRI_PLACES=730, PETRI_TRANSITIONS=1259} [2025-04-13 20:23:41,469 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 708 predicate places. [2025-04-13 20:23:41,470 INFO L485 AbstractCegarLoop]: Abstraction has has 730 places, 1259 transitions, 22163 flow [2025-04-13 20:23:41,470 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 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 20:23:41,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:41,470 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:41,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2025-04-13 20:23:41,670 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2025-04-13 20:23:41,671 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:41,671 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash 510221535, now seen corresponding path program 30 times [2025-04-13 20:23:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:41,672 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874911195] [2025-04-13 20:23:41,672 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:23:41,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:41,677 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:41,686 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:41,686 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:23:41,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:41,975 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874911195] [2025-04-13 20:23:41,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874911195] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:41,975 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100695749] [2025-04-13 20:23:41,975 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:23:41,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:41,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:41,977 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:41,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-04-13 20:23:42,029 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:42,044 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:42,044 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:23:42,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:42,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:23:42,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:42,084 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:23:42,296 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:42,296 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 17 treesize of output 14 [2025-04-13 20:23:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:42,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:42,605 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 36 treesize of output 32 [2025-04-13 20:23:42,611 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:42,611 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 66 [2025-04-13 20:23:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100695749] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:42,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:42,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 37 [2025-04-13 20:23:42,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635055756] [2025-04-13 20:23:42,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:42,712 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:23:42,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:42,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:23:42,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:23:42,712 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:42,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 1259 transitions, 22163 flow. Second operand has 39 states, 39 states have (on average 3.41025641025641) internal successors, (133), 39 states have internal predecessors, (133), 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 20:23:42,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:42,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:42,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:45,178 INFO L116 PetriNetUnfolderBase]: 2831/4934 cut-off events. [2025-04-13 20:23:45,178 INFO L117 PetriNetUnfolderBase]: For 257062/257062 co-relation queries the response was YES. [2025-04-13 20:23:45,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55049 conditions, 4934 events. 2831/4934 cut-off events. For 257062/257062 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 32636 event pairs, 213 based on Foata normal form. 1/4879 useless extension candidates. Maximal degree in co-relation 54838. Up to 4521 conditions per place. [2025-04-13 20:23:45,239 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1096 selfloop transitions, 198 changer transitions 5/1299 dead transitions. [2025-04-13 20:23:45,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 1299 transitions, 24884 flow [2025-04-13 20:23:45,240 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 20:23:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 20:23:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 195 transitions. [2025-04-13 20:23:45,240 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24936061381074168 [2025-04-13 20:23:45,240 INFO L175 Difference]: Start difference. First operand has 730 places, 1259 transitions, 22163 flow. Second operand 34 states and 195 transitions. [2025-04-13 20:23:45,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 1299 transitions, 24884 flow [2025-04-13 20:23:47,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 1299 transitions, 23971 flow, removed 390 selfloop flow, removed 15 redundant places. [2025-04-13 20:23:47,433 INFO L231 Difference]: Finished difference. Result has 749 places, 1260 transitions, 21672 flow [2025-04-13 20:23:47,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=21239, PETRI_DIFFERENCE_MINUEND_PLACES=714, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1060, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=21672, PETRI_PLACES=749, PETRI_TRANSITIONS=1260} [2025-04-13 20:23:47,434 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 727 predicate places. [2025-04-13 20:23:47,434 INFO L485 AbstractCegarLoop]: Abstraction has has 749 places, 1260 transitions, 21672 flow [2025-04-13 20:23:47,434 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.41025641025641) internal successors, (133), 39 states have internal predecessors, (133), 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 20:23:47,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:47,434 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:47,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2025-04-13 20:23:47,639 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2025-04-13 20:23:47,639 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:47,639 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1753680327, now seen corresponding path program 31 times [2025-04-13 20:23:47,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:47,640 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161923225] [2025-04-13 20:23:47,640 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:23:47,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:47,644 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:23:47,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:47,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:23:47,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:23:47,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:47,927 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161923225] [2025-04-13 20:23:47,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161923225] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:47,928 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788478877] [2025-04-13 20:23:47,928 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:23:47,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:47,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:47,935 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:47,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-04-13 20:23:47,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:23:47,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:47,994 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:23:47,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:47,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:23:47,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:48,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:48,198 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:48,199 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 35 treesize of output 43 [2025-04-13 20:23:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:48,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788478877] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:48,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:48,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:23:48,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959586954] [2025-04-13 20:23:48,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:48,225 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:23:48,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:48,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:23:48,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:23:48,226 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:48,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 1260 transitions, 21672 flow. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:23:48,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:48,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:48,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:50,416 INFO L116 PetriNetUnfolderBase]: 2922/5077 cut-off events. [2025-04-13 20:23:50,416 INFO L117 PetriNetUnfolderBase]: For 272598/272598 co-relation queries the response was YES. [2025-04-13 20:23:50,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58063 conditions, 5077 events. 2922/5077 cut-off events. For 272598/272598 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 33667 event pairs, 232 based on Foata normal form. 1/5020 useless extension candidates. Maximal degree in co-relation 57853. Up to 4819 conditions per place. [2025-04-13 20:23:50,475 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1211 selfloop transitions, 116 changer transitions 1/1328 dead transitions. [2025-04-13 20:23:50,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 1328 transitions, 26626 flow [2025-04-13 20:23:50,476 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-13 20:23:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-13 20:23:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 156 transitions. [2025-04-13 20:23:50,476 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.271304347826087 [2025-04-13 20:23:50,476 INFO L175 Difference]: Start difference. First operand has 749 places, 1260 transitions, 21672 flow. Second operand 25 states and 156 transitions. [2025-04-13 20:23:50,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 1328 transitions, 26626 flow [2025-04-13 20:23:52,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 1328 transitions, 26262 flow, removed 9 selfloop flow, removed 30 redundant places. [2025-04-13 20:23:52,867 INFO L231 Difference]: Finished difference. Result has 746 places, 1300 transitions, 23712 flow [2025-04-13 20:23:52,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=21308, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=23712, PETRI_PLACES=746, PETRI_TRANSITIONS=1300} [2025-04-13 20:23:52,868 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 724 predicate places. [2025-04-13 20:23:52,868 INFO L485 AbstractCegarLoop]: Abstraction has has 746 places, 1300 transitions, 23712 flow [2025-04-13 20:23:52,868 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:23:52,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:52,868 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:52,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-04-13 20:23:53,069 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2025-04-13 20:23:53,069 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:23:53,069 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash -2062912471, now seen corresponding path program 32 times [2025-04-13 20:23:53,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:53,070 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512390136] [2025-04-13 20:23:53,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:23:53,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:53,075 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:53,081 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:53,081 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:23:53,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:23:53,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:53,271 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512390136] [2025-04-13 20:23:53,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512390136] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:53,271 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377144838] [2025-04-13 20:23:53,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:23:53,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:53,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:53,273 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:53,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-04-13 20:23:53,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:23:53,342 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:23:53,342 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:23:53,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:53,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:23:53,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:53,379 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:23:53,571 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:53,571 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 17 treesize of output 14 [2025-04-13 20:23:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:53,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:23:53,890 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 36 treesize of output 32 [2025-04-13 20:23:53,895 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:23:53,895 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 66 [2025-04-13 20:23:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:53,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377144838] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:23:53,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:23:53,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 37 [2025-04-13 20:23:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780723010] [2025-04-13 20:23:53,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:23:53,966 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:23:53,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:53,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:23:53,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:23:53,967 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:23:53,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 746 places, 1300 transitions, 23712 flow. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:23:53,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:53,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:23:53,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:56,849 INFO L116 PetriNetUnfolderBase]: 3085/5365 cut-off events. [2025-04-13 20:23:56,849 INFO L117 PetriNetUnfolderBase]: For 338764/338764 co-relation queries the response was YES. [2025-04-13 20:23:56,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66008 conditions, 5365 events. 3085/5365 cut-off events. For 338764/338764 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 36020 event pairs, 219 based on Foata normal form. 3/5310 useless extension candidates. Maximal degree in co-relation 65796. Up to 4931 conditions per place. [2025-04-13 20:23:56,916 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1240 selfloop transitions, 199 changer transitions 14/1453 dead transitions. [2025-04-13 20:23:56,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 1453 transitions, 32865 flow [2025-04-13 20:23:56,917 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-04-13 20:23:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-04-13 20:23:56,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 267 transitions. [2025-04-13 20:23:56,917 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26383399209486164 [2025-04-13 20:23:56,917 INFO L175 Difference]: Start difference. First operand has 746 places, 1300 transitions, 23712 flow. Second operand 44 states and 267 transitions. [2025-04-13 20:23:56,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 1453 transitions, 32865 flow [2025-04-13 20:23:59,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 777 places, 1453 transitions, 29783 flow, removed 1442 selfloop flow, removed 12 redundant places. [2025-04-13 20:23:59,957 INFO L231 Difference]: Finished difference. Result has 791 places, 1390 transitions, 26949 flow [2025-04-13 20:23:59,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=21922, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=26949, PETRI_PLACES=791, PETRI_TRANSITIONS=1390} [2025-04-13 20:23:59,958 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 769 predicate places. [2025-04-13 20:23:59,958 INFO L485 AbstractCegarLoop]: Abstraction has has 791 places, 1390 transitions, 26949 flow [2025-04-13 20:23:59,959 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:23:59,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:59,959 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:59,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-04-13 20:24:00,163 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2025-04-13 20:24:00,163 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:00,164 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:00,164 INFO L85 PathProgramCache]: Analyzing trace with hash -142720129, now seen corresponding path program 33 times [2025-04-13 20:24:00,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:00,164 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125287792] [2025-04-13 20:24:00,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:24:00,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:00,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:00,173 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:00,173 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:24:00,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:00,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:00,378 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125287792] [2025-04-13 20:24:00,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125287792] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:00,379 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647639083] [2025-04-13 20:24:00,379 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:24:00,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:00,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:00,380 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:00,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-04-13 20:24:00,429 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:00,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:00,442 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:24:00,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:00,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-04-13 20:24:00,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:00,463 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:24:00,610 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:00,611 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 19 treesize of output 16 [2025-04-13 20:24:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:24:00,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:24:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647639083] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:00,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:00,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2025-04-13 20:24:00,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763302242] [2025-04-13 20:24:00,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:00,825 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-04-13 20:24:00,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:00,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-04-13 20:24:00,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2025-04-13 20:24:00,826 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:24:00,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 1390 transitions, 26949 flow. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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 20:24:00,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:00,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:24:00,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:03,689 INFO L116 PetriNetUnfolderBase]: 3176/5516 cut-off events. [2025-04-13 20:24:03,689 INFO L117 PetriNetUnfolderBase]: For 364706/364706 co-relation queries the response was YES. [2025-04-13 20:24:03,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67124 conditions, 5516 events. 3176/5516 cut-off events. For 364706/364706 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37212 event pairs, 213 based on Foata normal form. 2/5456 useless extension candidates. Maximal degree in co-relation 66899. Up to 5224 conditions per place. [2025-04-13 20:24:03,757 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1357 selfloop transitions, 125 changer transitions 7/1489 dead transitions. [2025-04-13 20:24:03,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 824 places, 1489 transitions, 32680 flow [2025-04-13 20:24:03,758 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:24:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:24:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 212 transitions. [2025-04-13 20:24:03,758 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2560386473429952 [2025-04-13 20:24:03,758 INFO L175 Difference]: Start difference. First operand has 791 places, 1390 transitions, 26949 flow. Second operand 36 states and 212 transitions. [2025-04-13 20:24:03,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 824 places, 1489 transitions, 32680 flow [2025-04-13 20:24:06,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 803 places, 1489 transitions, 29134 flow, removed 1688 selfloop flow, removed 21 redundant places. [2025-04-13 20:24:06,822 INFO L231 Difference]: Finished difference. Result has 813 places, 1444 transitions, 26150 flow [2025-04-13 20:24:06,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=23403, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=26150, PETRI_PLACES=813, PETRI_TRANSITIONS=1444} [2025-04-13 20:24:06,823 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 791 predicate places. [2025-04-13 20:24:06,823 INFO L485 AbstractCegarLoop]: Abstraction has has 813 places, 1444 transitions, 26150 flow [2025-04-13 20:24:06,824 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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 20:24:06,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:06,824 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:06,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-04-13 20:24:07,024 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:07,024 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:07,025 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1887228259, now seen corresponding path program 34 times [2025-04-13 20:24:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:07,025 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688556663] [2025-04-13 20:24:07,025 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:24:07,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:07,029 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:07,033 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 20:24:07,033 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:24:07,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:07,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:07,241 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688556663] [2025-04-13 20:24:07,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688556663] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:07,242 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473782562] [2025-04-13 20:24:07,242 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:24:07,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:07,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:07,243 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:07,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-04-13 20:24:07,291 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:07,303 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 20:24:07,303 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:24:07,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:07,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:24:07,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:07,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:07,485 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:07,485 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 35 treesize of output 43 [2025-04-13 20:24:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:07,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473782562] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:07,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:07,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2025-04-13 20:24:07,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036659929] [2025-04-13 20:24:07,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:07,518 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-13 20:24:07,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:07,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-13 20:24:07,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2025-04-13 20:24:07,519 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:24:07,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 813 places, 1444 transitions, 26150 flow. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 20:24:07,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:07,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:24:07,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:10,094 INFO L116 PetriNetUnfolderBase]: 3207/5584 cut-off events. [2025-04-13 20:24:10,094 INFO L117 PetriNetUnfolderBase]: For 356667/356667 co-relation queries the response was YES. [2025-04-13 20:24:10,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65820 conditions, 5584 events. 3207/5584 cut-off events. For 356667/356667 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 37801 event pairs, 226 based on Foata normal form. 2/5514 useless extension candidates. Maximal degree in co-relation 65588. Up to 5272 conditions per place. [2025-04-13 20:24:10,178 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1363 selfloop transitions, 121 changer transitions 4/1488 dead transitions. [2025-04-13 20:24:10,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 1488 transitions, 30280 flow [2025-04-13 20:24:10,178 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 20:24:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 20:24:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 140 transitions. [2025-04-13 20:24:10,179 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2898550724637681 [2025-04-13 20:24:10,179 INFO L175 Difference]: Start difference. First operand has 813 places, 1444 transitions, 26150 flow. Second operand 21 states and 140 transitions. [2025-04-13 20:24:10,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 1488 transitions, 30280 flow [2025-04-13 20:24:13,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 1488 transitions, 28487 flow, removed 858 selfloop flow, removed 11 redundant places. [2025-04-13 20:24:13,019 INFO L231 Difference]: Finished difference. Result has 826 places, 1460 transitions, 25526 flow [2025-04-13 20:24:13,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=24495, PETRI_DIFFERENCE_MINUEND_PLACES=801, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=25526, PETRI_PLACES=826, PETRI_TRANSITIONS=1460} [2025-04-13 20:24:13,021 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 804 predicate places. [2025-04-13 20:24:13,021 INFO L485 AbstractCegarLoop]: Abstraction has has 826 places, 1460 transitions, 25526 flow [2025-04-13 20:24:13,021 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 20:24:13,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:13,021 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:13,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-04-13 20:24:13,221 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:13,221 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:13,222 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1582440667, now seen corresponding path program 35 times [2025-04-13 20:24:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:13,222 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664460116] [2025-04-13 20:24:13,222 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:24:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:13,226 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:13,229 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:13,229 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:24:13,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:13,556 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 20:24:13,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:13,557 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664460116] [2025-04-13 20:24:13,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664460116] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:13,557 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580184761] [2025-04-13 20:24:13,557 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:24:13,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:13,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:13,559 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:13,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-04-13 20:24:13,615 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:13,630 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:13,630 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:24:13,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:13,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:24:13,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:13,752 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:13,753 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 35 treesize of output 41 [2025-04-13 20:24:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:13,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:13,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580184761] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:13,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:13,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 21 [2025-04-13 20:24:13,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594589056] [2025-04-13 20:24:13,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:13,856 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-13 20:24:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:13,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-13 20:24:13,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-04-13 20:24:13,857 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:24:13,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 1460 transitions, 25526 flow. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 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 20:24:13,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:13,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:24:13,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:16,636 INFO L116 PetriNetUnfolderBase]: 3292/5735 cut-off events. [2025-04-13 20:24:16,637 INFO L117 PetriNetUnfolderBase]: For 373300/373300 co-relation queries the response was YES. [2025-04-13 20:24:16,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68087 conditions, 5735 events. 3292/5735 cut-off events. For 373300/373300 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 39091 event pairs, 221 based on Foata normal form. 1/5664 useless extension candidates. Maximal degree in co-relation 67850. Up to 5380 conditions per place. [2025-04-13 20:24:16,724 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1358 selfloop transitions, 170 changer transitions 4/1532 dead transitions. [2025-04-13 20:24:16,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 1532 transitions, 30994 flow [2025-04-13 20:24:16,724 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-13 20:24:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-13 20:24:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 174 transitions. [2025-04-13 20:24:16,724 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2608695652173913 [2025-04-13 20:24:16,725 INFO L175 Difference]: Start difference. First operand has 826 places, 1460 transitions, 25526 flow. Second operand 29 states and 174 transitions. [2025-04-13 20:24:16,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 1532 transitions, 30994 flow [2025-04-13 20:24:19,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 842 places, 1532 transitions, 30415 flow, removed 244 selfloop flow, removed 12 redundant places. [2025-04-13 20:24:19,608 INFO L231 Difference]: Finished difference. Result has 852 places, 1496 transitions, 27421 flow [2025-04-13 20:24:19,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=24947, PETRI_DIFFERENCE_MINUEND_PLACES=814, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=27421, PETRI_PLACES=852, PETRI_TRANSITIONS=1496} [2025-04-13 20:24:19,610 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 830 predicate places. [2025-04-13 20:24:19,610 INFO L485 AbstractCegarLoop]: Abstraction has has 852 places, 1496 transitions, 27421 flow [2025-04-13 20:24:19,610 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 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 20:24:19,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:19,610 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:19,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2025-04-13 20:24:19,810 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2025-04-13 20:24:19,811 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:19,811 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2126871223, now seen corresponding path program 36 times [2025-04-13 20:24:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:19,811 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477155611] [2025-04-13 20:24:19,811 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:24:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:19,816 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:19,821 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:19,821 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:24:19,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:20,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:20,032 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477155611] [2025-04-13 20:24:20,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477155611] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:20,032 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760087829] [2025-04-13 20:24:20,032 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:24:20,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:20,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:20,034 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:20,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-04-13 20:24:20,083 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:20,095 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:20,095 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:24:20,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:20,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:24:20,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:20,118 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:24:20,216 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:20,216 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 15 treesize of output 14 [2025-04-13 20:24:20,318 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 20:24:20,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:20,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760087829] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:20,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 9] total 29 [2025-04-13 20:24:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946783242] [2025-04-13 20:24:20,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:20,429 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-13 20:24:20,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:20,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-13 20:24:20,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2025-04-13 20:24:20,430 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:24:20,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 852 places, 1496 transitions, 27421 flow. Second operand has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 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 20:24:20,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:20,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:24:20,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:23,464 INFO L116 PetriNetUnfolderBase]: 3324/5791 cut-off events. [2025-04-13 20:24:23,465 INFO L117 PetriNetUnfolderBase]: For 412114/412114 co-relation queries the response was YES. [2025-04-13 20:24:23,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69776 conditions, 5791 events. 3324/5791 cut-off events. For 412114/412114 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 39568 event pairs, 210 based on Foata normal form. 1/5724 useless extension candidates. Maximal degree in co-relation 69528. Up to 5396 conditions per place. [2025-04-13 20:24:23,540 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1337 selfloop transitions, 224 changer transitions 5/1566 dead transitions. [2025-04-13 20:24:23,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 1566 transitions, 32042 flow [2025-04-13 20:24:23,541 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:24:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:24:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 195 transitions. [2025-04-13 20:24:23,541 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.23550724637681159 [2025-04-13 20:24:23,541 INFO L175 Difference]: Start difference. First operand has 852 places, 1496 transitions, 27421 flow. Second operand 36 states and 195 transitions. [2025-04-13 20:24:23,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 1566 transitions, 32042 flow [2025-04-13 20:24:26,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 871 places, 1566 transitions, 30424 flow, removed 747 selfloop flow, removed 16 redundant places. [2025-04-13 20:24:26,830 INFO L231 Difference]: Finished difference. Result has 880 places, 1526 transitions, 27653 flow [2025-04-13 20:24:26,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=25805, PETRI_DIFFERENCE_MINUEND_PLACES=836, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=27653, PETRI_PLACES=880, PETRI_TRANSITIONS=1526} [2025-04-13 20:24:26,831 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 858 predicate places. [2025-04-13 20:24:26,831 INFO L485 AbstractCegarLoop]: Abstraction has has 880 places, 1526 transitions, 27653 flow [2025-04-13 20:24:26,832 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5806451612903225) internal successors, (111), 31 states have internal predecessors, (111), 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 20:24:26,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:26,832 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:26,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-04-13 20:24:27,032 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:27,032 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:27,033 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash -278913077, now seen corresponding path program 37 times [2025-04-13 20:24:27,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:27,033 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009198930] [2025-04-13 20:24:27,033 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:24:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:27,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:24:27,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:27,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:24:27,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:24:27,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:27,336 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009198930] [2025-04-13 20:24:27,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009198930] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:27,337 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642217140] [2025-04-13 20:24:27,337 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:24:27,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:27,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:27,339 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:27,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-04-13 20:24:27,395 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:24:27,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:27,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:24:27,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:27,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:24:27,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:27,507 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:27,615 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:27,615 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 35 treesize of output 43 [2025-04-13 20:24:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:27,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642217140] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:27,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:27,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:24:27,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339720329] [2025-04-13 20:24:27,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:27,645 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:24:27,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:27,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:24:27,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:24:27,645 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:24:27,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 1526 transitions, 27653 flow. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:24:27,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:27,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:24:27,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:30,651 INFO L116 PetriNetUnfolderBase]: 3363/5860 cut-off events. [2025-04-13 20:24:30,652 INFO L117 PetriNetUnfolderBase]: For 422941/422941 co-relation queries the response was YES. [2025-04-13 20:24:30,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70735 conditions, 5860 events. 3363/5860 cut-off events. For 422941/422941 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 40165 event pairs, 226 based on Foata normal form. 2/5796 useless extension candidates. Maximal degree in co-relation 70479. Up to 5612 conditions per place. [2025-04-13 20:24:30,727 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1474 selfloop transitions, 86 changer transitions 4/1564 dead transitions. [2025-04-13 20:24:30,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 1564 transitions, 31840 flow [2025-04-13 20:24:30,727 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-13 20:24:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-13 20:24:30,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 127 transitions. [2025-04-13 20:24:30,728 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2906178489702517 [2025-04-13 20:24:30,728 INFO L175 Difference]: Start difference. First operand has 880 places, 1526 transitions, 27653 flow. Second operand 19 states and 127 transitions. [2025-04-13 20:24:30,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 1564 transitions, 31840 flow [2025-04-13 20:24:34,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 1564 transitions, 30477 flow, removed 594 selfloop flow, removed 21 redundant places. [2025-04-13 20:24:34,265 INFO L231 Difference]: Finished difference. Result has 880 places, 1536 transitions, 27068 flow [2025-04-13 20:24:34,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26290, PETRI_DIFFERENCE_MINUEND_PLACES=858, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=27068, PETRI_PLACES=880, PETRI_TRANSITIONS=1536} [2025-04-13 20:24:34,266 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 858 predicate places. [2025-04-13 20:24:34,266 INFO L485 AbstractCegarLoop]: Abstraction has has 880 places, 1536 transitions, 27068 flow [2025-04-13 20:24:34,266 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:24:34,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:34,266 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:34,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2025-04-13 20:24:34,467 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2025-04-13 20:24:34,467 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:34,468 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1838785949, now seen corresponding path program 38 times [2025-04-13 20:24:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:34,468 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833124249] [2025-04-13 20:24:34,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:24:34,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:34,472 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:34,477 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:34,477 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:24:34,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:34,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:34,697 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833124249] [2025-04-13 20:24:34,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833124249] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:34,697 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93205046] [2025-04-13 20:24:34,698 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:24:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:34,699 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:34,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-04-13 20:24:34,756 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:34,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:34,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:24:34,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:34,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:24:34,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:34,803 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-04-13 20:24:34,958 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:34,958 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 17 treesize of output 14 [2025-04-13 20:24:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:35,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:35,285 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 36 treesize of output 32 [2025-04-13 20:24:35,291 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:35,291 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 66 [2025-04-13 20:24:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:35,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93205046] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:35,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:35,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 37 [2025-04-13 20:24:35,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778861190] [2025-04-13 20:24:35,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:35,379 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:24:35,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:35,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:24:35,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:24:35,380 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:24:35,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 1536 transitions, 27068 flow. Second operand has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:24:35,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:35,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:24:35,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:38,662 INFO L116 PetriNetUnfolderBase]: 3410/5962 cut-off events. [2025-04-13 20:24:38,662 INFO L117 PetriNetUnfolderBase]: For 440605/440605 co-relation queries the response was YES. [2025-04-13 20:24:38,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72232 conditions, 5962 events. 3410/5962 cut-off events. For 440605/440605 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 41152 event pairs, 219 based on Foata normal form. 1/5897 useless extension candidates. Maximal degree in co-relation 71974. Up to 5377 conditions per place. [2025-04-13 20:24:38,743 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1308 selfloop transitions, 293 changer transitions 4/1605 dead transitions. [2025-04-13 20:24:38,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 1605 transitions, 32280 flow [2025-04-13 20:24:38,743 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 20:24:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 20:24:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 207 transitions. [2025-04-13 20:24:38,744 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2647058823529412 [2025-04-13 20:24:38,744 INFO L175 Difference]: Start difference. First operand has 880 places, 1536 transitions, 27068 flow. Second operand 34 states and 207 transitions. [2025-04-13 20:24:38,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 913 places, 1605 transitions, 32280 flow [2025-04-13 20:24:42,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 905 places, 1605 transitions, 31819 flow, removed 198 selfloop flow, removed 8 redundant places. [2025-04-13 20:24:42,784 INFO L231 Difference]: Finished difference. Result has 911 places, 1565 transitions, 29192 flow [2025-04-13 20:24:42,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26607, PETRI_DIFFERENCE_MINUEND_PLACES=872, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=29192, PETRI_PLACES=911, PETRI_TRANSITIONS=1565} [2025-04-13 20:24:42,785 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 889 predicate places. [2025-04-13 20:24:42,785 INFO L485 AbstractCegarLoop]: Abstraction has has 911 places, 1565 transitions, 29192 flow [2025-04-13 20:24:42,785 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 39 states have internal predecessors, (134), 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 20:24:42,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:42,785 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:42,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2025-04-13 20:24:42,986 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:42,986 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:42,986 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:42,986 INFO L85 PathProgramCache]: Analyzing trace with hash 616395803, now seen corresponding path program 39 times [2025-04-13 20:24:42,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:42,987 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191687041] [2025-04-13 20:24:42,987 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:24:42,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:42,992 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:42,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:42,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:24:42,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:43,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:43,171 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191687041] [2025-04-13 20:24:43,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191687041] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:43,171 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866095818] [2025-04-13 20:24:43,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:24:43,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:43,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:43,173 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:43,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-04-13 20:24:43,224 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:43,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:43,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:24:43,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:43,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-04-13 20:24:43,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:43,318 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:43,318 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 17 treesize of output 14 [2025-04-13 20:24:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:24:43,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:43,410 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:43,410 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 21 treesize of output 14 [2025-04-13 20:24:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866095818] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:43,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:43,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 22 [2025-04-13 20:24:43,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939969629] [2025-04-13 20:24:43,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:43,438 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-13 20:24:43,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:43,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-13 20:24:43,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2025-04-13 20:24:43,439 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:24:43,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 911 places, 1565 transitions, 29192 flow. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 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 20:24:43,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:43,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:24:43,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:46,303 INFO L116 PetriNetUnfolderBase]: 3441/6019 cut-off events. [2025-04-13 20:24:46,303 INFO L117 PetriNetUnfolderBase]: For 461968/461968 co-relation queries the response was YES. [2025-04-13 20:24:46,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74082 conditions, 6019 events. 3441/6019 cut-off events. For 461968/461968 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 41627 event pairs, 233 based on Foata normal form. 1/5956 useless extension candidates. Maximal degree in co-relation 73817. Up to 5850 conditions per place. [2025-04-13 20:24:46,393 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1528 selfloop transitions, 83 changer transitions 4/1615 dead transitions. [2025-04-13 20:24:46,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 936 places, 1615 transitions, 33358 flow [2025-04-13 20:24:46,394 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-13 20:24:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-13 20:24:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 157 transitions. [2025-04-13 20:24:46,394 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2625418060200669 [2025-04-13 20:24:46,394 INFO L175 Difference]: Start difference. First operand has 911 places, 1565 transitions, 29192 flow. Second operand 26 states and 157 transitions. [2025-04-13 20:24:46,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 936 places, 1615 transitions, 33358 flow [2025-04-13 20:24:50,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 917 places, 1615 transitions, 31561 flow, removed 811 selfloop flow, removed 19 redundant places. [2025-04-13 20:24:50,594 INFO L231 Difference]: Finished difference. Result has 921 places, 1579 transitions, 28277 flow [2025-04-13 20:24:50,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=27399, PETRI_DIFFERENCE_MINUEND_PLACES=892, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=28277, PETRI_PLACES=921, PETRI_TRANSITIONS=1579} [2025-04-13 20:24:50,595 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 899 predicate places. [2025-04-13 20:24:50,595 INFO L485 AbstractCegarLoop]: Abstraction has has 921 places, 1579 transitions, 28277 flow [2025-04-13 20:24:50,595 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 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 20:24:50,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:50,595 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:50,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-04-13 20:24:50,796 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:50,796 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:50,797 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1577521521, now seen corresponding path program 40 times [2025-04-13 20:24:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:50,797 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175726509] [2025-04-13 20:24:50,797 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:24:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:50,801 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:50,805 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 20:24:50,805 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:24:50,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:51,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:51,140 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175726509] [2025-04-13 20:24:51,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175726509] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:51,140 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696409104] [2025-04-13 20:24:51,140 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:24:51,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:51,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:51,142 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:51,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-04-13 20:24:51,194 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:51,206 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 20:24:51,206 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:24:51,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:51,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:24:51,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:51,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:51,420 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:24:51,420 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 35 treesize of output 43 [2025-04-13 20:24:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:24:51,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696409104] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:51,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:51,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2025-04-13 20:24:51,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591350939] [2025-04-13 20:24:51,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:51,451 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-13 20:24:51,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:51,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-13 20:24:51,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2025-04-13 20:24:51,451 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:24:51,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 921 places, 1579 transitions, 28277 flow. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 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 20:24:51,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:51,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:24:51,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:55,034 INFO L116 PetriNetUnfolderBase]: 3705/6460 cut-off events. [2025-04-13 20:24:55,035 INFO L117 PetriNetUnfolderBase]: For 462045/462045 co-relation queries the response was YES. [2025-04-13 20:24:55,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77490 conditions, 6460 events. 3705/6460 cut-off events. For 462045/462045 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 44960 event pairs, 233 based on Foata normal form. 1/6397 useless extension candidates. Maximal degree in co-relation 77224. Up to 6017 conditions per place. [2025-04-13 20:24:55,127 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1577 selfloop transitions, 198 changer transitions 1/1776 dead transitions. [2025-04-13 20:24:55,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 952 places, 1776 transitions, 35478 flow [2025-04-13 20:24:55,127 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-13 20:24:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-04-13 20:24:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 209 transitions. [2025-04-13 20:24:55,128 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2753623188405797 [2025-04-13 20:24:55,128 INFO L175 Difference]: Start difference. First operand has 921 places, 1579 transitions, 28277 flow. Second operand 33 states and 209 transitions. [2025-04-13 20:24:55,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 952 places, 1776 transitions, 35478 flow [2025-04-13 20:24:59,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 932 places, 1776 transitions, 34697 flow, removed 274 selfloop flow, removed 20 redundant places. [2025-04-13 20:24:59,659 INFO L231 Difference]: Finished difference. Result has 946 places, 1713 transitions, 31278 flow [2025-04-13 20:24:59,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=27566, PETRI_DIFFERENCE_MINUEND_PLACES=900, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=31278, PETRI_PLACES=946, PETRI_TRANSITIONS=1713} [2025-04-13 20:24:59,660 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 924 predicate places. [2025-04-13 20:24:59,661 INFO L485 AbstractCegarLoop]: Abstraction has has 946 places, 1713 transitions, 31278 flow [2025-04-13 20:24:59,661 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 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 20:24:59,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:59,661 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:59,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-04-13 20:24:59,861 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2025-04-13 20:24:59,861 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:24:59,862 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:59,862 INFO L85 PathProgramCache]: Analyzing trace with hash 941789243, now seen corresponding path program 41 times [2025-04-13 20:24:59,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:59,862 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672321694] [2025-04-13 20:24:59,862 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:24:59,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:59,868 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:24:59,873 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:24:59,873 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:24:59,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:25:00,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:25:00,183 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672321694] [2025-04-13 20:25:00,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672321694] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:25:00,183 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611276855] [2025-04-13 20:25:00,183 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:25:00,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:00,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:25:00,186 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:25:00,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-04-13 20:25:00,240 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:00,257 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:00,257 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:25:00,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:00,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:25:00,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:25:00,375 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:25:00,375 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 35 treesize of output 41 [2025-04-13 20:25:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:00,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:25:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611276855] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:25:00,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:25:00,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2025-04-13 20:25:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134252029] [2025-04-13 20:25:00,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:25:00,499 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-13 20:25:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:25:00,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-13 20:25:00,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2025-04-13 20:25:00,500 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:25:00,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 946 places, 1713 transitions, 31278 flow. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 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 20:25:00,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:25:00,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:25:00,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:25:04,046 INFO L116 PetriNetUnfolderBase]: 3788/6621 cut-off events. [2025-04-13 20:25:04,046 INFO L117 PetriNetUnfolderBase]: For 492820/492820 co-relation queries the response was YES. [2025-04-13 20:25:04,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81160 conditions, 6621 events. 3788/6621 cut-off events. For 492820/492820 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 46473 event pairs, 238 based on Foata normal form. 2/6557 useless extension candidates. Maximal degree in co-relation 80880. Up to 6295 conditions per place. [2025-04-13 20:25:04,145 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1638 selfloop transitions, 142 changer transitions 6/1786 dead transitions. [2025-04-13 20:25:04,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 967 places, 1786 transitions, 37481 flow [2025-04-13 20:25:04,145 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:25:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:25:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 138 transitions. [2025-04-13 20:25:04,146 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2025-04-13 20:25:04,146 INFO L175 Difference]: Start difference. First operand has 946 places, 1713 transitions, 31278 flow. Second operand 22 states and 138 transitions. [2025-04-13 20:25:04,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 967 places, 1786 transitions, 37481 flow [2025-04-13 20:25:08,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 964 places, 1786 transitions, 37096 flow, removed 189 selfloop flow, removed 3 redundant places. [2025-04-13 20:25:08,611 INFO L231 Difference]: Finished difference. Result has 973 places, 1752 transitions, 33417 flow [2025-04-13 20:25:08,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=30893, PETRI_DIFFERENCE_MINUEND_PLACES=943, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=33417, PETRI_PLACES=973, PETRI_TRANSITIONS=1752} [2025-04-13 20:25:08,612 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 951 predicate places. [2025-04-13 20:25:08,612 INFO L485 AbstractCegarLoop]: Abstraction has has 973 places, 1752 transitions, 33417 flow [2025-04-13 20:25:08,613 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 23 states have internal predecessors, (84), 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 20:25:08,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:25:08,613 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:25:08,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-04-13 20:25:08,813 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-04-13 20:25:08,813 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:25:08,814 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:25:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1213732461, now seen corresponding path program 42 times [2025-04-13 20:25:08,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:25:08,814 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288453146] [2025-04-13 20:25:08,814 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:25:08,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:25:08,817 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:08,822 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:08,822 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:25:08,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:09,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:25:09,002 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288453146] [2025-04-13 20:25:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288453146] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:25:09,002 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292220766] [2025-04-13 20:25:09,002 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:25:09,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:09,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:25:09,004 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:25:09,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-04-13 20:25:09,055 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:09,067 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:09,067 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:25:09,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:09,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-04-13 20:25:09,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:25:09,148 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:25:09,148 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 17 treesize of output 14 [2025-04-13 20:25:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:25:09,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:25:09,389 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:25:09,389 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 17 treesize of output 14 [2025-04-13 20:25:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:09,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292220766] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:25:09,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:25:09,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 23 [2025-04-13 20:25:09,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531602280] [2025-04-13 20:25:09,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:25:09,407 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 20:25:09,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:25:09,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 20:25:09,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2025-04-13 20:25:09,407 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:25:09,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 973 places, 1752 transitions, 33417 flow. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 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 20:25:09,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:25:09,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:25:09,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:25:12,931 INFO L116 PetriNetUnfolderBase]: 3797/6634 cut-off events. [2025-04-13 20:25:12,931 INFO L117 PetriNetUnfolderBase]: For 541946/541946 co-relation queries the response was YES. [2025-04-13 20:25:13,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83290 conditions, 6634 events. 3797/6634 cut-off events. For 541946/541946 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46462 event pairs, 224 based on Foata normal form. 1/6569 useless extension candidates. Maximal degree in co-relation 83000. Up to 6222 conditions per place. [2025-04-13 20:25:13,032 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1581 selfloop transitions, 213 changer transitions 3/1797 dead transitions. [2025-04-13 20:25:13,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1001 places, 1797 transitions, 37936 flow [2025-04-13 20:25:13,033 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-13 20:25:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-13 20:25:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 176 transitions. [2025-04-13 20:25:13,034 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2638680659670165 [2025-04-13 20:25:13,034 INFO L175 Difference]: Start difference. First operand has 973 places, 1752 transitions, 33417 flow. Second operand 29 states and 176 transitions. [2025-04-13 20:25:13,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1001 places, 1797 transitions, 37936 flow [2025-04-13 20:25:18,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 992 places, 1797 transitions, 36254 flow, removed 793 selfloop flow, removed 9 redundant places. [2025-04-13 20:25:18,446 INFO L231 Difference]: Finished difference. Result has 995 places, 1760 transitions, 32841 flow [2025-04-13 20:25:18,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=31735, PETRI_DIFFERENCE_MINUEND_PLACES=964, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=32841, PETRI_PLACES=995, PETRI_TRANSITIONS=1760} [2025-04-13 20:25:18,447 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 973 predicate places. [2025-04-13 20:25:18,448 INFO L485 AbstractCegarLoop]: Abstraction has has 995 places, 1760 transitions, 32841 flow [2025-04-13 20:25:18,448 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 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 20:25:18,448 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:25:18,448 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:25:18,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-04-13 20:25:18,648 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2025-04-13 20:25:18,649 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:25:18,649 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:25:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1645139223, now seen corresponding path program 43 times [2025-04-13 20:25:18,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:25:18,649 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232023678] [2025-04-13 20:25:18,650 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:25:18,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:25:18,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:25:18,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:18,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:25:18,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:25:18,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:25:18,909 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232023678] [2025-04-13 20:25:18,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232023678] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:25:18,909 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621751269] [2025-04-13 20:25:18,909 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:25:18,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:18,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:25:18,911 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:25:18,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-04-13 20:25:18,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:25:18,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:18,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:25:18,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:18,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:25:18,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:25:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:19,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:25:19,161 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:25:19,161 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 42 treesize of output 45 [2025-04-13 20:25:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:19,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621751269] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:25:19,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:25:19,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:25:19,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108747832] [2025-04-13 20:25:19,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:25:19,208 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:25:19,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:25:19,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:25:19,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:25:19,208 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:25:19,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 1760 transitions, 32841 flow. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:25:19,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:25:19,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:25:19,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:25:22,606 INFO L116 PetriNetUnfolderBase]: 3847/6717 cut-off events. [2025-04-13 20:25:22,607 INFO L117 PetriNetUnfolderBase]: For 573473/573473 co-relation queries the response was YES. [2025-04-13 20:25:22,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85073 conditions, 6717 events. 3847/6717 cut-off events. For 573473/573473 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 47146 event pairs, 256 based on Foata normal form. 1/6652 useless extension candidates. Maximal degree in co-relation 84780. Up to 6489 conditions per place. [2025-04-13 20:25:22,721 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1702 selfloop transitions, 92 changer transitions 1/1795 dead transitions. [2025-04-13 20:25:22,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1011 places, 1795 transitions, 37875 flow [2025-04-13 20:25:22,721 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-13 20:25:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-13 20:25:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 115 transitions. [2025-04-13 20:25:22,721 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2025-04-13 20:25:22,722 INFO L175 Difference]: Start difference. First operand has 995 places, 1760 transitions, 32841 flow. Second operand 17 states and 115 transitions. [2025-04-13 20:25:22,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1011 places, 1795 transitions, 37875 flow [2025-04-13 20:25:28,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 986 places, 1795 transitions, 37070 flow, removed 249 selfloop flow, removed 25 redundant places. [2025-04-13 20:25:28,187 INFO L231 Difference]: Finished difference. Result has 987 places, 1768 transitions, 32959 flow [2025-04-13 20:25:28,188 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=32040, PETRI_DIFFERENCE_MINUEND_PLACES=970, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=32959, PETRI_PLACES=987, PETRI_TRANSITIONS=1768} [2025-04-13 20:25:28,188 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 965 predicate places. [2025-04-13 20:25:28,188 INFO L485 AbstractCegarLoop]: Abstraction has has 987 places, 1768 transitions, 32959 flow [2025-04-13 20:25:28,188 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:25:28,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:25:28,188 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:25:28,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-04-13 20:25:28,389 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:28,389 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:25:28,389 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:25:28,389 INFO L85 PathProgramCache]: Analyzing trace with hash 693256583, now seen corresponding path program 44 times [2025-04-13 20:25:28,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:25:28,389 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81047215] [2025-04-13 20:25:28,389 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:25:28,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:25:28,393 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:28,397 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:28,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:25:28,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:28,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:25:28,582 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81047215] [2025-04-13 20:25:28,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81047215] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:25:28,582 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599395718] [2025-04-13 20:25:28,582 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:25:28,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:25:28,583 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:25:28,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-04-13 20:25:28,636 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:28,650 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:28,650 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:25:28,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:28,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:25:28,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:25:28,672 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:25:28,770 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:25:28,770 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 15 treesize of output 14 [2025-04-13 20:25:28,804 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 20:25:28,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:25:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:28,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599395718] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:25:28,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:25:28,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 9] total 28 [2025-04-13 20:25:28,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510783725] [2025-04-13 20:25:28,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:25:28,912 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-13 20:25:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:25:28,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-13 20:25:28,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2025-04-13 20:25:28,913 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:25:28,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 1768 transitions, 32959 flow. Second operand has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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 20:25:28,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:25:28,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:25:28,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:25:32,624 INFO L116 PetriNetUnfolderBase]: 3864/6758 cut-off events. [2025-04-13 20:25:32,625 INFO L117 PetriNetUnfolderBase]: For 574615/574615 co-relation queries the response was YES. [2025-04-13 20:25:32,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85593 conditions, 6758 events. 3864/6758 cut-off events. For 574615/574615 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 47589 event pairs, 228 based on Foata normal form. 1/6693 useless extension candidates. Maximal degree in co-relation 85300. Up to 6347 conditions per place. [2025-04-13 20:25:32,731 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1610 selfloop transitions, 207 changer transitions 4/1821 dead transitions. [2025-04-13 20:25:32,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1017 places, 1821 transitions, 37875 flow [2025-04-13 20:25:32,732 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-13 20:25:32,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-13 20:25:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 172 transitions. [2025-04-13 20:25:32,732 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24123422159887797 [2025-04-13 20:25:32,732 INFO L175 Difference]: Start difference. First operand has 987 places, 1768 transitions, 32959 flow. Second operand 31 states and 172 transitions. [2025-04-13 20:25:32,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1017 places, 1821 transitions, 37875 flow [2025-04-13 20:25:38,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1011 places, 1821 transitions, 37400 flow, removed 208 selfloop flow, removed 6 redundant places. [2025-04-13 20:25:38,441 INFO L231 Difference]: Finished difference. Result has 1014 places, 1782 transitions, 33930 flow [2025-04-13 20:25:38,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=32484, PETRI_DIFFERENCE_MINUEND_PLACES=981, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33930, PETRI_PLACES=1014, PETRI_TRANSITIONS=1782} [2025-04-13 20:25:38,442 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 992 predicate places. [2025-04-13 20:25:38,443 INFO L485 AbstractCegarLoop]: Abstraction has has 1014 places, 1782 transitions, 33930 flow [2025-04-13 20:25:38,443 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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 20:25:38,443 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:25:38,443 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:25:38,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2025-04-13 20:25:38,643 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2025-04-13 20:25:38,643 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:25:38,644 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:25:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -503406243, now seen corresponding path program 45 times [2025-04-13 20:25:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:25:38,644 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520213297] [2025-04-13 20:25:38,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:25:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:25:38,648 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:38,652 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:38,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:25:38,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:39,025 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 20:25:39,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:25:39,026 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520213297] [2025-04-13 20:25:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520213297] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:25:39,026 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109795458] [2025-04-13 20:25:39,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:25:39,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:39,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:25:39,028 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:25:39,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-04-13 20:25:39,093 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:39,125 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:25:39,125 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:25:39,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:39,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:25:39,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:25:39,139 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:25:39,264 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:25:39,264 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 15 treesize of output 14 [2025-04-13 20:25:39,322 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 20:25:39,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:25:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:39,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109795458] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:25:39,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:25:39,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 9] total 27 [2025-04-13 20:25:39,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762133531] [2025-04-13 20:25:39,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:25:39,472 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-13 20:25:39,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:25:39,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-13 20:25:39,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2025-04-13 20:25:39,473 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:25:39,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1014 places, 1782 transitions, 33930 flow. Second operand has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 states have internal predecessors, (105), 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 20:25:39,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:25:39,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:25:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:25:43,360 INFO L116 PetriNetUnfolderBase]: 3982/6963 cut-off events. [2025-04-13 20:25:43,360 INFO L117 PetriNetUnfolderBase]: For 669874/669874 co-relation queries the response was YES. [2025-04-13 20:25:43,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92728 conditions, 6963 events. 3982/6963 cut-off events. For 669874/669874 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 49246 event pairs, 254 based on Foata normal form. 1/6898 useless extension candidates. Maximal degree in co-relation 92431. Up to 6630 conditions per place. [2025-04-13 20:25:43,468 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1737 selfloop transitions, 135 changer transitions 4/1876 dead transitions. [2025-04-13 20:25:43,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1044 places, 1876 transitions, 41906 flow [2025-04-13 20:25:43,468 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-13 20:25:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-13 20:25:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 198 transitions. [2025-04-13 20:25:43,469 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26902173913043476 [2025-04-13 20:25:43,469 INFO L175 Difference]: Start difference. First operand has 1014 places, 1782 transitions, 33930 flow. Second operand 32 states and 198 transitions. [2025-04-13 20:25:43,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1044 places, 1876 transitions, 41906 flow [2025-04-13 20:25:50,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1030 places, 1876 transitions, 40842 flow, removed 456 selfloop flow, removed 14 redundant places. [2025-04-13 20:25:50,185 INFO L231 Difference]: Finished difference. Result has 1040 places, 1823 transitions, 36093 flow [2025-04-13 20:25:50,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=32866, PETRI_DIFFERENCE_MINUEND_PLACES=999, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=36093, PETRI_PLACES=1040, PETRI_TRANSITIONS=1823} [2025-04-13 20:25:50,189 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1018 predicate places. [2025-04-13 20:25:50,189 INFO L485 AbstractCegarLoop]: Abstraction has has 1040 places, 1823 transitions, 36093 flow [2025-04-13 20:25:50,191 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 states have internal predecessors, (105), 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 20:25:50,191 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:25:50,191 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:25:50,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-04-13 20:25:50,394 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:50,395 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:25:50,395 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:25:50,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1290593241, now seen corresponding path program 46 times [2025-04-13 20:25:50,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:25:50,396 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112974772] [2025-04-13 20:25:50,396 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:25:50,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:25:50,400 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:50,404 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 20:25:50,404 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:25:50,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:50,679 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 20:25:50,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:25:50,679 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112974772] [2025-04-13 20:25:50,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112974772] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:25:50,679 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723719009] [2025-04-13 20:25:50,679 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:25:50,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:50,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:25:50,681 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:25:50,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2025-04-13 20:25:50,733 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:25:50,745 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 20:25:50,745 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:25:50,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:50,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:25:50,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:25:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:50,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:25:50,946 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:25:50,946 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 35 treesize of output 43 [2025-04-13 20:25:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:25:50,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723719009] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:25:50,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:25:50,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:25:50,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391036848] [2025-04-13 20:25:50,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:25:50,972 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:25:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:25:50,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:25:50,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:25:50,973 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:25:50,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1040 places, 1823 transitions, 36093 flow. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:25:50,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:25:50,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:25:50,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:25:55,829 INFO L116 PetriNetUnfolderBase]: 4215/7386 cut-off events. [2025-04-13 20:25:55,830 INFO L117 PetriNetUnfolderBase]: For 854870/854870 co-relation queries the response was YES. [2025-04-13 20:25:55,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104823 conditions, 7386 events. 4215/7386 cut-off events. For 854870/854870 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 53081 event pairs, 283 based on Foata normal form. 25/7343 useless extension candidates. Maximal degree in co-relation 104515. Up to 6719 conditions per place. [2025-04-13 20:25:55,961 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1790 selfloop transitions, 177 changer transitions 23/1990 dead transitions. [2025-04-13 20:25:55,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1076 places, 1990 transitions, 46312 flow [2025-04-13 20:25:55,961 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-04-13 20:25:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-04-13 20:25:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 262 transitions. [2025-04-13 20:25:55,962 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3078730904817861 [2025-04-13 20:25:55,962 INFO L175 Difference]: Start difference. First operand has 1040 places, 1823 transitions, 36093 flow. Second operand 37 states and 262 transitions. [2025-04-13 20:25:55,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1076 places, 1990 transitions, 46312 flow [2025-04-13 20:26:03,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1059 places, 1990 transitions, 44424 flow, removed 853 selfloop flow, removed 17 redundant places. [2025-04-13 20:26:03,234 INFO L231 Difference]: Finished difference. Result has 1071 places, 1898 transitions, 39270 flow [2025-04-13 20:26:03,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=34205, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=39270, PETRI_PLACES=1071, PETRI_TRANSITIONS=1898} [2025-04-13 20:26:03,236 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1049 predicate places. [2025-04-13 20:26:03,236 INFO L485 AbstractCegarLoop]: Abstraction has has 1071 places, 1898 transitions, 39270 flow [2025-04-13 20:26:03,236 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 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 20:26:03,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:26:03,236 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:26:03,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2025-04-13 20:26:03,436 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:26:03,437 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:26:03,437 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:26:03,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1533859065, now seen corresponding path program 47 times [2025-04-13 20:26:03,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:26:03,438 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799999928] [2025-04-13 20:26:03,438 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:26:03,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:26:03,442 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:26:03,446 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:26:03,447 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:26:03,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:26:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:26:03,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:26:03,653 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799999928] [2025-04-13 20:26:03,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799999928] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:26:03,653 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684350403] [2025-04-13 20:26:03,653 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:26:03,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:26:03,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:26:03,655 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:26:03,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2025-04-13 20:26:03,711 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:26:03,723 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:26:03,723 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:26:03,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:26:03,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-13 20:26:03,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:26:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:26:03,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:26:03,863 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:26:03,863 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 42 treesize of output 45 [2025-04-13 20:26:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:26:03,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684350403] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:26:03,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:26:03,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 21 [2025-04-13 20:26:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396663335] [2025-04-13 20:26:03,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:26:03,903 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-13 20:26:03,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:26:03,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-13 20:26:03,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-04-13 20:26:03,903 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:26:03,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1071 places, 1898 transitions, 39270 flow. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 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 20:26:03,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:26:03,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:26:03,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:26:08,245 INFO L116 PetriNetUnfolderBase]: 4280/7489 cut-off events. [2025-04-13 20:26:08,245 INFO L117 PetriNetUnfolderBase]: For 928191/928191 co-relation queries the response was YES. [2025-04-13 20:26:08,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108977 conditions, 7489 events. 4280/7489 cut-off events. For 928191/928191 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 53733 event pairs, 284 based on Foata normal form. 2/7423 useless extension candidates. Maximal degree in co-relation 108658. Up to 7214 conditions per place. [2025-04-13 20:26:08,374 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1860 selfloop transitions, 92 changer transitions 3/1955 dead transitions. [2025-04-13 20:26:08,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1085 places, 1955 transitions, 46707 flow [2025-04-13 20:26:08,374 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-13 20:26:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-13 20:26:08,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 116 transitions. [2025-04-13 20:26:08,374 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28019323671497587 [2025-04-13 20:26:08,374 INFO L175 Difference]: Start difference. First operand has 1071 places, 1898 transitions, 39270 flow. Second operand 18 states and 116 transitions. [2025-04-13 20:26:08,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1085 places, 1955 transitions, 46707 flow [2025-04-13 20:26:18,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1062 places, 1955 transitions, 41758 flow, removed 2381 selfloop flow, removed 23 redundant places. [2025-04-13 20:26:18,129 INFO L231 Difference]: Finished difference. Result has 1065 places, 1919 transitions, 37130 flow [2025-04-13 20:26:18,130 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=35685, PETRI_DIFFERENCE_MINUEND_PLACES=1045, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=37130, PETRI_PLACES=1065, PETRI_TRANSITIONS=1919} [2025-04-13 20:26:18,130 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1043 predicate places. [2025-04-13 20:26:18,130 INFO L485 AbstractCegarLoop]: Abstraction has has 1065 places, 1919 transitions, 37130 flow [2025-04-13 20:26:18,131 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 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 20:26:18,131 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:26:18,131 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:26:18,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2025-04-13 20:26:18,331 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:26:18,331 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:26:18,332 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:26:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash 28650481, now seen corresponding path program 48 times [2025-04-13 20:26:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:26:18,332 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239949399] [2025-04-13 20:26:18,332 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:26:18,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:26:18,337 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:26:18,344 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:26:18,344 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:26:18,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:26:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:26:18,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:26:18,517 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239949399] [2025-04-13 20:26:18,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239949399] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:26:18,517 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452729875] [2025-04-13 20:26:18,517 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:26:18,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:26:18,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:26:18,519 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:26:18,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2025-04-13 20:26:18,576 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:26:18,589 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:26:18,589 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:26:18,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:26:18,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-13 20:26:18,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:26:18,706 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:26:18,706 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 15 treesize of output 14 [2025-04-13 20:26:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:26:18,721 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:26:18,793 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:26:18,794 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 21 treesize of output 14 [2025-04-13 20:26:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:26:18,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452729875] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:26:18,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:26:18,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 26 [2025-04-13 20:26:18,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937425675] [2025-04-13 20:26:18,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:26:18,823 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:26:18,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:26:18,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:26:18,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:26:18,824 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:26:18,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1065 places, 1919 transitions, 37130 flow. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 20:26:18,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:26:18,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:26:18,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:26:23,300 INFO L116 PetriNetUnfolderBase]: 4390/7690 cut-off events. [2025-04-13 20:26:23,300 INFO L117 PetriNetUnfolderBase]: For 908446/908446 co-relation queries the response was YES. [2025-04-13 20:26:23,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107818 conditions, 7690 events. 4390/7690 cut-off events. For 908446/908446 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 55667 event pairs, 292 based on Foata normal form. 2/7622 useless extension candidates. Maximal degree in co-relation 107506. Up to 7192 conditions per place. [2025-04-13 20:26:23,428 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1826 selfloop transitions, 199 changer transitions 8/2033 dead transitions. [2025-04-13 20:26:23,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1100 places, 2033 transitions, 45846 flow [2025-04-13 20:26:23,428 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:26:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:26:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 230 transitions. [2025-04-13 20:26:23,429 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2777777777777778 [2025-04-13 20:26:23,429 INFO L175 Difference]: Start difference. First operand has 1065 places, 1919 transitions, 37130 flow. Second operand 36 states and 230 transitions. [2025-04-13 20:26:23,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1100 places, 2033 transitions, 45846 flow [2025-04-13 20:26:31,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1092 places, 2033 transitions, 44998 flow, removed 396 selfloop flow, removed 8 redundant places. [2025-04-13 20:26:31,988 INFO L231 Difference]: Finished difference. Result has 1101 places, 1966 transitions, 40274 flow [2025-04-13 20:26:31,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=36282, PETRI_DIFFERENCE_MINUEND_PLACES=1057, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1750, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=40274, PETRI_PLACES=1101, PETRI_TRANSITIONS=1966} [2025-04-13 20:26:31,990 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1079 predicate places. [2025-04-13 20:26:31,990 INFO L485 AbstractCegarLoop]: Abstraction has has 1101 places, 1966 transitions, 40274 flow [2025-04-13 20:26:31,990 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 20:26:31,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:26:31,990 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:26:32,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2025-04-13 20:26:32,190 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:26:32,190 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:26:32,191 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:26:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2050605089, now seen corresponding path program 49 times [2025-04-13 20:26:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:26:32,191 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375191134] [2025-04-13 20:26:32,191 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:26:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:26:32,196 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:26:32,200 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:26:32,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:26:32,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:26:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:26:32,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:26:32,451 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375191134] [2025-04-13 20:26:32,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375191134] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:26:32,451 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159630830] [2025-04-13 20:26:32,451 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:26:32,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:26:32,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:26:32,452 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:26:32,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2025-04-13 20:26:32,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:26:32,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:26:32,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:26:32,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:26:32,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:26:32,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:26:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:26:32,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:26:32,718 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:26:32,718 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 35 treesize of output 43 [2025-04-13 20:26:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:26:32,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159630830] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:26:32,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:26:32,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:26:32,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021499883] [2025-04-13 20:26:32,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:26:32,745 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:26:32,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:26:32,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:26:32,746 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:26:32,746 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:26:32,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1101 places, 1966 transitions, 40274 flow. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 20:26:32,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:26:32,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:26:32,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:26:37,565 INFO L116 PetriNetUnfolderBase]: 4522/7907 cut-off events. [2025-04-13 20:26:37,566 INFO L117 PetriNetUnfolderBase]: For 989408/989408 co-relation queries the response was YES. [2025-04-13 20:26:37,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114320 conditions, 7907 events. 4522/7907 cut-off events. For 989408/989408 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 57206 event pairs, 330 based on Foata normal form. 4/7841 useless extension candidates. Maximal degree in co-relation 113998. Up to 7356 conditions per place. [2025-04-13 20:26:37,699 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1843 selfloop transitions, 210 changer transitions 5/2058 dead transitions. [2025-04-13 20:26:37,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1120 places, 2058 transitions, 47757 flow [2025-04-13 20:26:37,700 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-13 20:26:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-13 20:26:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 160 transitions. [2025-04-13 20:26:37,700 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.30245746691871456 [2025-04-13 20:26:37,701 INFO L175 Difference]: Start difference. First operand has 1101 places, 1966 transitions, 40274 flow. Second operand 23 states and 160 transitions. [2025-04-13 20:26:37,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1120 places, 2058 transitions, 47757 flow [2025-04-13 20:26:48,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1108 places, 2058 transitions, 45329 flow, removed 1154 selfloop flow, removed 12 redundant places. [2025-04-13 20:26:48,516 INFO L231 Difference]: Finished difference. Result has 1112 places, 1993 transitions, 39875 flow [2025-04-13 20:26:48,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=37824, PETRI_DIFFERENCE_MINUEND_PLACES=1086, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=39875, PETRI_PLACES=1112, PETRI_TRANSITIONS=1993} [2025-04-13 20:26:48,517 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1090 predicate places. [2025-04-13 20:26:48,517 INFO L485 AbstractCegarLoop]: Abstraction has has 1112 places, 1993 transitions, 39875 flow [2025-04-13 20:26:48,517 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 20:26:48,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:26:48,518 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:26:48,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2025-04-13 20:26:48,718 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2025-04-13 20:26:48,718 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:26:48,719 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:26:48,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2131195723, now seen corresponding path program 50 times [2025-04-13 20:26:48,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:26:48,719 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65104343] [2025-04-13 20:26:48,719 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:26:48,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:26:48,723 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:26:48,727 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:26:48,727 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:26:48,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:26:49,007 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 20:26:49,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:26:49,008 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65104343] [2025-04-13 20:26:49,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65104343] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:26:49,008 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900099873] [2025-04-13 20:26:49,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:26:49,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:26:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:26:49,010 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:26:49,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2025-04-13 20:26:49,065 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:26:49,077 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:26:49,078 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:26:49,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:26:49,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-04-13 20:26:49,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:26:49,183 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:26:49,183 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 15 treesize of output 14 [2025-04-13 20:26:49,214 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 20:26:49,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:26:49,306 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:26:49,306 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 17 treesize of output 14 [2025-04-13 20:26:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:26:49,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900099873] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:26:49,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:26:49,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 29 [2025-04-13 20:26:49,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176933653] [2025-04-13 20:26:49,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:26:49,329 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-13 20:26:49,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:26:49,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-13 20:26:49,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2025-04-13 20:26:49,329 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:26:49,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1112 places, 1993 transitions, 39875 flow. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 20:26:49,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:26:49,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:26:49,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:26:54,296 INFO L116 PetriNetUnfolderBase]: 4540/7951 cut-off events. [2025-04-13 20:26:54,296 INFO L117 PetriNetUnfolderBase]: For 981791/981791 co-relation queries the response was YES. [2025-04-13 20:26:54,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112342 conditions, 7951 events. 4540/7951 cut-off events. For 981791/981791 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 57661 event pairs, 292 based on Foata normal form. 2/7883 useless extension candidates. Maximal degree in co-relation 112017. Up to 7236 conditions per place. [2025-04-13 20:26:54,439 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1651 selfloop transitions, 385 changer transitions 10/2046 dead transitions. [2025-04-13 20:26:54,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1142 places, 2046 transitions, 44252 flow [2025-04-13 20:26:54,439 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-13 20:26:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-13 20:26:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 176 transitions. [2025-04-13 20:26:54,440 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2391304347826087 [2025-04-13 20:26:54,440 INFO L175 Difference]: Start difference. First operand has 1112 places, 1993 transitions, 39875 flow. Second operand 32 states and 176 transitions. [2025-04-13 20:26:54,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1142 places, 2046 transitions, 44252 flow [2025-04-13 20:27:04,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1127 places, 2046 transitions, 43111 flow, removed 469 selfloop flow, removed 15 redundant places. [2025-04-13 20:27:04,903 INFO L231 Difference]: Finished difference. Result has 1133 places, 2006 transitions, 39864 flow [2025-04-13 20:27:04,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38734, PETRI_DIFFERENCE_MINUEND_PLACES=1096, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=39864, PETRI_PLACES=1133, PETRI_TRANSITIONS=2006} [2025-04-13 20:27:04,904 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1111 predicate places. [2025-04-13 20:27:04,904 INFO L485 AbstractCegarLoop]: Abstraction has has 1133 places, 2006 transitions, 39864 flow [2025-04-13 20:27:04,904 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 20:27:04,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:27:04,904 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:27:04,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2025-04-13 20:27:05,105 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2025-04-13 20:27:05,105 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:27:05,106 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:27:05,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1548691249, now seen corresponding path program 51 times [2025-04-13 20:27:05,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:27:05,106 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950194637] [2025-04-13 20:27:05,106 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:27:05,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:27:05,113 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:27:05,122 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:27:05,122 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:27:05,122 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:27:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:05,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:27:05,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950194637] [2025-04-13 20:27:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950194637] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:27:05,296 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251538866] [2025-04-13 20:27:05,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:27:05,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:27:05,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:27:05,297 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:27:05,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2025-04-13 20:27:05,358 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:27:05,370 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:27:05,370 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:27:05,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:27:05,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:27:05,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:27:05,394 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:27:05,504 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:27:05,504 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 15 treesize of output 14 [2025-04-13 20:27:05,520 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 20:27:05,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:27:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:05,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251538866] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:27:05,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:27:05,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 28 [2025-04-13 20:27:05,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18818338] [2025-04-13 20:27:05,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:27:05,671 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-13 20:27:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:27:05,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-13 20:27:05,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2025-04-13 20:27:05,672 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:27:05,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1133 places, 2006 transitions, 39864 flow. Second operand has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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 20:27:05,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:27:05,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:27:05,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:27:10,863 INFO L116 PetriNetUnfolderBase]: 4627/8099 cut-off events. [2025-04-13 20:27:10,863 INFO L117 PetriNetUnfolderBase]: For 1031346/1031346 co-relation queries the response was YES. [2025-04-13 20:27:10,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118511 conditions, 8099 events. 4627/8099 cut-off events. For 1031346/1031346 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 58879 event pairs, 328 based on Foata normal form. 2/8031 useless extension candidates. Maximal degree in co-relation 118179. Up to 7831 conditions per place. [2025-04-13 20:27:11,012 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1994 selfloop transitions, 95 changer transitions 7/2096 dead transitions. [2025-04-13 20:27:11,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1163 places, 2096 transitions, 48296 flow [2025-04-13 20:27:11,012 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-13 20:27:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-04-13 20:27:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 206 transitions. [2025-04-13 20:27:11,013 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27140974967061926 [2025-04-13 20:27:11,013 INFO L175 Difference]: Start difference. First operand has 1133 places, 2006 transitions, 39864 flow. Second operand 33 states and 206 transitions. [2025-04-13 20:27:11,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1163 places, 2096 transitions, 48296 flow [2025-04-13 20:27:21,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1140 places, 2096 transitions, 47860 flow, removed 46 selfloop flow, removed 23 redundant places. [2025-04-13 20:27:21,367 INFO L231 Difference]: Finished difference. Result has 1150 places, 2040 transitions, 42776 flow [2025-04-13 20:27:21,368 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=39428, PETRI_DIFFERENCE_MINUEND_PLACES=1108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=42776, PETRI_PLACES=1150, PETRI_TRANSITIONS=2040} [2025-04-13 20:27:21,369 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1128 predicate places. [2025-04-13 20:27:21,369 INFO L485 AbstractCegarLoop]: Abstraction has has 1150 places, 2040 transitions, 42776 flow [2025-04-13 20:27:21,369 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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 20:27:21,369 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:27:21,369 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:27:21,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2025-04-13 20:27:21,569 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2025-04-13 20:27:21,569 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:27:21,570 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:27:21,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2037049859, now seen corresponding path program 52 times [2025-04-13 20:27:21,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:27:21,570 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552054296] [2025-04-13 20:27:21,570 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:27:21,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:27:21,575 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:27:21,578 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 20:27:21,578 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:27:21,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:27:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:21,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:27:21,763 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552054296] [2025-04-13 20:27:21,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552054296] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:27:21,763 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240228130] [2025-04-13 20:27:21,763 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:27:21,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:27:21,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:27:21,765 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:27:21,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2025-04-13 20:27:21,823 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:27:21,835 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 20:27:21,835 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:27:21,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:27:21,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:27:21,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:27:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:21,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:27:22,023 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:27:22,023 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 35 treesize of output 43 [2025-04-13 20:27:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:22,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240228130] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:27:22,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:27:22,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 25 [2025-04-13 20:27:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578094088] [2025-04-13 20:27:22,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:27:22,046 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-13 20:27:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:27:22,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-13 20:27:22,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2025-04-13 20:27:22,047 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:27:22,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1150 places, 2040 transitions, 42776 flow. Second operand has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 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 20:27:22,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:27:22,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:27:22,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:27:27,457 INFO L116 PetriNetUnfolderBase]: 4633/8111 cut-off events. [2025-04-13 20:27:27,457 INFO L117 PetriNetUnfolderBase]: For 1151102/1151102 co-relation queries the response was YES. [2025-04-13 20:27:27,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120904 conditions, 8111 events. 4633/8111 cut-off events. For 1151102/1151102 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 58967 event pairs, 354 based on Foata normal form. 1/8042 useless extension candidates. Maximal degree in co-relation 120564. Up to 7545 conditions per place. [2025-04-13 20:27:27,630 INFO L140 encePairwiseOnDemand]: 13/23 looper letters, 1835 selfloop transitions, 225 changer transitions 2/2062 dead transitions. [2025-04-13 20:27:27,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1164 places, 2062 transitions, 47518 flow [2025-04-13 20:27:27,631 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 20:27:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-13 20:27:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 111 transitions. [2025-04-13 20:27:27,631 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3016304347826087 [2025-04-13 20:27:27,631 INFO L175 Difference]: Start difference. First operand has 1150 places, 2040 transitions, 42776 flow. Second operand 16 states and 111 transitions. [2025-04-13 20:27:27,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1164 places, 2062 transitions, 47518 flow [2025-04-13 20:27:40,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1148 places, 2062 transitions, 45026 flow, removed 1203 selfloop flow, removed 16 redundant places. [2025-04-13 20:27:40,378 INFO L231 Difference]: Finished difference. Result has 1148 places, 2042 transitions, 41093 flow [2025-04-13 20:27:40,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=40269, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=41093, PETRI_PLACES=1148, PETRI_TRANSITIONS=2042} [2025-04-13 20:27:40,379 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1126 predicate places. [2025-04-13 20:27:40,379 INFO L485 AbstractCegarLoop]: Abstraction has has 1148 places, 2042 transitions, 41093 flow [2025-04-13 20:27:40,379 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6666666666666665) internal successors, (99), 27 states have internal predecessors, (99), 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 20:27:40,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:27:40,379 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:27:40,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2025-04-13 20:27:40,580 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:27:40,580 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:27:40,581 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:27:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1969832163, now seen corresponding path program 53 times [2025-04-13 20:27:40,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:27:40,581 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485827352] [2025-04-13 20:27:40,581 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:27:40,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:27:40,586 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:27:40,590 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:27:40,590 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:27:40,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:27:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:27:40,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:27:40,835 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485827352] [2025-04-13 20:27:40,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485827352] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:27:40,836 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853307735] [2025-04-13 20:27:40,836 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:27:40,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:27:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:27:40,837 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:27:40,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2025-04-13 20:27:40,897 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:27:40,909 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:27:40,909 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:27:40,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:27:40,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-13 20:27:40,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:27:41,045 INFO L325 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2025-04-13 20:27:41,046 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 36 treesize of output 33 [2025-04-13 20:27:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:41,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:27:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:41,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853307735] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:27:41,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:27:41,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 21 [2025-04-13 20:27:41,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192022043] [2025-04-13 20:27:41,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:27:41,114 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-13 20:27:41,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:27:41,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-13 20:27:41,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2025-04-13 20:27:41,115 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:27:41,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1148 places, 2042 transitions, 41093 flow. Second operand has 23 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 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 20:27:41,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:27:41,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:27:41,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:27:46,190 INFO L116 PetriNetUnfolderBase]: 4649/8138 cut-off events. [2025-04-13 20:27:46,191 INFO L117 PetriNetUnfolderBase]: For 1141848/1141848 co-relation queries the response was YES. [2025-04-13 20:27:46,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119228 conditions, 8138 events. 4649/8138 cut-off events. For 1141848/1141848 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 59193 event pairs, 312 based on Foata normal form. 2/8064 useless extension candidates. Maximal degree in co-relation 118889. Up to 7911 conditions per place. [2025-04-13 20:27:46,339 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1948 selfloop transitions, 121 changer transitions 6/2075 dead transitions. [2025-04-13 20:27:46,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1167 places, 2075 transitions, 46171 flow [2025-04-13 20:27:46,340 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 20:27:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 20:27:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 127 transitions. [2025-04-13 20:27:46,340 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2629399585921325 [2025-04-13 20:27:46,340 INFO L175 Difference]: Start difference. First operand has 1148 places, 2042 transitions, 41093 flow. Second operand 21 states and 127 transitions. [2025-04-13 20:27:46,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1167 places, 2075 transitions, 46171 flow [2025-04-13 20:27:57,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1155 places, 2075 transitions, 45666 flow, removed 140 selfloop flow, removed 12 redundant places. [2025-04-13 20:27:57,790 INFO L231 Difference]: Finished difference. Result has 1158 places, 2049 transitions, 41591 flow [2025-04-13 20:27:57,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=40578, PETRI_DIFFERENCE_MINUEND_PLACES=1135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=41591, PETRI_PLACES=1158, PETRI_TRANSITIONS=2049} [2025-04-13 20:27:57,791 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1136 predicate places. [2025-04-13 20:27:57,791 INFO L485 AbstractCegarLoop]: Abstraction has has 1158 places, 2049 transitions, 41591 flow [2025-04-13 20:27:57,791 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 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 20:27:57,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:27:57,791 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:27:57,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2025-04-13 20:27:57,992 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:27:57,992 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:27:57,993 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:27:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash 105511261, now seen corresponding path program 54 times [2025-04-13 20:27:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:27:57,993 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074902263] [2025-04-13 20:27:57,993 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:27:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:27:57,997 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:27:58,001 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:27:58,001 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:27:58,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:27:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:58,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:27:58,207 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074902263] [2025-04-13 20:27:58,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074902263] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:27:58,207 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868838919] [2025-04-13 20:27:58,207 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:27:58,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:27:58,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:27:58,209 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:27:58,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2025-04-13 20:27:58,271 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:27:58,284 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:27:58,284 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:27:58,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:27:58,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-04-13 20:27:58,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:27:58,379 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:27:58,380 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 15 treesize of output 14 [2025-04-13 20:27:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:58,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:27:58,508 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:27:58,508 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 21 treesize of output 14 [2025-04-13 20:27:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:27:58,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868838919] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:27:58,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:27:58,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 24 [2025-04-13 20:27:58,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286453877] [2025-04-13 20:27:58,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:27:58,535 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-13 20:27:58,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:27:58,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-13 20:27:58,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2025-04-13 20:27:58,536 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:27:58,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1158 places, 2049 transitions, 41591 flow. Second operand has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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 20:27:58,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:27:58,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:27:58,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:28:04,233 INFO L116 PetriNetUnfolderBase]: 4786/8407 cut-off events. [2025-04-13 20:28:04,233 INFO L117 PetriNetUnfolderBase]: For 1330976/1330976 co-relation queries the response was YES. [2025-04-13 20:28:04,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128197 conditions, 8407 events. 4786/8407 cut-off events. For 1330976/1330976 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 61706 event pairs, 288 based on Foata normal form. 2/8333 useless extension candidates. Maximal degree in co-relation 127855. Up to 7488 conditions per place. [2025-04-13 20:28:04,389 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 1856 selfloop transitions, 320 changer transitions 9/2185 dead transitions. [2025-04-13 20:28:04,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1194 places, 2185 transitions, 52004 flow [2025-04-13 20:28:04,389 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-04-13 20:28:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-04-13 20:28:04,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 254 transitions. [2025-04-13 20:28:04,390 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2906178489702517 [2025-04-13 20:28:04,390 INFO L175 Difference]: Start difference. First operand has 1158 places, 2049 transitions, 41591 flow. Second operand 38 states and 254 transitions. [2025-04-13 20:28:04,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1194 places, 2185 transitions, 52004 flow [2025-04-13 20:28:18,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1181 places, 2185 transitions, 51267 flow, removed 292 selfloop flow, removed 13 redundant places. [2025-04-13 20:28:18,683 INFO L231 Difference]: Finished difference. Result has 1192 places, 2106 transitions, 45828 flow [2025-04-13 20:28:18,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=40860, PETRI_DIFFERENCE_MINUEND_PLACES=1144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2049, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=45828, PETRI_PLACES=1192, PETRI_TRANSITIONS=2106} [2025-04-13 20:28:18,684 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1170 predicate places. [2025-04-13 20:28:18,684 INFO L485 AbstractCegarLoop]: Abstraction has has 1192 places, 2106 transitions, 45828 flow [2025-04-13 20:28:18,684 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 26 states have internal predecessors, (96), 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 20:28:18,684 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:28:18,684 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:28:18,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2025-04-13 20:28:18,885 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:28:18,885 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:28:18,886 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:28:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash -499081743, now seen corresponding path program 55 times [2025-04-13 20:28:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:28:18,886 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236049454] [2025-04-13 20:28:18,886 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:28:18,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:28:18,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:28:18,894 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:28:18,894 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:28:18,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:28:19,130 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 20:28:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:28:19,130 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236049454] [2025-04-13 20:28:19,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236049454] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:28:19,130 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756748342] [2025-04-13 20:28:19,130 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:28:19,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:28:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:28:19,132 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:28:19,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2025-04-13 20:28:19,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:28:19,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:28:19,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:28:19,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:28:19,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:28:19,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:28:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:28:19,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:28:19,363 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:28:19,363 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 42 treesize of output 45 [2025-04-13 20:28:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:28:19,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756748342] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:28:19,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:28:19,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 24 [2025-04-13 20:28:19,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049909235] [2025-04-13 20:28:19,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:28:19,400 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-13 20:28:19,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:28:19,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-13 20:28:19,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-04-13 20:28:19,400 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:28:19,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1192 places, 2106 transitions, 45828 flow. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 20:28:19,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:28:19,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:28:19,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:28:25,339 INFO L116 PetriNetUnfolderBase]: 4850/8510 cut-off events. [2025-04-13 20:28:25,340 INFO L117 PetriNetUnfolderBase]: For 1464773/1464773 co-relation queries the response was YES. [2025-04-13 20:28:25,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133885 conditions, 8510 events. 4850/8510 cut-off events. For 1464773/1464773 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 62452 event pairs, 337 based on Foata normal form. 2/8440 useless extension candidates. Maximal degree in co-relation 133532. Up to 8204 conditions per place. [2025-04-13 20:28:25,487 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 2068 selfloop transitions, 111 changer transitions 3/2182 dead transitions. [2025-04-13 20:28:25,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1216 places, 2182 transitions, 53815 flow [2025-04-13 20:28:25,487 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-13 20:28:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-13 20:28:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 171 transitions. [2025-04-13 20:28:25,488 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29739130434782607 [2025-04-13 20:28:25,488 INFO L175 Difference]: Start difference. First operand has 1192 places, 2106 transitions, 45828 flow. Second operand 25 states and 171 transitions. [2025-04-13 20:28:25,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1216 places, 2182 transitions, 53815 flow [2025-04-13 20:28:39,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1197 places, 2182 transitions, 51189 flow, removed 1207 selfloop flow, removed 19 redundant places. [2025-04-13 20:28:39,260 INFO L231 Difference]: Finished difference. Result has 1201 places, 2129 transitions, 45470 flow [2025-04-13 20:28:39,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=43202, PETRI_DIFFERENCE_MINUEND_PLACES=1173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2011, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=45470, PETRI_PLACES=1201, PETRI_TRANSITIONS=2129} [2025-04-13 20:28:39,261 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1179 predicate places. [2025-04-13 20:28:39,261 INFO L485 AbstractCegarLoop]: Abstraction has has 1201 places, 2129 transitions, 45470 flow [2025-04-13 20:28:39,261 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 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 20:28:39,261 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:28:39,261 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:28:39,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2025-04-13 20:28:39,461 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2025-04-13 20:28:39,462 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:28:39,462 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:28:39,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1140053153, now seen corresponding path program 56 times [2025-04-13 20:28:39,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:28:39,462 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241084802] [2025-04-13 20:28:39,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:28:39,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:28:39,467 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:28:39,471 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:28:39,471 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:28:39,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:28:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:28:39,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:28:39,617 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241084802] [2025-04-13 20:28:39,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241084802] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:28:39,618 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761792870] [2025-04-13 20:28:39,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:28:39,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:28:39,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:28:39,619 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:28:39,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2025-04-13 20:28:39,678 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:28:39,690 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:28:39,690 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:28:39,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:28:39,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:28:39,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:28:39,711 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:28:39,806 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:28:39,806 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 17 treesize of output 14 [2025-04-13 20:28:39,821 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 20:28:39,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:28:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:28:39,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761792870] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:28:39,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:28:39,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 9] total 26 [2025-04-13 20:28:39,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868997855] [2025-04-13 20:28:39,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:28:39,945 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:28:39,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:28:39,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:28:39,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:28:39,945 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:28:39,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1201 places, 2129 transitions, 45470 flow. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 20:28:39,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:28:39,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:28:39,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:28:46,243 INFO L116 PetriNetUnfolderBase]: 4945/8689 cut-off events. [2025-04-13 20:28:46,243 INFO L117 PetriNetUnfolderBase]: For 1514519/1514519 co-relation queries the response was YES. [2025-04-13 20:28:46,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136702 conditions, 8689 events. 4945/8689 cut-off events. For 1514519/1514519 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 64072 event pairs, 336 based on Foata normal form. 6/8623 useless extension candidates. Maximal degree in co-relation 136346. Up to 7907 conditions per place. [2025-04-13 20:28:46,413 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1850 selfloop transitions, 383 changer transitions 9/2242 dead transitions. [2025-04-13 20:28:46,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1241 places, 2242 transitions, 54925 flow [2025-04-13 20:28:46,413 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-04-13 20:28:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-04-13 20:28:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 247 transitions. [2025-04-13 20:28:46,414 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26193001060445387 [2025-04-13 20:28:46,414 INFO L175 Difference]: Start difference. First operand has 1201 places, 2129 transitions, 45470 flow. Second operand 41 states and 247 transitions. [2025-04-13 20:28:46,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1241 places, 2242 transitions, 54925 flow [2025-04-13 20:29:03,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1232 places, 2242 transitions, 53574 flow, removed 650 selfloop flow, removed 9 redundant places. [2025-04-13 20:29:03,869 INFO L231 Difference]: Finished difference. Result has 1242 places, 2187 transitions, 49287 flow [2025-04-13 20:29:03,869 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44111, PETRI_DIFFERENCE_MINUEND_PLACES=1192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=49287, PETRI_PLACES=1242, PETRI_TRANSITIONS=2187} [2025-04-13 20:29:03,870 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1220 predicate places. [2025-04-13 20:29:03,870 INFO L485 AbstractCegarLoop]: Abstraction has has 1242 places, 2187 transitions, 49287 flow [2025-04-13 20:29:03,870 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 20:29:03,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:29:03,870 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:29:03,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2025-04-13 20:29:04,070 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:29:04,070 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:29:04,071 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:29:04,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1465575813, now seen corresponding path program 57 times [2025-04-13 20:29:04,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:29:04,071 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61654543] [2025-04-13 20:29:04,071 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:29:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:29:04,076 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:29:04,081 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:29:04,081 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 20:29:04,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:29:04,404 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 20:29:04,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:29:04,404 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61654543] [2025-04-13 20:29:04,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61654543] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:29:04,404 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791389805] [2025-04-13 20:29:04,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:29:04,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:29:04,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:29:04,406 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:29:04,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2025-04-13 20:29:04,466 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-04-13 20:29:04,479 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:29:04,479 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 20:29:04,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:29:04,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-04-13 20:29:04,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:29:04,507 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:29:04,617 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:29:04,617 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 15 treesize of output 14 [2025-04-13 20:29:04,634 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 20:29:04,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:29:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:29:04,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791389805] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:29:04,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:29:04,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 29 [2025-04-13 20:29:04,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140391856] [2025-04-13 20:29:04,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:29:04,832 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-04-13 20:29:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:29:04,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-04-13 20:29:04,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2025-04-13 20:29:04,833 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:29:04,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1242 places, 2187 transitions, 49287 flow. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 20:29:04,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:29:04,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:29:04,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:29:09,427 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:29:13,755 WARN L532 Checker$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 20:29:17,775 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:29:21,787 WARN L532 Checker$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 20:29:25,898 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:29:30,610 WARN L532 Checker$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 20:29:34,628 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:29:38,638 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:29:43,393 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:29:47,409 WARN L532 Checker$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 20:29:51,422 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 20:29:57,415 INFO L116 PetriNetUnfolderBase]: 5200/9080 cut-off events. [2025-04-13 20:29:57,415 INFO L117 PetriNetUnfolderBase]: For 1769369/1769369 co-relation queries the response was YES. [2025-04-13 20:29:57,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150508 conditions, 9080 events. 5200/9080 cut-off events. For 1769369/1769369 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 67016 event pairs, 356 based on Foata normal form. 4/9010 useless extension candidates. Maximal degree in co-relation 150141. Up to 7869 conditions per place. [2025-04-13 20:29:57,592 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1912 selfloop transitions, 468 changer transitions 7/2387 dead transitions. [2025-04-13 20:29:57,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1285 places, 2387 transitions, 63718 flow [2025-04-13 20:29:57,592 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-04-13 20:29:57,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-04-13 20:29:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 280 transitions. [2025-04-13 20:29:57,593 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27053140096618356 [2025-04-13 20:29:57,593 INFO L175 Difference]: Start difference. First operand has 1242 places, 2187 transitions, 49287 flow. Second operand 45 states and 280 transitions. [2025-04-13 20:29:57,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1285 places, 2387 transitions, 63718 flow [2025-04-13 20:30:19,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1261 places, 2387 transitions, 60228 flow, removed 1614 selfloop flow, removed 24 redundant places. [2025-04-13 20:30:19,534 INFO L231 Difference]: Finished difference. Result has 1278 places, 2323 transitions, 56056 flow [2025-04-13 20:30:19,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=45786, PETRI_DIFFERENCE_MINUEND_PLACES=1217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=56056, PETRI_PLACES=1278, PETRI_TRANSITIONS=2323} [2025-04-13 20:30:19,535 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1256 predicate places. [2025-04-13 20:30:19,535 INFO L485 AbstractCegarLoop]: Abstraction has has 1278 places, 2323 transitions, 56056 flow [2025-04-13 20:30:19,536 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 31 states have internal predecessors, (110), 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 20:30:19,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:30:19,536 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:30:19,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2025-04-13 20:30:19,736 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2025-04-13 20:30:19,736 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:30:19,737 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:30:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1578116167, now seen corresponding path program 58 times [2025-04-13 20:30:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:30:19,737 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469931273] [2025-04-13 20:30:19,737 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:30:19,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:30:19,742 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:30:19,746 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 20:30:19,746 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:30:19,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:30:20,095 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 20:30:20,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:30:20,096 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469931273] [2025-04-13 20:30:20,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469931273] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:30:20,096 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302486334] [2025-04-13 20:30:20,096 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:30:20,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:30:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:30:20,098 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:30:20,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2025-04-13 20:30:20,158 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:30:20,170 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 20:30:20,170 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:30:20,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:30:20,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:30:20,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:30:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:30:20,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:30:20,449 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:30:20,449 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 35 treesize of output 43 [2025-04-13 20:30:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:30:20,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302486334] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:30:20,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:30:20,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:30:20,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476124817] [2025-04-13 20:30:20,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:30:20,477 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:30:20,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:30:20,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:30:20,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:30:20,477 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:30:20,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1278 places, 2323 transitions, 56056 flow. Second operand has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:30:20,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:30:20,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:30:20,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:30:29,452 INFO L116 PetriNetUnfolderBase]: 5847/10102 cut-off events. [2025-04-13 20:30:29,452 INFO L117 PetriNetUnfolderBase]: For 2164560/2164560 co-relation queries the response was YES. [2025-04-13 20:30:29,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177170 conditions, 10102 events. 5847/10102 cut-off events. For 2164560/2164560 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 75119 event pairs, 342 based on Foata normal form. 19/10045 useless extension candidates. Maximal degree in co-relation 176788. Up to 8843 conditions per place. [2025-04-13 20:30:29,652 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 2294 selfloop transitions, 382 changer transitions 13/2689 dead transitions. [2025-04-13 20:30:29,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1321 places, 2689 transitions, 77508 flow [2025-04-13 20:30:29,653 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-04-13 20:30:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-04-13 20:30:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 297 transitions. [2025-04-13 20:30:29,653 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28695652173913044 [2025-04-13 20:30:29,653 INFO L175 Difference]: Start difference. First operand has 1278 places, 2323 transitions, 56056 flow. Second operand 45 states and 297 transitions. [2025-04-13 20:30:29,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1321 places, 2689 transitions, 77508 flow [2025-04-13 20:30:59,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1300 places, 2689 transitions, 65571 flow, removed 5705 selfloop flow, removed 21 redundant places. [2025-04-13 20:30:59,723 INFO L231 Difference]: Finished difference. Result has 1314 places, 2537 transitions, 58578 flow [2025-04-13 20:30:59,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=48662, PETRI_DIFFERENCE_MINUEND_PLACES=1256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1994, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=58578, PETRI_PLACES=1314, PETRI_TRANSITIONS=2537} [2025-04-13 20:30:59,724 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1292 predicate places. [2025-04-13 20:30:59,725 INFO L485 AbstractCegarLoop]: Abstraction has has 1314 places, 2537 transitions, 58578 flow [2025-04-13 20:30:59,725 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 28 states have internal predecessors, (101), 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 20:30:59,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:30:59,725 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:30:59,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2025-04-13 20:30:59,925 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2025-04-13 20:30:59,925 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:30:59,926 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:30:59,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1283273427, now seen corresponding path program 59 times [2025-04-13 20:30:59,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:30:59,926 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780036795] [2025-04-13 20:30:59,927 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:30:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:30:59,931 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:30:59,936 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:30:59,936 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:30:59,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:31:00,199 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 20:31:00,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:31:00,199 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780036795] [2025-04-13 20:31:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780036795] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:31:00,199 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275571085] [2025-04-13 20:31:00,200 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:31:00,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:31:00,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:31:00,201 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:31:00,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2025-04-13 20:31:00,263 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:31:00,276 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:31:00,276 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:31:00,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:31:00,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-13 20:31:00,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:31:00,447 INFO L325 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2025-04-13 20:31:00,448 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 35 treesize of output 33 [2025-04-13 20:31:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:31:00,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:31:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:31:00,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275571085] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:31:00,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:31:00,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 22 [2025-04-13 20:31:00,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498635356] [2025-04-13 20:31:00,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:31:00,567 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-13 20:31:00,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:31:00,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-13 20:31:00,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2025-04-13 20:31:00,567 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:31:00,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1314 places, 2537 transitions, 58578 flow. Second operand has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 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 20:31:00,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:31:00,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:31:00,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:31:09,319 INFO L116 PetriNetUnfolderBase]: 5857/10116 cut-off events. [2025-04-13 20:31:09,319 INFO L117 PetriNetUnfolderBase]: For 1926283/1926283 co-relation queries the response was YES. [2025-04-13 20:31:09,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163903 conditions, 10116 events. 5857/10116 cut-off events. For 1926283/1926283 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 75499 event pairs, 325 based on Foata normal form. 2/10032 useless extension candidates. Maximal degree in co-relation 163508. Up to 9707 conditions per place. [2025-04-13 20:31:09,521 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 2384 selfloop transitions, 205 changer transitions 4/2593 dead transitions. [2025-04-13 20:31:09,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1346 places, 2593 transitions, 64435 flow [2025-04-13 20:31:09,522 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 20:31:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 20:31:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 206 transitions. [2025-04-13 20:31:09,523 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26342710997442453 [2025-04-13 20:31:09,523 INFO L175 Difference]: Start difference. First operand has 1314 places, 2537 transitions, 58578 flow. Second operand 34 states and 206 transitions. [2025-04-13 20:31:09,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1346 places, 2593 transitions, 64435 flow [2025-04-13 20:31:33,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1318 places, 2593 transitions, 59807 flow, removed 2190 selfloop flow, removed 28 redundant places. [2025-04-13 20:31:33,628 INFO L231 Difference]: Finished difference. Result has 1324 places, 2550 transitions, 55034 flow [2025-04-13 20:31:33,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=53941, PETRI_DIFFERENCE_MINUEND_PLACES=1285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=55034, PETRI_PLACES=1324, PETRI_TRANSITIONS=2550} [2025-04-13 20:31:33,629 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1302 predicate places. [2025-04-13 20:31:33,629 INFO L485 AbstractCegarLoop]: Abstraction has has 1324 places, 2550 transitions, 55034 flow [2025-04-13 20:31:33,629 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 24 states have internal predecessors, (86), 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 20:31:33,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:31:33,629 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:31:33,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2025-04-13 20:31:33,829 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2025-04-13 20:31:33,830 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:31:33,830 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:31:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1008743383, now seen corresponding path program 60 times [2025-04-13 20:31:33,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:31:33,831 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224308913] [2025-04-13 20:31:33,831 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:31:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:31:33,835 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:31:33,839 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:31:33,839 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:31:33,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:31:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:31:34,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:31:34,011 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224308913] [2025-04-13 20:31:34,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224308913] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:31:34,011 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647391122] [2025-04-13 20:31:34,011 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:31:34,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:31:34,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:31:34,013 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:31:34,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2025-04-13 20:31:34,075 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:31:34,087 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:31:34,087 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:31:34,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:31:34,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:31:34,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:31:34,116 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-13 20:31:34,241 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:31:34,241 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 17 treesize of output 14 [2025-04-13 20:31:34,261 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 20:31:34,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:31:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:31:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647391122] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:31:34,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:31:34,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 28 [2025-04-13 20:31:34,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288291792] [2025-04-13 20:31:34,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:31:34,444 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-13 20:31:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:31:34,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-13 20:31:34,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2025-04-13 20:31:34,445 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:31:34,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1324 places, 2550 transitions, 55034 flow. Second operand has 30 states, 30 states have (on average 3.566666666666667) internal successors, (107), 30 states have internal predecessors, (107), 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 20:31:34,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:31:34,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:31:34,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:31:43,150 INFO L116 PetriNetUnfolderBase]: 5947/10263 cut-off events. [2025-04-13 20:31:43,150 INFO L117 PetriNetUnfolderBase]: For 1820010/1820010 co-relation queries the response was YES. [2025-04-13 20:31:43,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161857 conditions, 10263 events. 5947/10263 cut-off events. For 1820010/1820010 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 76744 event pairs, 335 based on Foata normal form. 2/10179 useless extension candidates. Maximal degree in co-relation 161462. Up to 9762 conditions per place. [2025-04-13 20:31:43,359 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 2416 selfloop transitions, 240 changer transitions 4/2660 dead transitions. [2025-04-13 20:31:43,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1359 places, 2660 transitions, 65735 flow [2025-04-13 20:31:43,360 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-04-13 20:31:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-04-13 20:31:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 232 transitions. [2025-04-13 20:31:43,360 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27262044653349 [2025-04-13 20:31:43,360 INFO L175 Difference]: Start difference. First operand has 1324 places, 2550 transitions, 55034 flow. Second operand 37 states and 232 transitions. [2025-04-13 20:31:43,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1359 places, 2660 transitions, 65735 flow [2025-04-13 20:32:08,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1330 places, 2660 transitions, 65261 flow, removed 112 selfloop flow, removed 29 redundant places. [2025-04-13 20:32:08,571 INFO L231 Difference]: Finished difference. Result has 1342 places, 2610 transitions, 60164 flow [2025-04-13 20:32:08,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=54565, PETRI_DIFFERENCE_MINUEND_PLACES=1294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=60164, PETRI_PLACES=1342, PETRI_TRANSITIONS=2610} [2025-04-13 20:32:08,572 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1320 predicate places. [2025-04-13 20:32:08,572 INFO L485 AbstractCegarLoop]: Abstraction has has 1342 places, 2610 transitions, 60164 flow [2025-04-13 20:32:08,572 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.566666666666667) internal successors, (107), 30 states have internal predecessors, (107), 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 20:32:08,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:32:08,573 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:32:08,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2025-04-13 20:32:08,773 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2025-04-13 20:32:08,773 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:32:08,774 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:32:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1094443099, now seen corresponding path program 61 times [2025-04-13 20:32:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:32:08,774 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440169569] [2025-04-13 20:32:08,774 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:32:08,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:32:08,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:32:08,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:32:08,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:32:08,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:32:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:32:09,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:32:09,095 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440169569] [2025-04-13 20:32:09,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440169569] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:32:09,095 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984146588] [2025-04-13 20:32:09,095 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:32:09,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:32:09,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:32:09,097 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:32:09,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2025-04-13 20:32:09,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:32:09,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:32:09,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:32:09,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:32:09,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-13 20:32:09,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:32:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:32:09,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:32:09,394 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:32:09,394 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 42 treesize of output 45 [2025-04-13 20:32:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:32:09,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984146588] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:32:09,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:32:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 26 [2025-04-13 20:32:09,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941092201] [2025-04-13 20:32:09,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:32:09,439 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-13 20:32:09,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:32:09,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-13 20:32:09,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2025-04-13 20:32:09,439 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:32:09,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1342 places, 2610 transitions, 60164 flow. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 20:32:09,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:32:09,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:32:09,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:32:17,996 INFO L116 PetriNetUnfolderBase]: 6016/10369 cut-off events. [2025-04-13 20:32:17,997 INFO L117 PetriNetUnfolderBase]: For 1963015/1963015 co-relation queries the response was YES. [2025-04-13 20:32:18,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168673 conditions, 10369 events. 6016/10369 cut-off events. For 1963015/1963015 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 77481 event pairs, 377 based on Foata normal form. 3/10286 useless extension candidates. Maximal degree in co-relation 168268. Up to 9894 conditions per place. [2025-04-13 20:32:18,226 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 2547 selfloop transitions, 132 changer transitions 5/2684 dead transitions. [2025-04-13 20:32:18,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1362 places, 2684 transitions, 69042 flow [2025-04-13 20:32:18,226 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:32:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:32:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 153 transitions. [2025-04-13 20:32:18,227 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.30237154150197626 [2025-04-13 20:32:18,227 INFO L175 Difference]: Start difference. First operand has 1342 places, 2610 transitions, 60164 flow. Second operand 22 states and 153 transitions. [2025-04-13 20:32:18,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1362 places, 2684 transitions, 69042 flow [2025-04-13 20:32:45,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1345 places, 2684 transitions, 64931 flow, removed 1995 selfloop flow, removed 17 redundant places. [2025-04-13 20:32:45,425 INFO L231 Difference]: Finished difference. Result has 1349 places, 2623 transitions, 57918 flow [2025-04-13 20:32:45,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=56198, PETRI_DIFFERENCE_MINUEND_PLACES=1324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=57918, PETRI_PLACES=1349, PETRI_TRANSITIONS=2623} [2025-04-13 20:32:45,426 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1327 predicate places. [2025-04-13 20:32:45,426 INFO L485 AbstractCegarLoop]: Abstraction has has 1349 places, 2623 transitions, 57918 flow [2025-04-13 20:32:45,426 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 20:32:45,426 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:32:45,426 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:32:45,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2025-04-13 20:32:45,627 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:32:45,627 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:32:45,628 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:32:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash 138485071, now seen corresponding path program 62 times [2025-04-13 20:32:45,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:32:45,628 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704430319] [2025-04-13 20:32:45,628 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:32:45,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:32:45,633 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:32:45,635 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:32:45,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:32:45,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:32:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:32:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:32:45,680 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704430319] [2025-04-13 20:32:45,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704430319] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:32:45,680 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727707585] [2025-04-13 20:32:45,680 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:32:45,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:32:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:32:45,682 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:32:45,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2025-04-13 20:32:45,745 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:32:45,757 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:32:45,758 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:32:45,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:32:45,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-13 20:32:45,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:32:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:32:45,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:32:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:32:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727707585] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:32:45,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:32:45,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-04-13 20:32:45,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254745760] [2025-04-13 20:32:45,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:32:45,870 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 20:32:45,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:32:45,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 20:32:45,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2025-04-13 20:32:45,870 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:32:45,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1349 places, 2623 transitions, 57918 flow. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 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 20:32:45,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:32:45,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:32:45,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:32:58,345 INFO L116 PetriNetUnfolderBase]: 9028/15723 cut-off events. [2025-04-13 20:32:58,345 INFO L117 PetriNetUnfolderBase]: For 3386080/3386080 co-relation queries the response was YES. [2025-04-13 20:32:58,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252173 conditions, 15723 events. 9028/15723 cut-off events. For 3386080/3386080 co-relation queries the response was YES. Maximal size of possible extension queue 1236. Compared 125716 event pairs, 2878 based on Foata normal form. 485/16046 useless extension candidates. Maximal degree in co-relation 251763. Up to 8777 conditions per place. [2025-04-13 20:32:58,677 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 3746 selfloop transitions, 317 changer transitions 2/4065 dead transitions. [2025-04-13 20:32:58,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1355 places, 4065 transitions, 98760 flow [2025-04-13 20:32:58,677 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 20:32:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 20:32:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2025-04-13 20:32:58,677 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34782608695652173 [2025-04-13 20:32:58,677 INFO L175 Difference]: Start difference. First operand has 1349 places, 2623 transitions, 57918 flow. Second operand 9 states and 72 transitions. [2025-04-13 20:32:58,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1355 places, 4065 transitions, 98760 flow [2025-04-13 20:33:37,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1346 places, 4065 transitions, 96973 flow, removed 847 selfloop flow, removed 9 redundant places. [2025-04-13 20:33:37,376 INFO L231 Difference]: Finished difference. Result has 1349 places, 2809 transitions, 62131 flow [2025-04-13 20:33:37,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=55568, PETRI_DIFFERENCE_MINUEND_PLACES=1338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=62131, PETRI_PLACES=1349, PETRI_TRANSITIONS=2809} [2025-04-13 20:33:37,377 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1327 predicate places. [2025-04-13 20:33:37,377 INFO L485 AbstractCegarLoop]: Abstraction has has 1349 places, 2809 transitions, 62131 flow [2025-04-13 20:33:37,377 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 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 20:33:37,377 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:33:37,377 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:33:37,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2025-04-13 20:33:37,578 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:33:37,578 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:33:37,579 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:33:37,579 INFO L85 PathProgramCache]: Analyzing trace with hash -97089690, now seen corresponding path program 63 times [2025-04-13 20:33:37,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:33:37,579 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478052758] [2025-04-13 20:33:37,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:33:37,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:33:37,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-04-13 20:33:37,588 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 20:33:37,589 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 20:33:37,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:33:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:33:37,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:33:37,621 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478052758] [2025-04-13 20:33:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478052758] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:33:37,621 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867462816] [2025-04-13 20:33:37,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:33:37,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:33:37,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:33:37,623 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:33:37,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2025-04-13 20:33:37,689 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-04-13 20:33:37,703 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 20:33:37,703 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 20:33:37,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:33:37,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-13 20:33:37,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:33:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:33:37,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:33:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:33:37,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867462816] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:33:37,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:33:37,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-04-13 20:33:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774034833] [2025-04-13 20:33:37,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:33:37,764 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-13 20:33:37,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:33:37,764 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-13 20:33:37,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-04-13 20:33:37,764 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:33:37,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1349 places, 2809 transitions, 62131 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 20:33:37,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:33:37,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:33:37,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:33:51,432 INFO L116 PetriNetUnfolderBase]: 9362/16359 cut-off events. [2025-04-13 20:33:51,432 INFO L117 PetriNetUnfolderBase]: For 3276037/3276037 co-relation queries the response was YES. [2025-04-13 20:33:51,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267358 conditions, 16359 events. 9362/16359 cut-off events. For 3276037/3276037 co-relation queries the response was YES. Maximal size of possible extension queue 1251. Compared 132301 event pairs, 1843 based on Foata normal form. 6/16199 useless extension candidates. Maximal degree in co-relation 266944. Up to 8058 conditions per place. [2025-04-13 20:33:51,795 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 2449 selfloop transitions, 577 changer transitions 25/3051 dead transitions. [2025-04-13 20:33:51,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1355 places, 3051 transitions, 79122 flow [2025-04-13 20:33:51,795 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:33:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:33:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2025-04-13 20:33:51,796 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2025-04-13 20:33:51,796 INFO L175 Difference]: Start difference. First operand has 1349 places, 2809 transitions, 62131 flow. Second operand 7 states and 70 transitions. [2025-04-13 20:33:51,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1355 places, 3051 transitions, 79122 flow [2025-04-13 20:34:32,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1348 places, 3051 transitions, 78866 flow, removed 110 selfloop flow, removed 7 redundant places. [2025-04-13 20:34:32,821 INFO L231 Difference]: Finished difference. Result has 1351 places, 2830 transitions, 64728 flow [2025-04-13 20:34:32,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=61953, PETRI_DIFFERENCE_MINUEND_PLACES=1342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=64728, PETRI_PLACES=1351, PETRI_TRANSITIONS=2830} [2025-04-13 20:34:32,823 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 1329 predicate places. [2025-04-13 20:34:32,823 INFO L485 AbstractCegarLoop]: Abstraction has has 1351 places, 2830 transitions, 64728 flow [2025-04-13 20:34:32,823 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 20:34:32,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:34:32,823 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:34:32,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2025-04-13 20:34:33,024 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:34:33,024 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 20:34:33,025 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:34:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1415556070, now seen corresponding path program 64 times [2025-04-13 20:34:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:34:33,025 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379898485] [2025-04-13 20:34:33,025 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:34:33,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:34:33,030 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-13 20:34:33,031 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 15 of 23 statements. [2025-04-13 20:34:33,031 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-13 20:34:33,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:34:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:34:33,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:34:33,061 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379898485] [2025-04-13 20:34:33,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379898485] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:34:33,061 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928267945] [2025-04-13 20:34:33,061 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:34:33,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:34:33,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:34:33,063 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:34:33,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2025-04-13 20:34:33,133 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-13 20:34:33,139 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 15 of 23 statements. [2025-04-13 20:34:33,139 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-04-13 20:34:33,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:34:33,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-13 20:34:33,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:34:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:34:33,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:34:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:34:33,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928267945] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:34:33,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:34:33,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-04-13 20:34:33,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705758679] [2025-04-13 20:34:33,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:34:33,209 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-13 20:34:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:34:33,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-13 20:34:33,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-04-13 20:34:33,210 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 23 [2025-04-13 20:34:33,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1351 places, 2830 transitions, 64728 flow. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 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 20:34:33,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:34:33,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 23 [2025-04-13 20:34:33,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:34:47,240 INFO L116 PetriNetUnfolderBase]: 9432/16457 cut-off events. [2025-04-13 20:34:47,240 INFO L117 PetriNetUnfolderBase]: For 3476481/3476481 co-relation queries the response was YES. [2025-04-13 20:34:47,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277834 conditions, 16457 events. 9432/16457 cut-off events. For 3476481/3476481 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 133081 event pairs, 889 based on Foata normal form. 9/16304 useless extension candidates. Maximal degree in co-relation 277419. Up to 6061 conditions per place. [2025-04-13 20:34:47,596 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 2497 selfloop transitions, 637 changer transitions 10/3144 dead transitions. [2025-04-13 20:34:47,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1358 places, 3144 transitions, 86108 flow [2025-04-13 20:34:47,596 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-13 20:34:47,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-13 20:34:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2025-04-13 20:34:47,597 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41739130434782606 [2025-04-13 20:34:47,597 INFO L175 Difference]: Start difference. First operand has 1351 places, 2830 transitions, 64728 flow. Second operand 10 states and 96 transitions. [2025-04-13 20:34:47,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1358 places, 3144 transitions, 86108 flow Received shutdown request... [2025-04-13 20:35:21,467 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 20:35:21,467 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 20:35:21,498 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 20:35:21,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2025-04-13 20:35:21,698 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2025-04-13 20:35:21,698 WARN L610 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2025-04-13 20:35:21,700 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 20:35:21,700 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 20:35:21,700 INFO L422 BasicCegarLoop]: Path program histogram: [64, 6, 6, 2, 2, 1, 1, 1] [2025-04-13 20:35:21,703 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 20:35:21,703 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 20:35:21,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 08:35:21 BasicIcfg [2025-04-13 20:35:21,705 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 20:35:21,706 INFO L158 Benchmark]: Toolchain (without parser) took 797930.08ms. Allocated memory was 142.6MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 101.4MB in the beginning and 1.1GB in the end (delta: -958.4MB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2025-04-13 20:35:21,706 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 155.2MB. Free memory is still 84.5MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:35:21,706 INFO L158 Benchmark]: CACSL2BoogieTranslator took 257.61ms. Allocated memory is still 142.6MB. Free memory was 101.4MB in the beginning and 86.3MB in the end (delta: 15.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-13 20:35:21,706 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.24ms. Allocated memory is still 142.6MB. Free memory was 86.3MB in the beginning and 84.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:35:21,706 INFO L158 Benchmark]: Boogie Preprocessor took 46.96ms. Allocated memory is still 142.6MB. Free memory was 84.3MB in the beginning and 82.2MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:35:21,706 INFO L158 Benchmark]: RCFGBuilder took 473.26ms. Allocated memory is still 142.6MB. Free memory was 82.2MB in the beginning and 36.1MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. [2025-04-13 20:35:21,706 INFO L158 Benchmark]: TraceAbstraction took 797106.32ms. Allocated memory was 142.6MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 35.5MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2025-04-13 20:35:21,707 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 155.2MB. Free memory is still 84.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 257.61ms. Allocated memory is still 142.6MB. Free memory was 101.4MB in the beginning and 86.3MB in the end (delta: 15.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.24ms. Allocated memory is still 142.6MB. Free memory was 86.3MB in the beginning and 84.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 46.96ms. Allocated memory is still 142.6MB. Free memory was 84.3MB in the beginning and 82.2MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 473.26ms. Allocated memory is still 142.6MB. Free memory was 82.2MB in the beginning and 36.1MB in the end (delta: 46.1MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. * TraceAbstraction took 797106.32ms. Allocated memory was 142.6MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 35.5MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 29 locations, 37 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: 797.0s, OverallIterations: 83, TraceHistogramMax: 3, PathProgramHistogramMax: 64, EmptinessCheckTime: 0.0s, AutomataDifference: 736.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 mSolverCounterUnknown, 5996 SdHoareTripleChecker+Valid, 72.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5996 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 67.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2628 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 70816 IncrementalHoareTripleChecker+Invalid, 73456 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2628 mSolverCounterUnsat, 0 mSDtfsCounter, 70816 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4705 GetRequests, 1840 SyntacticMatches, 31 SemanticMatches, 2834 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32487 ImplicationChecksByTransitivity, 36.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64728occurred in iteration=82, InterpolantAutomatonStates: 1988, 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: 0.6s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 40.4s InterpolantComputationTime, 3143 NumberOfCodeBlocks, 3113 NumberOfCodeBlocksAsserted, 282 NumberOfCheckSat, 4359 ConstructedInterpolants, 112 QuantifiedInterpolants, 46243 SizeOfPredicates, 736 NumberOfNonLiveVariables, 12342 ConjunctsInSsa, 2236 ConjunctsInUnsatCore, 224 InterpolantComputations, 15 PerfectInterpolantSequences, 465/1214 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