/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-more-queue-add-2-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:42:51,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:42:51,097 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 20:42:51,104 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:42:51,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:42:51,130 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:42:51,130 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:42:51,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:42:51,133 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:42:51,134 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:42:51,134 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:42:51,134 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:42:51,134 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:42:51,134 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:42:51,135 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:42:51,135 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:42:51,135 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:42:51,135 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:42:51,135 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:42:51,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:42:51,135 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:42:51,135 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:42:51,135 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:42:51,136 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:42:51,136 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:42:51,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:42:51,137 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:42:51,137 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:42:51,137 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 20:42:51,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:42:51,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:42:51,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:42:51,343 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:42:51,343 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:42:51,345 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2025-04-13 20:42:52,584 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/714d5f03e/4adf18229eed4c939ee93e44d2b0c2f7/FLAGccb34cf71 [2025-04-13 20:42:52,763 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:42:52,764 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2025-04-13 20:42:52,772 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/714d5f03e/4adf18229eed4c939ee93e44d2b0c2f7/FLAGccb34cf71 [2025-04-13 20:42:53,784 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/714d5f03e/4adf18229eed4c939ee93e44d2b0c2f7 [2025-04-13 20:42:53,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:42:53,787 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:42:53,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:42:53,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:42:53,792 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:42:53,793 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:42:53" (1/1) ... [2025-04-13 20:42:53,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6ae971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:53, skipping insertion in model container [2025-04-13 20:42:53,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:42:53" (1/1) ... [2025-04-13 20:42:53,805 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:42:53,952 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-more-queue-add-2-nl.wvr.c[2896,2909] [2025-04-13 20:42:53,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:42:53,978 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:42:54,009 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-more-queue-add-2-nl.wvr.c[2896,2909] [2025-04-13 20:42:54,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:42:54,037 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:42:54,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54 WrapperNode [2025-04-13 20:42:54,037 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:42:54,038 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:42:54,038 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:42:54,039 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:42:54,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,074 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 150 [2025-04-13 20:42:54,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:42:54,075 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:42:54,075 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:42:54,075 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:42:54,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,084 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,100 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-04-13 20:42:54,100 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,100 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,106 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:42:54,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:42:54,125 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:42:54,125 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:42:54,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (1/1) ... [2025-04-13 20:42:54,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:42:54,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:42:54,154 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 20:42:54,157 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 20:42:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:42:54,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:42:54,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:42:54,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:42:54,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 20:42:54,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 20:42:54,175 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 20:42:54,251 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:42:54,252 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:42:54,433 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:42:54,434 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:42:54,434 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:42:54,643 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 20:42:54,663 INFO L313 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-13 20:42:54,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:42:54 BoogieIcfgContainer [2025-04-13 20:42:54,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:42:54,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:42:54,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:42:54,673 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:42:54,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:42:53" (1/3) ... [2025-04-13 20:42:54,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac8239e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:42:54, skipping insertion in model container [2025-04-13 20:42:54,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:42:54" (2/3) ... [2025-04-13 20:42:54,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac8239e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:42:54, skipping insertion in model container [2025-04-13 20:42:54,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:42:54" (3/3) ... [2025-04-13 20:42:54,675 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2025-04-13 20:42:54,685 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:42:54,687 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-queue-add-2-nl.wvr.c that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 20:42:54,687 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:42:54,728 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 20:42:54,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 64 flow [2025-04-13 20:42:54,777 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 20:42:54,778 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:42:54,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 5/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2025-04-13 20:42:54,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 64 flow [2025-04-13 20:42:54,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 22 transitions, 56 flow [2025-04-13 20:42:54,792 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:42:54,800 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;@6470f204, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:42:54,801 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 20:42:54,807 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:42:54,807 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 20:42:54,807 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:42:54,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:54,808 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:54,808 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 20:42:54,811 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash -735769875, now seen corresponding path program 1 times [2025-04-13 20:42:54,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:54,818 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554996988] [2025-04-13 20:42:54,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:54,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:54,876 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 20:42:54,905 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:42:54,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:54,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:54,970 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 20:42:54,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:54,971 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554996988] [2025-04-13 20:42:54,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554996988] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:54,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:54,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 20:42:54,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699928750] [2025-04-13 20:42:54,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:54,979 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-04-13 20:42:54,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:54,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-04-13 20:42:54,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-04-13 20:42:54,998 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:55,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 56 flow. Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:55,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:55,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:55,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:55,073 INFO L116 PetriNetUnfolderBase]: 100/168 cut-off events. [2025-04-13 20:42:55,073 INFO L117 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-04-13 20:42:55,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 168 events. 100/168 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 412 event pairs, 66 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 320. Up to 169 conditions per place. [2025-04-13 20:42:55,077 INFO L140 encePairwiseOnDemand]: 24/25 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2025-04-13 20:42:55,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 96 flow [2025-04-13 20:42:55,078 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-04-13 20:42:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-04-13 20:42:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 26 transitions. [2025-04-13 20:42:55,087 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.52 [2025-04-13 20:42:55,088 INFO L175 Difference]: Start difference. First operand has 24 places, 22 transitions, 56 flow. Second operand 2 states and 26 transitions. [2025-04-13 20:42:55,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 96 flow [2025-04-13 20:42:55,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 20:42:55,094 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 46 flow [2025-04-13 20:42:55,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2025-04-13 20:42:55,099 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, -3 predicate places. [2025-04-13 20:42:55,099 INFO L485 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 46 flow [2025-04-13 20:42:55,099 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:55,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:55,100 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:55,100 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:42:55,100 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 20:42:55,100 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:55,100 INFO L85 PathProgramCache]: Analyzing trace with hash 194766151, now seen corresponding path program 1 times [2025-04-13 20:42:55,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:55,102 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207310385] [2025-04-13 20:42:55,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:55,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:55,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-13 20:42:55,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 20:42:55,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:55,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:55,298 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 20:42:55,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:55,298 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207310385] [2025-04-13 20:42:55,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207310385] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:55,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:55,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:42:55,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641269064] [2025-04-13 20:42:55,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:55,299 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:42:55,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:55,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:42:55,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:42:55,300 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:55,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:55,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:55,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:55,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:55,385 INFO L116 PetriNetUnfolderBase]: 113/201 cut-off events. [2025-04-13 20:42:55,385 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:42:55,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 201 events. 113/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 562 event pairs, 79 based on Foata normal form. 18/178 useless extension candidates. Maximal degree in co-relation 413. Up to 169 conditions per place. [2025-04-13 20:42:55,389 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 20 selfloop transitions, 2 changer transitions 8/30 dead transitions. [2025-04-13 20:42:55,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 126 flow [2025-04-13 20:42:55,390 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:42:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:42:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2025-04-13 20:42:55,391 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41 [2025-04-13 20:42:55,391 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 46 flow. Second operand 4 states and 41 transitions. [2025-04-13 20:42:55,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 126 flow [2025-04-13 20:42:55,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-13 20:42:55,393 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 64 flow [2025-04-13 20:42:55,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2025-04-13 20:42:55,393 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2025-04-13 20:42:55,393 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 64 flow [2025-04-13 20:42:55,393 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 20:42:55,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:55,394 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:55,394 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:42:55,394 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 20:42:55,394 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:55,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1922284591, now seen corresponding path program 1 times [2025-04-13 20:42:55,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:55,394 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095878530] [2025-04-13 20:42:55,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:55,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:55,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:42:55,445 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:42:55,445 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:55,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:55,840 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 20:42:55,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:55,841 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095878530] [2025-04-13 20:42:55,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095878530] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:55,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:55,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-04-13 20:42:55,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864324255] [2025-04-13 20:42:55,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:55,841 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-13 20:42:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:55,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-13 20:42:55,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:42:55,842 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:55,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:55,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:55,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:55,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:56,057 INFO L116 PetriNetUnfolderBase]: 203/337 cut-off events. [2025-04-13 20:42:56,057 INFO L117 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-04-13 20:42:56,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 337 events. 203/337 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1150 event pairs, 20 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 764. Up to 205 conditions per place. [2025-04-13 20:42:56,059 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 43 selfloop transitions, 18 changer transitions 4/65 dead transitions. [2025-04-13 20:42:56,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 65 transitions, 303 flow [2025-04-13 20:42:56,061 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 20:42:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 20:42:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2025-04-13 20:42:56,062 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3688888888888889 [2025-04-13 20:42:56,062 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 64 flow. Second operand 9 states and 83 transitions. [2025-04-13 20:42:56,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 65 transitions, 303 flow [2025-04-13 20:42:56,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 65 transitions, 299 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-13 20:42:56,064 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 161 flow [2025-04-13 20:42:56,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=161, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2025-04-13 20:42:56,064 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2025-04-13 20:42:56,064 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 161 flow [2025-04-13 20:42:56,064 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:56,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:56,064 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:56,065 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:42:56,065 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 20:42:56,065 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:56,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1225498075, now seen corresponding path program 2 times [2025-04-13 20:42:56,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:56,065 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181793032] [2025-04-13 20:42:56,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:42:56,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:56,075 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:42:56,080 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 15 of 16 statements. [2025-04-13 20:42:56,081 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:42:56,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:56,113 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 20:42:56,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:56,114 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181793032] [2025-04-13 20:42:56,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181793032] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:56,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:56,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 20:42:56,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127364142] [2025-04-13 20:42:56,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:56,114 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:42:56,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:56,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:42:56,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:42:56,115 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:56,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:56,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:56,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:56,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:56,166 INFO L116 PetriNetUnfolderBase]: 156/272 cut-off events. [2025-04-13 20:42:56,166 INFO L117 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2025-04-13 20:42:56,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 272 events. 156/272 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 895 event pairs, 29 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 818. Up to 237 conditions per place. [2025-04-13 20:42:56,168 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 41 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2025-04-13 20:42:56,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 271 flow [2025-04-13 20:42:56,169 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:42:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:42:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2025-04-13 20:42:56,170 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2025-04-13 20:42:56,170 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 161 flow. Second operand 3 states and 34 transitions. [2025-04-13 20:42:56,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 271 flow [2025-04-13 20:42:56,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 267 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 20:42:56,172 INFO L231 Difference]: Finished difference. Result has 36 places, 39 transitions, 176 flow [2025-04-13 20:42:56,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=36, PETRI_TRANSITIONS=39} [2025-04-13 20:42:56,172 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2025-04-13 20:42:56,172 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 39 transitions, 176 flow [2025-04-13 20:42:56,173 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:56,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:56,173 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:56,173 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:42:56,173 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 20:42:56,173 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:56,173 INFO L85 PathProgramCache]: Analyzing trace with hash -521497821, now seen corresponding path program 3 times [2025-04-13 20:42:56,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:56,173 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902167788] [2025-04-13 20:42:56,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:42:56,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:56,183 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:42:56,193 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 15 of 16 statements. [2025-04-13 20:42:56,193 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:42:56,193 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:56,462 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 20:42:56,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:56,462 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902167788] [2025-04-13 20:42:56,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902167788] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:56,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:56,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-04-13 20:42:56,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353385810] [2025-04-13 20:42:56,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:56,463 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-13 20:42:56,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:56,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-13 20:42:56,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:42:56,464 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:56,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 39 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:56,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:56,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:56,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:56,627 INFO L116 PetriNetUnfolderBase]: 155/275 cut-off events. [2025-04-13 20:42:56,627 INFO L117 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2025-04-13 20:42:56,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 275 events. 155/275 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 898 event pairs, 28 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 894. Up to 187 conditions per place. [2025-04-13 20:42:56,631 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 38 selfloop transitions, 19 changer transitions 4/61 dead transitions. [2025-04-13 20:42:56,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 391 flow [2025-04-13 20:42:56,632 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:42:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:42:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2025-04-13 20:42:56,633 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36 [2025-04-13 20:42:56,633 INFO L175 Difference]: Start difference. First operand has 36 places, 39 transitions, 176 flow. Second operand 8 states and 72 transitions. [2025-04-13 20:42:56,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 391 flow [2025-04-13 20:42:56,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 61 transitions, 363 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-04-13 20:42:56,635 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 246 flow [2025-04-13 20:42:56,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=246, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2025-04-13 20:42:56,638 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 20 predicate places. [2025-04-13 20:42:56,639 INFO L485 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 246 flow [2025-04-13 20:42:56,639 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:56,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:56,639 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:56,639 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 20:42:56,639 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 20:42:56,639 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:56,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1785100701, now seen corresponding path program 4 times [2025-04-13 20:42:56,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:56,639 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810131518] [2025-04-13 20:42:56,639 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:42:56,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:56,646 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:42:56,657 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 20:42:56,657 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:42:56,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:56,856 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 20:42:56,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:56,856 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810131518] [2025-04-13 20:42:56,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810131518] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:56,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:56,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-04-13 20:42:56,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951220994] [2025-04-13 20:42:56,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:56,857 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-13 20:42:56,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:56,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-13 20:42:56,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:42:56,857 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:56,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 246 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:56,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:56,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:56,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:56,966 INFO L116 PetriNetUnfolderBase]: 153/275 cut-off events. [2025-04-13 20:42:56,967 INFO L117 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2025-04-13 20:42:56,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 275 events. 153/275 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 930 event pairs, 22 based on Foata normal form. 1/241 useless extension candidates. Maximal degree in co-relation 936. Up to 196 conditions per place. [2025-04-13 20:42:56,968 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 36 selfloop transitions, 17 changer transitions 6/59 dead transitions. [2025-04-13 20:42:56,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 410 flow [2025-04-13 20:42:56,969 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:42:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:42:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 68 transitions. [2025-04-13 20:42:56,969 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34 [2025-04-13 20:42:56,969 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 246 flow. Second operand 8 states and 68 transitions. [2025-04-13 20:42:56,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 410 flow [2025-04-13 20:42:56,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 390 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-04-13 20:42:56,973 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 258 flow [2025-04-13 20:42:56,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=258, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2025-04-13 20:42:56,974 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 25 predicate places. [2025-04-13 20:42:56,974 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 258 flow [2025-04-13 20:42:56,974 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:56,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:56,974 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:56,974 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 20:42:56,974 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 20:42:56,974 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash 619200647, now seen corresponding path program 5 times [2025-04-13 20:42:56,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:56,975 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335646549] [2025-04-13 20:42:56,975 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:42:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:56,980 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-13 20:42:56,987 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:42:56,987 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:42:56,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:57,223 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 20:42:57,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:57,223 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335646549] [2025-04-13 20:42:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335646549] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:57,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-04-13 20:42:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040136218] [2025-04-13 20:42:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:57,224 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-13 20:42:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:57,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-13 20:42:57,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:42:57,224 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:57,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 258 flow. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:57,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:57,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:57,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:57,345 INFO L116 PetriNetUnfolderBase]: 151/273 cut-off events. [2025-04-13 20:42:57,346 INFO L117 PetriNetUnfolderBase]: For 349/349 co-relation queries the response was YES. [2025-04-13 20:42:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 273 events. 151/273 cut-off events. For 349/349 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 901 event pairs, 33 based on Foata normal form. 1/241 useless extension candidates. Maximal degree in co-relation 944. Up to 194 conditions per place. [2025-04-13 20:42:57,347 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 36 selfloop transitions, 16 changer transitions 6/58 dead transitions. [2025-04-13 20:42:57,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 423 flow [2025-04-13 20:42:57,348 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:42:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:42:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2025-04-13 20:42:57,349 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.345 [2025-04-13 20:42:57,349 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 258 flow. Second operand 8 states and 69 transitions. [2025-04-13 20:42:57,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 423 flow [2025-04-13 20:42:57,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 383 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-04-13 20:42:57,353 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 250 flow [2025-04-13 20:42:57,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2025-04-13 20:42:57,354 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 25 predicate places. [2025-04-13 20:42:57,354 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 250 flow [2025-04-13 20:42:57,354 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:57,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:57,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:57,354 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-13 20:42:57,354 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 20:42:57,355 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1956139093, now seen corresponding path program 1 times [2025-04-13 20:42:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:57,355 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145544538] [2025-04-13 20:42:57,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:57,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:42:57,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:42:57,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:57,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:57,443 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 20:42:57,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:57,443 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145544538] [2025-04-13 20:42:57,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145544538] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:42:57,443 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172902986] [2025-04-13 20:42:57,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:57,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:42:57,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:42:57,449 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 20:42:57,450 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 20:42:57,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:42:57,508 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:42:57,508 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:57,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:57,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-13 20:42:57,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:42:57,586 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 20:42:57,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:42:57,664 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 20:42:57,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172902986] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:42:57,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:42:57,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-04-13 20:42:57,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884040831] [2025-04-13 20:42:57,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:42:57,664 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-13 20:42:57,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:57,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-13 20:42:57,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-04-13 20:42:57,665 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:57,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 250 flow. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:57,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:57,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:57,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:57,819 INFO L116 PetriNetUnfolderBase]: 261/479 cut-off events. [2025-04-13 20:42:57,819 INFO L117 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2025-04-13 20:42:57,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 479 events. 261/479 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1912 event pairs, 97 based on Foata normal form. 20/441 useless extension candidates. Maximal degree in co-relation 1675. Up to 265 conditions per place. [2025-04-13 20:42:57,823 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 66 selfloop transitions, 5 changer transitions 12/83 dead transitions. [2025-04-13 20:42:57,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 675 flow [2025-04-13 20:42:57,823 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:42:57,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:42:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2025-04-13 20:42:57,824 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-04-13 20:42:57,824 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 250 flow. Second operand 6 states and 60 transitions. [2025-04-13 20:42:57,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 675 flow [2025-04-13 20:42:57,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 83 transitions, 601 flow, removed 4 selfloop flow, removed 7 redundant places. [2025-04-13 20:42:57,829 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 258 flow [2025-04-13 20:42:57,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2025-04-13 20:42:57,831 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 24 predicate places. [2025-04-13 20:42:57,831 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 258 flow [2025-04-13 20:42:57,831 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:57,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:57,831 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 20:42:57,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-13 20:42:58,032 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:42:58,032 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 20:42:58,032 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:58,032 INFO L85 PathProgramCache]: Analyzing trace with hash 568476663, now seen corresponding path program 1 times [2025-04-13 20:42:58,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:58,033 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954336884] [2025-04-13 20:42:58,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:58,040 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:42:58,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:42:58,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:58,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:58,148 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 20:42:58,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:58,148 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954336884] [2025-04-13 20:42:58,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954336884] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:42:58,148 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906961984] [2025-04-13 20:42:58,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:58,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:42:58,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:42:58,152 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 20:42:58,153 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 20:42:58,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:42:58,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:42:58,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:58,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:58,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-13 20:42:58,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:42:58,272 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 20:42:58,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:42:58,350 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 20:42:58,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906961984] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:42:58,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:42:58,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-04-13 20:42:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296149746] [2025-04-13 20:42:58,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:42:58,351 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:42:58,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:58,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:42:58,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:42:58,351 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:58,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 258 flow. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:58,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:58,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:58,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:58,528 INFO L116 PetriNetUnfolderBase]: 196/368 cut-off events. [2025-04-13 20:42:58,528 INFO L117 PetriNetUnfolderBase]: For 446/446 co-relation queries the response was YES. [2025-04-13 20:42:58,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 368 events. 196/368 cut-off events. For 446/446 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1413 event pairs, 37 based on Foata normal form. 5/342 useless extension candidates. Maximal degree in co-relation 1256. Up to 230 conditions per place. [2025-04-13 20:42:58,530 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 42 selfloop transitions, 5 changer transitions 30/77 dead transitions. [2025-04-13 20:42:58,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 577 flow [2025-04-13 20:42:58,531 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:42:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:42:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 66 transitions. [2025-04-13 20:42:58,531 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33 [2025-04-13 20:42:58,531 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 258 flow. Second operand 8 states and 66 transitions. [2025-04-13 20:42:58,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 577 flow [2025-04-13 20:42:58,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 77 transitions, 562 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-04-13 20:42:58,534 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 240 flow [2025-04-13 20:42:58,534 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=240, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2025-04-13 20:42:58,534 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 30 predicate places. [2025-04-13 20:42:58,534 INFO L485 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 240 flow [2025-04-13 20:42:58,534 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:42:58,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:58,534 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 20:42:58,540 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 20:42:58,739 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 20:42:58,739 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 20:42:58,740 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:58,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1190403795, now seen corresponding path program 2 times [2025-04-13 20:42:58,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:58,740 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486385228] [2025-04-13 20:42:58,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:42:58,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:58,747 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-13 20:42:58,754 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-13 20:42:58,755 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:42:58,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:42:58,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:58,799 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486385228] [2025-04-13 20:42:58,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486385228] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:58,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:58,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:42:58,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540769436] [2025-04-13 20:42:58,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:58,800 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:42:58,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:58,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:42:58,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:42:58,800 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:58,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 240 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 20:42:58,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:58,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:58,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:58,884 INFO L116 PetriNetUnfolderBase]: 244/439 cut-off events. [2025-04-13 20:42:58,885 INFO L117 PetriNetUnfolderBase]: For 522/522 co-relation queries the response was YES. [2025-04-13 20:42:58,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1462 conditions, 439 events. 244/439 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1676 event pairs, 49 based on Foata normal form. 11/385 useless extension candidates. Maximal degree in co-relation 1446. Up to 151 conditions per place. [2025-04-13 20:42:58,887 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 54 selfloop transitions, 7 changer transitions 15/76 dead transitions. [2025-04-13 20:42:58,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 539 flow [2025-04-13 20:42:58,887 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:42:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:42:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-04-13 20:42:58,887 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.59 [2025-04-13 20:42:58,887 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 240 flow. Second operand 4 states and 59 transitions. [2025-04-13 20:42:58,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 539 flow [2025-04-13 20:42:58,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 76 transitions, 517 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-04-13 20:42:58,889 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 196 flow [2025-04-13 20:42:58,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2025-04-13 20:42:58,890 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 23 predicate places. [2025-04-13 20:42:58,890 INFO L485 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 196 flow [2025-04-13 20:42:58,890 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 20:42:58,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:58,890 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:58,890 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-04-13 20:42:58,891 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 20:42:58,891 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash 888671465, now seen corresponding path program 2 times [2025-04-13 20:42:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:58,891 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194657488] [2025-04-13 20:42:58,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:42:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:58,896 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-13 20:42:58,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 17 of 19 statements. [2025-04-13 20:42:58,908 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:42:58,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:42:59,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:59,001 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194657488] [2025-04-13 20:42:59,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194657488] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:42:59,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:42:59,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:42:59,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076418537] [2025-04-13 20:42:59,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:42:59,002 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:42:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:42:59,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:42:59,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-04-13 20:42:59,002 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:42:59,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 196 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 20:42:59,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:42:59,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:42:59,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:42:59,081 INFO L116 PetriNetUnfolderBase]: 262/461 cut-off events. [2025-04-13 20:42:59,081 INFO L117 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2025-04-13 20:42:59,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 461 events. 262/461 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1610 event pairs, 43 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 1559. Up to 169 conditions per place. [2025-04-13 20:42:59,084 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 55 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2025-04-13 20:42:59,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 63 transitions, 466 flow [2025-04-13 20:42:59,084 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:42:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:42:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2025-04-13 20:42:59,085 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36 [2025-04-13 20:42:59,085 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 196 flow. Second operand 6 states and 54 transitions. [2025-04-13 20:42:59,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 63 transitions, 466 flow [2025-04-13 20:42:59,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 63 transitions, 427 flow, removed 12 selfloop flow, removed 4 redundant places. [2025-04-13 20:42:59,087 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 214 flow [2025-04-13 20:42:59,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2025-04-13 20:42:59,088 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 20 predicate places. [2025-04-13 20:42:59,088 INFO L485 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 214 flow [2025-04-13 20:42:59,088 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 20:42:59,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:42:59,088 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:42:59,088 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-04-13 20:42:59,088 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 20:42:59,089 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:42:59,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1003841951, now seen corresponding path program 1 times [2025-04-13 20:42:59,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:42:59,089 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656712500] [2025-04-13 20:42:59,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:59,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:42:59,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:42:59,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:42:59,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:59,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:59,705 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 20:42:59,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:42:59,705 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656712500] [2025-04-13 20:42:59,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656712500] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:42:59,705 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312708081] [2025-04-13 20:42:59,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:42:59,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:42:59,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:42:59,708 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 20:42:59,710 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 20:42:59,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:42:59,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:42:59,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:42:59,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:42:59,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 20:42:59,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:00,315 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 20:43:00,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:00,706 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:00,706 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 40 treesize of output 32 [2025-04-13 20:43:01,088 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 20:43:01,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312708081] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:01,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:01,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2025-04-13 20:43:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223453487] [2025-04-13 20:43:01,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:01,089 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:43:01,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:01,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:43:01,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:43:01,090 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:01,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 214 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:01,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:01,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:01,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:04,677 INFO L116 PetriNetUnfolderBase]: 496/890 cut-off events. [2025-04-13 20:43:04,677 INFO L117 PetriNetUnfolderBase]: For 1399/1399 co-relation queries the response was YES. [2025-04-13 20:43:04,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3243 conditions, 890 events. 496/890 cut-off events. For 1399/1399 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4022 event pairs, 31 based on Foata normal form. 2/832 useless extension candidates. Maximal degree in co-relation 3229. Up to 499 conditions per place. [2025-04-13 20:43:04,684 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 121 selfloop transitions, 79 changer transitions 8/208 dead transitions. [2025-04-13 20:43:04,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 208 transitions, 1457 flow [2025-04-13 20:43:04,685 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 20:43:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 20:43:04,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 245 transitions. [2025-04-13 20:43:04,686 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28823529411764703 [2025-04-13 20:43:04,686 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 214 flow. Second operand 34 states and 245 transitions. [2025-04-13 20:43:04,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 208 transitions, 1457 flow [2025-04-13 20:43:04,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 208 transitions, 1433 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-04-13 20:43:04,692 INFO L231 Difference]: Finished difference. Result has 87 places, 115 transitions, 1021 flow [2025-04-13 20:43:04,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1021, PETRI_PLACES=87, PETRI_TRANSITIONS=115} [2025-04-13 20:43:04,692 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 63 predicate places. [2025-04-13 20:43:04,692 INFO L485 AbstractCegarLoop]: Abstraction has has 87 places, 115 transitions, 1021 flow [2025-04-13 20:43:04,693 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:04,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:04,693 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:04,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 20:43:04,897 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:04,897 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 20:43:04,897 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:04,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1885562463, now seen corresponding path program 2 times [2025-04-13 20:43:04,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:04,897 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176265817] [2025-04-13 20:43:04,898 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:43:04,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:04,902 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:04,924 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:04,924 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:04,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:05,491 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 20:43:05,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:05,491 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176265817] [2025-04-13 20:43:05,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176265817] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:05,491 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076707606] [2025-04-13 20:43:05,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:43:05,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:05,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:05,493 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 20:43:05,494 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 20:43:05,531 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:05,562 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:05,562 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:05,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:05,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-13 20:43:05,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:05,977 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-13 20:43:05,977 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 23 treesize of output 10 [2025-04-13 20:43:06,062 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 20:43:06,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:06,438 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:06,438 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 40 treesize of output 32 [2025-04-13 20:43:06,762 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 20:43:06,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076707606] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:06,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:06,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2025-04-13 20:43:06,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461576087] [2025-04-13 20:43:06,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:06,763 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-04-13 20:43:06,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:06,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-04-13 20:43:06,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2025-04-13 20:43:06,764 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:06,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 115 transitions, 1021 flow. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:06,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:06,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:06,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:08,757 INFO L116 PetriNetUnfolderBase]: 551/998 cut-off events. [2025-04-13 20:43:08,758 INFO L117 PetriNetUnfolderBase]: For 3179/3179 co-relation queries the response was YES. [2025-04-13 20:43:08,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4757 conditions, 998 events. 551/998 cut-off events. For 3179/3179 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4776 event pairs, 44 based on Foata normal form. 2/994 useless extension candidates. Maximal degree in co-relation 4730. Up to 703 conditions per place. [2025-04-13 20:43:08,764 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 139 selfloop transitions, 73 changer transitions 8/220 dead transitions. [2025-04-13 20:43:08,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 220 transitions, 2064 flow [2025-04-13 20:43:08,764 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-13 20:43:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-13 20:43:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 203 transitions. [2025-04-13 20:43:08,765 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28 [2025-04-13 20:43:08,765 INFO L175 Difference]: Start difference. First operand has 87 places, 115 transitions, 1021 flow. Second operand 29 states and 203 transitions. [2025-04-13 20:43:08,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 220 transitions, 2064 flow [2025-04-13 20:43:08,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 220 transitions, 1872 flow, removed 94 selfloop flow, removed 4 redundant places. [2025-04-13 20:43:08,776 INFO L231 Difference]: Finished difference. Result has 122 places, 149 transitions, 1427 flow [2025-04-13 20:43:08,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1427, PETRI_PLACES=122, PETRI_TRANSITIONS=149} [2025-04-13 20:43:08,777 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 98 predicate places. [2025-04-13 20:43:08,777 INFO L485 AbstractCegarLoop]: Abstraction has has 122 places, 149 transitions, 1427 flow [2025-04-13 20:43:08,777 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:08,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:08,777 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:08,783 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 20:43:08,978 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 20:43:08,978 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 20:43:08,979 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1577924375, now seen corresponding path program 3 times [2025-04-13 20:43:08,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:08,979 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702177478] [2025-04-13 20:43:08,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:43:08,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:08,985 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:08,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:08,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:43:08,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:09,492 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 20:43:09,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:09,492 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702177478] [2025-04-13 20:43:09,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702177478] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:09,492 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054815716] [2025-04-13 20:43:09,492 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:43:09,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:09,494 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 20:43:09,497 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 20:43:09,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:09,572 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:09,572 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:43:09,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:09,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:43:09,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:09,953 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 20:43:09,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:10,475 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:10,475 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 32 treesize of output 24 [2025-04-13 20:43:10,816 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 20:43:10,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054815716] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:10,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:10,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:43:10,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454165837] [2025-04-13 20:43:10,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:10,816 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:43:10,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:10,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:43:10,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:43:10,818 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:10,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 149 transitions, 1427 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:10,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:10,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:10,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:12,388 INFO L116 PetriNetUnfolderBase]: 634/1152 cut-off events. [2025-04-13 20:43:12,389 INFO L117 PetriNetUnfolderBase]: For 4594/4594 co-relation queries the response was YES. [2025-04-13 20:43:12,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5869 conditions, 1152 events. 634/1152 cut-off events. For 4594/4594 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5783 event pairs, 38 based on Foata normal form. 4/1150 useless extension candidates. Maximal degree in co-relation 5830. Up to 801 conditions per place. [2025-04-13 20:43:12,396 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 155 selfloop transitions, 99 changer transitions 19/273 dead transitions. [2025-04-13 20:43:12,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 273 transitions, 2679 flow [2025-04-13 20:43:12,396 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-13 20:43:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-13 20:43:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 251 transitions. [2025-04-13 20:43:12,397 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28685714285714287 [2025-04-13 20:43:12,397 INFO L175 Difference]: Start difference. First operand has 122 places, 149 transitions, 1427 flow. Second operand 35 states and 251 transitions. [2025-04-13 20:43:12,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 273 transitions, 2679 flow [2025-04-13 20:43:12,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 273 transitions, 2578 flow, removed 32 selfloop flow, removed 11 redundant places. [2025-04-13 20:43:12,416 INFO L231 Difference]: Finished difference. Result has 152 places, 181 transitions, 1922 flow [2025-04-13 20:43:12,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1344, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1922, PETRI_PLACES=152, PETRI_TRANSITIONS=181} [2025-04-13 20:43:12,416 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 128 predicate places. [2025-04-13 20:43:12,417 INFO L485 AbstractCegarLoop]: Abstraction has has 152 places, 181 transitions, 1922 flow [2025-04-13 20:43:12,417 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:12,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:12,417 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:12,422 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 20:43:12,618 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 20:43:12,618 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 20:43:12,619 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash 260608297, now seen corresponding path program 4 times [2025-04-13 20:43:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:12,619 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578510] [2025-04-13 20:43:12,619 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:43:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:12,626 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:12,638 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 20:43:12,638 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:43:12,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:13,109 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 20:43:13,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:13,109 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578510] [2025-04-13 20:43:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578510] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:13,109 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219877912] [2025-04-13 20:43:13,109 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:43:13,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:13,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:13,111 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 20:43:13,117 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 20:43:13,154 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:13,173 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 20:43:13,173 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:43:13,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:13,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-13 20:43:13,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:13,601 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 20:43:13,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:13,893 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:13,893 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 40 treesize of output 32 [2025-04-13 20:43:14,189 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 20:43:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219877912] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:14,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:14,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2025-04-13 20:43:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168724739] [2025-04-13 20:43:14,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:14,189 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-04-13 20:43:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:14,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-04-13 20:43:14,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2025-04-13 20:43:14,191 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:14,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 181 transitions, 1922 flow. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:14,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:14,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:14,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:15,789 INFO L116 PetriNetUnfolderBase]: 656/1193 cut-off events. [2025-04-13 20:43:15,789 INFO L117 PetriNetUnfolderBase]: For 6515/6515 co-relation queries the response was YES. [2025-04-13 20:43:15,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6704 conditions, 1193 events. 656/1193 cut-off events. For 6515/6515 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6120 event pairs, 35 based on Foata normal form. 2/1189 useless extension candidates. Maximal degree in co-relation 6657. Up to 823 conditions per place. [2025-04-13 20:43:15,798 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 158 selfloop transitions, 114 changer transitions 8/280 dead transitions. [2025-04-13 20:43:15,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 280 transitions, 3015 flow [2025-04-13 20:43:15,799 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 20:43:15,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 20:43:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 232 transitions. [2025-04-13 20:43:15,800 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27294117647058824 [2025-04-13 20:43:15,800 INFO L175 Difference]: Start difference. First operand has 152 places, 181 transitions, 1922 flow. Second operand 34 states and 232 transitions. [2025-04-13 20:43:15,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 280 transitions, 3015 flow [2025-04-13 20:43:15,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 280 transitions, 2869 flow, removed 37 selfloop flow, removed 16 redundant places. [2025-04-13 20:43:15,828 INFO L231 Difference]: Finished difference. Result has 174 places, 203 transitions, 2328 flow [2025-04-13 20:43:15,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2328, PETRI_PLACES=174, PETRI_TRANSITIONS=203} [2025-04-13 20:43:15,828 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 150 predicate places. [2025-04-13 20:43:15,828 INFO L485 AbstractCegarLoop]: Abstraction has has 174 places, 203 transitions, 2328 flow [2025-04-13 20:43:15,828 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:15,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:15,829 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:15,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-13 20:43:16,029 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,SelfDestructingSolverStorable14 [2025-04-13 20:43:16,029 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 20:43:16,030 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1637660135, now seen corresponding path program 5 times [2025-04-13 20:43:16,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:16,030 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948975650] [2025-04-13 20:43:16,030 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:43:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:16,034 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:16,043 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:16,043 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:16,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:16,624 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 20:43:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:16,624 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948975650] [2025-04-13 20:43:16,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948975650] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:16,624 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156754124] [2025-04-13 20:43:16,624 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:43:16,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:16,626 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 20:43:16,627 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 20:43:16,664 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:16,692 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:16,692 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:16,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:16,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:43:16,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:16,963 INFO L325 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2025-04-13 20:43:16,963 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2025-04-13 20:43:17,074 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 20:43:17,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:17,489 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:17,490 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 43 treesize of output 35 [2025-04-13 20:43:17,772 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 20:43:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156754124] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:17,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:17,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:43:17,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74271124] [2025-04-13 20:43:17,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:17,773 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:43:17,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:17,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:43:17,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:43:17,774 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:17,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 203 transitions, 2328 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:17,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:17,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:17,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:21,856 INFO L116 PetriNetUnfolderBase]: 724/1325 cut-off events. [2025-04-13 20:43:21,857 INFO L117 PetriNetUnfolderBase]: For 8965/8965 co-relation queries the response was YES. [2025-04-13 20:43:21,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7934 conditions, 1325 events. 724/1325 cut-off events. For 8965/8965 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7048 event pairs, 42 based on Foata normal form. 4/1323 useless extension candidates. Maximal degree in co-relation 7878. Up to 836 conditions per place. [2025-04-13 20:43:21,867 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 167 selfloop transitions, 170 changer transitions 17/354 dead transitions. [2025-04-13 20:43:21,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 354 transitions, 4031 flow [2025-04-13 20:43:21,867 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-04-13 20:43:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2025-04-13 20:43:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 340 transitions. [2025-04-13 20:43:21,868 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.272 [2025-04-13 20:43:21,868 INFO L175 Difference]: Start difference. First operand has 174 places, 203 transitions, 2328 flow. Second operand 50 states and 340 transitions. [2025-04-13 20:43:21,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 354 transitions, 4031 flow [2025-04-13 20:43:21,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 354 transitions, 3877 flow, removed 25 selfloop flow, removed 19 redundant places. [2025-04-13 20:43:21,902 INFO L231 Difference]: Finished difference. Result has 219 places, 242 transitions, 3147 flow [2025-04-13 20:43:21,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3147, PETRI_PLACES=219, PETRI_TRANSITIONS=242} [2025-04-13 20:43:21,902 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 195 predicate places. [2025-04-13 20:43:21,902 INFO L485 AbstractCegarLoop]: Abstraction has has 219 places, 242 transitions, 3147 flow [2025-04-13 20:43:21,902 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:21,902 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:21,902 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:21,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-13 20:43:22,103 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:22,103 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 20:43:22,103 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash -778190959, now seen corresponding path program 6 times [2025-04-13 20:43:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:22,104 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233790097] [2025-04-13 20:43:22,104 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:43:22,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:22,108 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:22,117 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:22,117 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:43:22,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:22,602 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 20:43:22,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:22,602 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233790097] [2025-04-13 20:43:22,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233790097] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:22,602 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994287009] [2025-04-13 20:43:22,602 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:43:22,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:22,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:22,604 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 20:43:22,605 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 20:43:22,637 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:22,651 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:22,651 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:43:22,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:22,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-04-13 20:43:22,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:23,036 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 20:43:23,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:23,329 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:23,329 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 40 treesize of output 32 [2025-04-13 20:43:23,650 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 20:43:23,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994287009] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:23,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:23,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2025-04-13 20:43:23,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015243316] [2025-04-13 20:43:23,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:23,651 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-04-13 20:43:23,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:23,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-04-13 20:43:23,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2025-04-13 20:43:23,652 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:23,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 242 transitions, 3147 flow. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:23,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:23,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:23,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:25,007 INFO L116 PetriNetUnfolderBase]: 733/1364 cut-off events. [2025-04-13 20:43:25,007 INFO L117 PetriNetUnfolderBase]: For 14357/14357 co-relation queries the response was YES. [2025-04-13 20:43:25,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9217 conditions, 1364 events. 733/1364 cut-off events. For 14357/14357 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 7438 event pairs, 42 based on Foata normal form. 4/1364 useless extension candidates. Maximal degree in co-relation 9145. Up to 920 conditions per place. [2025-04-13 20:43:25,018 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 192 selfloop transitions, 107 changer transitions 25/324 dead transitions. [2025-04-13 20:43:25,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 324 transitions, 4308 flow [2025-04-13 20:43:25,019 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-13 20:43:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-13 20:43:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 220 transitions. [2025-04-13 20:43:25,020 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2838709677419355 [2025-04-13 20:43:25,020 INFO L175 Difference]: Start difference. First operand has 219 places, 242 transitions, 3147 flow. Second operand 31 states and 220 transitions. [2025-04-13 20:43:25,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 324 transitions, 4308 flow [2025-04-13 20:43:25,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 324 transitions, 4006 flow, removed 102 selfloop flow, removed 23 redundant places. [2025-04-13 20:43:25,076 INFO L231 Difference]: Finished difference. Result has 231 places, 238 transitions, 3063 flow [2025-04-13 20:43:25,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3063, PETRI_PLACES=231, PETRI_TRANSITIONS=238} [2025-04-13 20:43:25,076 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 207 predicate places. [2025-04-13 20:43:25,076 INFO L485 AbstractCegarLoop]: Abstraction has has 231 places, 238 transitions, 3063 flow [2025-04-13 20:43:25,077 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:25,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:25,077 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:25,082 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 20:43:25,277 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-13 20:43:25,277 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 20:43:25,278 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1213875837, now seen corresponding path program 7 times [2025-04-13 20:43:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:25,278 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199315269] [2025-04-13 20:43:25,278 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:43:25,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:25,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:43:25,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:25,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:43:25,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:25,797 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 20:43:25,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:25,798 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199315269] [2025-04-13 20:43:25,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199315269] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:25,798 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082813156] [2025-04-13 20:43:25,798 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:43:25,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:25,800 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 20:43:25,801 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 20:43:25,841 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:43:25,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:25,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:43:25,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:25,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 20:43:25,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:26,323 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 20:43:26,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:26,562 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:26,562 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 42 treesize of output 34 [2025-04-13 20:43:26,859 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 20:43:26,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082813156] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:26,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:26,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2025-04-13 20:43:26,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186484637] [2025-04-13 20:43:26,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:26,860 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-04-13 20:43:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:26,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-04-13 20:43:26,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2025-04-13 20:43:26,861 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:26,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 238 transitions, 3063 flow. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:26,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:26,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:26,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:28,242 INFO L116 PetriNetUnfolderBase]: 798/1476 cut-off events. [2025-04-13 20:43:28,242 INFO L117 PetriNetUnfolderBase]: For 15834/15834 co-relation queries the response was YES. [2025-04-13 20:43:28,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10289 conditions, 1476 events. 798/1476 cut-off events. For 15834/15834 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8169 event pairs, 72 based on Foata normal form. 2/1474 useless extension candidates. Maximal degree in co-relation 10213. Up to 1228 conditions per place. [2025-04-13 20:43:28,254 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 262 selfloop transitions, 81 changer transitions 9/352 dead transitions. [2025-04-13 20:43:28,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 352 transitions, 4917 flow [2025-04-13 20:43:28,254 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-13 20:43:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-13 20:43:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 188 transitions. [2025-04-13 20:43:28,255 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26857142857142857 [2025-04-13 20:43:28,255 INFO L175 Difference]: Start difference. First operand has 231 places, 238 transitions, 3063 flow. Second operand 28 states and 188 transitions. [2025-04-13 20:43:28,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 352 transitions, 4917 flow [2025-04-13 20:43:28,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 352 transitions, 4556 flow, removed 46 selfloop flow, removed 30 redundant places. [2025-04-13 20:43:28,327 INFO L231 Difference]: Finished difference. Result has 234 places, 294 transitions, 3914 flow [2025-04-13 20:43:28,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3914, PETRI_PLACES=234, PETRI_TRANSITIONS=294} [2025-04-13 20:43:28,328 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 210 predicate places. [2025-04-13 20:43:28,328 INFO L485 AbstractCegarLoop]: Abstraction has has 234 places, 294 transitions, 3914 flow [2025-04-13 20:43:28,328 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:28,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:28,328 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:28,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-13 20:43:28,531 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-04-13 20:43:28,531 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 20:43:28,531 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:28,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1024009413, now seen corresponding path program 8 times [2025-04-13 20:43:28,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:28,531 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180609277] [2025-04-13 20:43:28,531 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:43:28,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:28,535 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:28,541 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 21 statements. [2025-04-13 20:43:28,541 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:43:28,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:43:28,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:28,752 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180609277] [2025-04-13 20:43:28,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180609277] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:43:28,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:43:28,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-04-13 20:43:28,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943640869] [2025-04-13 20:43:28,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:43:28,753 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-13 20:43:28,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:28,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-13 20:43:28,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-04-13 20:43:28,753 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:28,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 294 transitions, 3914 flow. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:28,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:28,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:28,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:29,077 INFO L116 PetriNetUnfolderBase]: 835/1539 cut-off events. [2025-04-13 20:43:29,078 INFO L117 PetriNetUnfolderBase]: For 16212/16212 co-relation queries the response was YES. [2025-04-13 20:43:29,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10716 conditions, 1539 events. 835/1539 cut-off events. For 16212/16212 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8577 event pairs, 87 based on Foata normal form. 1/1532 useless extension candidates. Maximal degree in co-relation 10637. Up to 1404 conditions per place. [2025-04-13 20:43:29,091 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 282 selfloop transitions, 44 changer transitions 11/337 dead transitions. [2025-04-13 20:43:29,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 337 transitions, 4982 flow [2025-04-13 20:43:29,092 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-13 20:43:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-13 20:43:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 82 transitions. [2025-04-13 20:43:29,092 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.328 [2025-04-13 20:43:29,092 INFO L175 Difference]: Start difference. First operand has 234 places, 294 transitions, 3914 flow. Second operand 10 states and 82 transitions. [2025-04-13 20:43:29,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 337 transitions, 4982 flow [2025-04-13 20:43:29,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 337 transitions, 4878 flow, removed 40 selfloop flow, removed 10 redundant places. [2025-04-13 20:43:29,175 INFO L231 Difference]: Finished difference. Result has 235 places, 307 transitions, 4113 flow [2025-04-13 20:43:29,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4113, PETRI_PLACES=235, PETRI_TRANSITIONS=307} [2025-04-13 20:43:29,175 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 211 predicate places. [2025-04-13 20:43:29,175 INFO L485 AbstractCegarLoop]: Abstraction has has 235 places, 307 transitions, 4113 flow [2025-04-13 20:43:29,175 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:29,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:29,176 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:29,176 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-04-13 20:43:29,176 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 20:43:29,176 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1664963749, now seen corresponding path program 9 times [2025-04-13 20:43:29,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:29,176 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115918321] [2025-04-13 20:43:29,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:43:29,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:29,180 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:29,190 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:29,190 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:43:29,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:29,626 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 20:43:29,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:29,626 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115918321] [2025-04-13 20:43:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115918321] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:29,626 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202331985] [2025-04-13 20:43:29,626 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:43:29,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:29,628 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 20:43:29,630 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 20:43:29,665 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:29,696 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:29,696 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:43:29,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:29,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-13 20:43:29,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:30,054 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 20:43:30,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:30,467 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:30,467 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 43 treesize of output 35 [2025-04-13 20:43:30,758 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 20:43:30,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202331985] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:30,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:30,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:43:30,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505635263] [2025-04-13 20:43:30,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:30,759 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:43:30,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:30,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:43:30,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:43:30,760 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:30,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 307 transitions, 4113 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:30,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:30,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:30,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:32,271 INFO L116 PetriNetUnfolderBase]: 903/1675 cut-off events. [2025-04-13 20:43:32,271 INFO L117 PetriNetUnfolderBase]: For 20627/20627 co-relation queries the response was YES. [2025-04-13 20:43:32,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12115 conditions, 1675 events. 903/1675 cut-off events. For 20627/20627 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9585 event pairs, 77 based on Foata normal form. 4/1675 useless extension candidates. Maximal degree in co-relation 12035. Up to 1392 conditions per place. [2025-04-13 20:43:32,283 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 289 selfloop transitions, 105 changer transitions 18/412 dead transitions. [2025-04-13 20:43:32,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 412 transitions, 5941 flow [2025-04-13 20:43:32,284 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:43:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:43:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 233 transitions. [2025-04-13 20:43:32,285 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2588888888888889 [2025-04-13 20:43:32,285 INFO L175 Difference]: Start difference. First operand has 235 places, 307 transitions, 4113 flow. Second operand 36 states and 233 transitions. [2025-04-13 20:43:32,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 412 transitions, 5941 flow [2025-04-13 20:43:32,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 412 transitions, 5835 flow, removed 33 selfloop flow, removed 4 redundant places. [2025-04-13 20:43:32,376 INFO L231 Difference]: Finished difference. Result has 276 places, 342 transitions, 4954 flow [2025-04-13 20:43:32,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4954, PETRI_PLACES=276, PETRI_TRANSITIONS=342} [2025-04-13 20:43:32,376 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 252 predicate places. [2025-04-13 20:43:32,376 INFO L485 AbstractCegarLoop]: Abstraction has has 276 places, 342 transitions, 4954 flow [2025-04-13 20:43:32,376 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:32,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:32,376 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:32,382 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 20:43:32,577 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:32,577 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 20:43:32,578 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash -971423493, now seen corresponding path program 10 times [2025-04-13 20:43:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:32,578 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211886818] [2025-04-13 20:43:32,578 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:43:32,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:32,582 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:32,588 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 20:43:32,588 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:43:32,588 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:43:32,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:32,978 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211886818] [2025-04-13 20:43:32,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211886818] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:32,978 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685362396] [2025-04-13 20:43:32,978 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:43:32,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:32,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:32,980 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 20:43:32,982 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 20:43:33,019 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:33,039 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 20:43:33,039 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:43:33,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:33,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-13 20:43:33,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:33,234 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-04-13 20:43:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:43:33,379 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:33,728 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:33,728 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 43 treesize of output 35 [2025-04-13 20:43:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:43:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685362396] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:34,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:34,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 38 [2025-04-13 20:43:34,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439887069] [2025-04-13 20:43:34,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:34,010 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-04-13 20:43:34,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:34,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-04-13 20:43:34,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2025-04-13 20:43:34,011 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:34,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 342 transitions, 4954 flow. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:34,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:34,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:34,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:35,663 INFO L116 PetriNetUnfolderBase]: 951/1761 cut-off events. [2025-04-13 20:43:35,664 INFO L117 PetriNetUnfolderBase]: For 24101/24101 co-relation queries the response was YES. [2025-04-13 20:43:35,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13227 conditions, 1761 events. 951/1761 cut-off events. For 24101/24101 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10230 event pairs, 82 based on Foata normal form. 3/1760 useless extension candidates. Maximal degree in co-relation 13137. Up to 1478 conditions per place. [2025-04-13 20:43:35,678 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 305 selfloop transitions, 98 changer transitions 26/429 dead transitions. [2025-04-13 20:43:35,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 429 transitions, 6558 flow [2025-04-13 20:43:35,679 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-13 20:43:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-13 20:43:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 196 transitions. [2025-04-13 20:43:35,682 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25290322580645164 [2025-04-13 20:43:35,682 INFO L175 Difference]: Start difference. First operand has 276 places, 342 transitions, 4954 flow. Second operand 31 states and 196 transitions. [2025-04-13 20:43:35,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 429 transitions, 6558 flow [2025-04-13 20:43:35,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 429 transitions, 6214 flow, removed 116 selfloop flow, removed 16 redundant places. [2025-04-13 20:43:35,810 INFO L231 Difference]: Finished difference. Result has 297 places, 362 transitions, 5251 flow [2025-04-13 20:43:35,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=4612, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5251, PETRI_PLACES=297, PETRI_TRANSITIONS=362} [2025-04-13 20:43:35,811 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 273 predicate places. [2025-04-13 20:43:35,811 INFO L485 AbstractCegarLoop]: Abstraction has has 297 places, 362 transitions, 5251 flow [2025-04-13 20:43:35,811 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:35,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:35,812 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:35,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-04-13 20:43:36,013 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,SelfDestructingSolverStorable20 [2025-04-13 20:43:36,013 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 20:43:36,013 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1864013509, now seen corresponding path program 11 times [2025-04-13 20:43:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:36,014 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280779964] [2025-04-13 20:43:36,014 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:43:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:36,017 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:36,025 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:36,025 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:36,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:36,516 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 20:43:36,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:36,516 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280779964] [2025-04-13 20:43:36,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280779964] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:36,516 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965749718] [2025-04-13 20:43:36,516 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:43:36,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:36,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:36,518 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 20:43:36,519 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 20:43:36,554 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:36,569 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:36,569 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:36,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:36,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 20:43:36,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:36,790 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-04-13 20:43:36,974 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 20:43:36,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:37,284 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:37,284 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 40 treesize of output 32 [2025-04-13 20:43:37,572 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 20:43:37,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965749718] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:37,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:37,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2025-04-13 20:43:37,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775088927] [2025-04-13 20:43:37,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:37,573 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-04-13 20:43:37,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:37,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-04-13 20:43:37,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2025-04-13 20:43:37,574 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:37,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 362 transitions, 5251 flow. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:37,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:37,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:37,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:38,993 INFO L116 PetriNetUnfolderBase]: 944/1742 cut-off events. [2025-04-13 20:43:38,993 INFO L117 PetriNetUnfolderBase]: For 25890/25890 co-relation queries the response was YES. [2025-04-13 20:43:39,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13458 conditions, 1742 events. 944/1742 cut-off events. For 25890/25890 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10035 event pairs, 86 based on Foata normal form. 2/1740 useless extension candidates. Maximal degree in co-relation 13357. Up to 1578 conditions per place. [2025-04-13 20:43:39,007 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 328 selfloop transitions, 61 changer transitions 31/420 dead transitions. [2025-04-13 20:43:39,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 420 transitions, 6376 flow [2025-04-13 20:43:39,008 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-13 20:43:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-13 20:43:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 192 transitions. [2025-04-13 20:43:39,008 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24774193548387097 [2025-04-13 20:43:39,008 INFO L175 Difference]: Start difference. First operand has 297 places, 362 transitions, 5251 flow. Second operand 31 states and 192 transitions. [2025-04-13 20:43:39,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 420 transitions, 6376 flow [2025-04-13 20:43:39,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 420 transitions, 6123 flow, removed 101 selfloop flow, removed 13 redundant places. [2025-04-13 20:43:39,140 INFO L231 Difference]: Finished difference. Result has 314 places, 359 transitions, 5117 flow [2025-04-13 20:43:39,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5117, PETRI_PLACES=314, PETRI_TRANSITIONS=359} [2025-04-13 20:43:39,140 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 290 predicate places. [2025-04-13 20:43:39,140 INFO L485 AbstractCegarLoop]: Abstraction has has 314 places, 359 transitions, 5117 flow [2025-04-13 20:43:39,140 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:39,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:39,141 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:39,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-13 20:43:39,341 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,SelfDestructingSolverStorable21 [2025-04-13 20:43:39,341 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 20:43:39,341 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:39,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1542878299, now seen corresponding path program 12 times [2025-04-13 20:43:39,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:39,342 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025715866] [2025-04-13 20:43:39,342 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:43:39,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:39,345 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:39,356 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:39,356 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:43:39,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:39,767 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 20:43:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:39,768 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025715866] [2025-04-13 20:43:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025715866] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:39,768 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960506191] [2025-04-13 20:43:39,768 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:43:39,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:39,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:39,769 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 20:43:39,770 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 20:43:39,807 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:39,832 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:39,832 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:43:39,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:39,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:43:39,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:40,007 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2025-04-13 20:43:40,172 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 20:43:40,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:40,618 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:40,618 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 43 treesize of output 35 [2025-04-13 20:43:40,895 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 20:43:40,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960506191] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:40,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:40,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:43:40,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838348983] [2025-04-13 20:43:40,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:40,896 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:43:40,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:40,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:43:40,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:43:40,897 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:40,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 359 transitions, 5117 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:40,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:40,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:40,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:42,350 INFO L116 PetriNetUnfolderBase]: 985/1817 cut-off events. [2025-04-13 20:43:42,351 INFO L117 PetriNetUnfolderBase]: For 28934/28934 co-relation queries the response was YES. [2025-04-13 20:43:42,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14073 conditions, 1817 events. 985/1817 cut-off events. For 28934/28934 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10553 event pairs, 87 based on Foata normal form. 3/1814 useless extension candidates. Maximal degree in co-relation 13967. Up to 1529 conditions per place. [2025-04-13 20:43:42,367 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 321 selfloop transitions, 116 changer transitions 19/456 dead transitions. [2025-04-13 20:43:42,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 456 transitions, 6943 flow [2025-04-13 20:43:42,368 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-04-13 20:43:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-04-13 20:43:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 245 transitions. [2025-04-13 20:43:42,368 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2648648648648649 [2025-04-13 20:43:42,368 INFO L175 Difference]: Start difference. First operand has 314 places, 359 transitions, 5117 flow. Second operand 37 states and 245 transitions. [2025-04-13 20:43:42,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 456 transitions, 6943 flow [2025-04-13 20:43:42,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 456 transitions, 6748 flow, removed 36 selfloop flow, removed 26 redundant places. [2025-04-13 20:43:42,515 INFO L231 Difference]: Finished difference. Result has 319 places, 382 transitions, 5658 flow [2025-04-13 20:43:42,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5658, PETRI_PLACES=319, PETRI_TRANSITIONS=382} [2025-04-13 20:43:42,515 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 295 predicate places. [2025-04-13 20:43:42,515 INFO L485 AbstractCegarLoop]: Abstraction has has 319 places, 382 transitions, 5658 flow [2025-04-13 20:43:42,515 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:42,515 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:42,515 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:42,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-13 20:43:42,716 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,SelfDestructingSolverStorable22 [2025-04-13 20:43:42,716 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 20:43:42,717 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2066625979, now seen corresponding path program 13 times [2025-04-13 20:43:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:42,717 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253367246] [2025-04-13 20:43:42,717 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:43:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:42,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:43:42,727 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:42,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:43:42,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:43,174 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 20:43:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:43,174 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253367246] [2025-04-13 20:43:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253367246] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:43,174 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919022961] [2025-04-13 20:43:43,174 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:43:43,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:43,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:43,176 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 20:43:43,177 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 20:43:43,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:43:43,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:43,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:43:43,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:43,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 20:43:43,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:43,520 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-04-13 20:43:43,650 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 20:43:43,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:43,935 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:43,935 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 40 treesize of output 32 [2025-04-13 20:43:44,241 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 20:43:44,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919022961] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:44,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:44,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2025-04-13 20:43:44,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428298264] [2025-04-13 20:43:44,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:44,242 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:43:44,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:44,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:43:44,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1429, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:43:44,243 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:44,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 382 transitions, 5658 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:44,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:44,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:44,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:46,502 INFO L116 PetriNetUnfolderBase]: 1033/1909 cut-off events. [2025-04-13 20:43:46,502 INFO L117 PetriNetUnfolderBase]: For 32469/32469 co-relation queries the response was YES. [2025-04-13 20:43:46,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15247 conditions, 1909 events. 1033/1909 cut-off events. For 32469/32469 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11279 event pairs, 86 based on Foata normal form. 4/1907 useless extension candidates. Maximal degree in co-relation 15141. Up to 1501 conditions per place. [2025-04-13 20:43:46,519 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 307 selfloop transitions, 131 changer transitions 27/465 dead transitions. [2025-04-13 20:43:46,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 465 transitions, 7328 flow [2025-04-13 20:43:46,519 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-04-13 20:43:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-04-13 20:43:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 238 transitions. [2025-04-13 20:43:46,520 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2572972972972973 [2025-04-13 20:43:46,520 INFO L175 Difference]: Start difference. First operand has 319 places, 382 transitions, 5658 flow. Second operand 37 states and 238 transitions. [2025-04-13 20:43:46,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 465 transitions, 7328 flow [2025-04-13 20:43:46,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 465 transitions, 6886 flow, removed 164 selfloop flow, removed 19 redundant places. [2025-04-13 20:43:46,678 INFO L231 Difference]: Finished difference. Result has 340 places, 386 transitions, 5739 flow [2025-04-13 20:43:46,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5739, PETRI_PLACES=340, PETRI_TRANSITIONS=386} [2025-04-13 20:43:46,678 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 316 predicate places. [2025-04-13 20:43:46,679 INFO L485 AbstractCegarLoop]: Abstraction has has 340 places, 386 transitions, 5739 flow [2025-04-13 20:43:46,679 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:46,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:46,679 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:46,685 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 20:43:46,879 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:46,879 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 20:43:46,880 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash 761233697, now seen corresponding path program 14 times [2025-04-13 20:43:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:46,880 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898000363] [2025-04-13 20:43:46,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:43:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:46,884 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:46,891 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:46,891 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:46,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:47,314 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 20:43:47,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:47,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898000363] [2025-04-13 20:43:47,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898000363] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:47,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608556914] [2025-04-13 20:43:47,314 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:43:47,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:47,316 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 20:43:47,316 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 20:43:47,354 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:47,392 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:47,393 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:47,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:47,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:43:47,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:47,791 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 20:43:47,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:48,060 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:48,061 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 40 treesize of output 32 [2025-04-13 20:43:48,337 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 20:43:48,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608556914] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:48,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:48,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2025-04-13 20:43:48,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667053581] [2025-04-13 20:43:48,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:48,338 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-04-13 20:43:48,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:48,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-04-13 20:43:48,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2025-04-13 20:43:48,338 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:48,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 386 transitions, 5739 flow. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:48,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:48,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:48,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:49,767 INFO L116 PetriNetUnfolderBase]: 1028/1910 cut-off events. [2025-04-13 20:43:49,768 INFO L117 PetriNetUnfolderBase]: For 35666/35666 co-relation queries the response was YES. [2025-04-13 20:43:49,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15589 conditions, 1910 events. 1028/1910 cut-off events. For 35666/35666 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11299 event pairs, 92 based on Foata normal form. 3/1907 useless extension candidates. Maximal degree in co-relation 15477. Up to 1653 conditions per place. [2025-04-13 20:43:49,784 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 364 selfloop transitions, 89 changer transitions 12/465 dead transitions. [2025-04-13 20:43:49,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 465 transitions, 7320 flow [2025-04-13 20:43:49,785 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-13 20:43:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-13 20:43:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 221 transitions. [2025-04-13 20:43:49,785 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26 [2025-04-13 20:43:49,785 INFO L175 Difference]: Start difference. First operand has 340 places, 386 transitions, 5739 flow. Second operand 34 states and 221 transitions. [2025-04-13 20:43:49,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 465 transitions, 7320 flow [2025-04-13 20:43:49,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 465 transitions, 6914 flow, removed 138 selfloop flow, removed 23 redundant places. [2025-04-13 20:43:49,965 INFO L231 Difference]: Finished difference. Result has 352 places, 395 transitions, 5820 flow [2025-04-13 20:43:49,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5333, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5820, PETRI_PLACES=352, PETRI_TRANSITIONS=395} [2025-04-13 20:43:49,965 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 328 predicate places. [2025-04-13 20:43:49,965 INFO L485 AbstractCegarLoop]: Abstraction has has 352 places, 395 transitions, 5820 flow [2025-04-13 20:43:49,966 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:49,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:49,966 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:49,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-13 20:43:50,166 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:50,166 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 20:43:50,167 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:50,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1547202799, now seen corresponding path program 15 times [2025-04-13 20:43:50,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:50,167 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654657771] [2025-04-13 20:43:50,167 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:43:50,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:50,171 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:50,182 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:50,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:43:50,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:50,702 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 20:43:50,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:50,703 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654657771] [2025-04-13 20:43:50,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654657771] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:50,703 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973258938] [2025-04-13 20:43:50,703 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:43:50,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:50,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:50,705 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 20:43:50,705 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 20:43:50,742 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:50,772 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:50,772 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:43:50,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:50,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 20:43:50,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:50,964 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 9 treesize of output 3 [2025-04-13 20:43:51,112 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 20:43:51,112 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:51,460 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:51,460 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 43 treesize of output 35 [2025-04-13 20:43:51,741 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 20:43:51,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973258938] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:51,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:51,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 38 [2025-04-13 20:43:51,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214258299] [2025-04-13 20:43:51,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:51,742 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-04-13 20:43:51,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:51,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-04-13 20:43:51,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2025-04-13 20:43:51,743 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:51,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 395 transitions, 5820 flow. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:51,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:51,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:51,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:53,359 INFO L116 PetriNetUnfolderBase]: 1034/1923 cut-off events. [2025-04-13 20:43:53,359 INFO L117 PetriNetUnfolderBase]: For 38096/38096 co-relation queries the response was YES. [2025-04-13 20:43:53,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15589 conditions, 1923 events. 1034/1923 cut-off events. For 38096/38096 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11480 event pairs, 101 based on Foata normal form. 3/1920 useless extension candidates. Maximal degree in co-relation 15474. Up to 1643 conditions per place. [2025-04-13 20:43:53,377 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 327 selfloop transitions, 96 changer transitions 24/447 dead transitions. [2025-04-13 20:43:53,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 447 transitions, 7099 flow [2025-04-13 20:43:53,378 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-13 20:43:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-13 20:43:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 179 transitions. [2025-04-13 20:43:53,379 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2651851851851852 [2025-04-13 20:43:53,379 INFO L175 Difference]: Start difference. First operand has 352 places, 395 transitions, 5820 flow. Second operand 27 states and 179 transitions. [2025-04-13 20:43:53,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 447 transitions, 7099 flow [2025-04-13 20:43:53,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 447 transitions, 6841 flow, removed 86 selfloop flow, removed 23 redundant places. [2025-04-13 20:43:53,559 INFO L231 Difference]: Finished difference. Result has 355 places, 387 transitions, 5710 flow [2025-04-13 20:43:53,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5710, PETRI_PLACES=355, PETRI_TRANSITIONS=387} [2025-04-13 20:43:53,560 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 331 predicate places. [2025-04-13 20:43:53,560 INFO L485 AbstractCegarLoop]: Abstraction has has 355 places, 387 transitions, 5710 flow [2025-04-13 20:43:53,560 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:53,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:53,560 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:53,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-04-13 20:43:53,761 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,SelfDestructingSolverStorable25 [2025-04-13 20:43:53,761 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 20:43:53,762 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1589767749, now seen corresponding path program 16 times [2025-04-13 20:43:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:53,762 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445258599] [2025-04-13 20:43:53,762 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:43:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:53,766 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:53,784 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 20:43:53,784 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:43:53,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:54,220 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 20:43:54,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:54,220 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445258599] [2025-04-13 20:43:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445258599] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:54,221 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087769345] [2025-04-13 20:43:54,221 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:43:54,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:54,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:54,223 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 20:43:54,223 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 20:43:54,264 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:54,290 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 20:43:54,291 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:43:54,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:54,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-13 20:43:54,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:43:54,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:54,960 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:54,960 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 34 treesize of output 26 [2025-04-13 20:43:55,224 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 20:43:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087769345] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:55,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:43:55,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692832674] [2025-04-13 20:43:55,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:55,225 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:43:55,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:55,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:43:55,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:43:55,226 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:55,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 387 transitions, 5710 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:55,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:55,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:55,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:43:56,944 INFO L116 PetriNetUnfolderBase]: 1117/2059 cut-off events. [2025-04-13 20:43:56,944 INFO L117 PetriNetUnfolderBase]: For 42527/42527 co-relation queries the response was YES. [2025-04-13 20:43:56,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17354 conditions, 2059 events. 1117/2059 cut-off events. For 42527/42527 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 12348 event pairs, 103 based on Foata normal form. 4/2055 useless extension candidates. Maximal degree in co-relation 17238. Up to 1837 conditions per place. [2025-04-13 20:43:56,961 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 392 selfloop transitions, 94 changer transitions 19/505 dead transitions. [2025-04-13 20:43:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 505 transitions, 8308 flow [2025-04-13 20:43:56,961 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-04-13 20:43:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-04-13 20:43:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 235 transitions. [2025-04-13 20:43:56,962 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24102564102564103 [2025-04-13 20:43:56,962 INFO L175 Difference]: Start difference. First operand has 355 places, 387 transitions, 5710 flow. Second operand 39 states and 235 transitions. [2025-04-13 20:43:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 505 transitions, 8308 flow [2025-04-13 20:43:57,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 505 transitions, 8044 flow, removed 22 selfloop flow, removed 25 redundant places. [2025-04-13 20:43:57,139 INFO L231 Difference]: Finished difference. Result has 376 places, 440 transitions, 6977 flow [2025-04-13 20:43:57,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5476, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6977, PETRI_PLACES=376, PETRI_TRANSITIONS=440} [2025-04-13 20:43:57,140 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 352 predicate places. [2025-04-13 20:43:57,140 INFO L485 AbstractCegarLoop]: Abstraction has has 376 places, 440 transitions, 6977 flow [2025-04-13 20:43:57,140 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:57,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:43:57,140 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:43:57,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-04-13 20:43:57,340 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,SelfDestructingSolverStorable26 [2025-04-13 20:43:57,341 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 20:43:57,341 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:43:57,341 INFO L85 PathProgramCache]: Analyzing trace with hash -521629193, now seen corresponding path program 17 times [2025-04-13 20:43:57,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:43:57,341 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315371839] [2025-04-13 20:43:57,341 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:43:57,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:43:57,346 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:57,351 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:57,351 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:57,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:57,855 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 20:43:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:43:57,856 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315371839] [2025-04-13 20:43:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315371839] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:43:57,856 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911595843] [2025-04-13 20:43:57,856 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:43:57,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:43:57,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:43:57,858 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 20:43:57,859 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 20:43:57,896 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:43:57,919 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:43:57,919 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:43:57,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:43:57,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:43:57,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:43:58,146 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:58,147 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2025-04-13 20:43:58,375 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 20:43:58,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:43:58,789 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:43:58,789 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 45 treesize of output 37 [2025-04-13 20:43:59,138 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 20:43:59,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911595843] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:43:59,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:43:59,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 38 [2025-04-13 20:43:59,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464746333] [2025-04-13 20:43:59,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:43:59,139 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-04-13 20:43:59,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:43:59,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-04-13 20:43:59,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2025-04-13 20:43:59,140 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:43:59,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 440 transitions, 6977 flow. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:43:59,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:43:59,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:43:59,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:02,852 INFO L116 PetriNetUnfolderBase]: 1202/2225 cut-off events. [2025-04-13 20:44:02,853 INFO L117 PetriNetUnfolderBase]: For 64787/64787 co-relation queries the response was YES. [2025-04-13 20:44:02,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20088 conditions, 2225 events. 1202/2225 cut-off events. For 64787/64787 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13610 event pairs, 114 based on Foata normal form. 4/2223 useless extension candidates. Maximal degree in co-relation 19958. Up to 1811 conditions per place. [2025-04-13 20:44:02,876 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 401 selfloop transitions, 127 changer transitions 31/559 dead transitions. [2025-04-13 20:44:02,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 559 transitions, 9691 flow [2025-04-13 20:44:02,876 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-04-13 20:44:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-04-13 20:44:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 310 transitions. [2025-04-13 20:44:02,877 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2530612244897959 [2025-04-13 20:44:02,877 INFO L175 Difference]: Start difference. First operand has 376 places, 440 transitions, 6977 flow. Second operand 49 states and 310 transitions. [2025-04-13 20:44:02,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 559 transitions, 9691 flow [2025-04-13 20:44:03,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 559 transitions, 9188 flow, removed 237 selfloop flow, removed 12 redundant places. [2025-04-13 20:44:03,199 INFO L231 Difference]: Finished difference. Result has 416 places, 456 transitions, 7526 flow [2025-04-13 20:44:03,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6656, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7526, PETRI_PLACES=416, PETRI_TRANSITIONS=456} [2025-04-13 20:44:03,200 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 392 predicate places. [2025-04-13 20:44:03,200 INFO L485 AbstractCegarLoop]: Abstraction has has 416 places, 456 transitions, 7526 flow [2025-04-13 20:44:03,200 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:03,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:03,200 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:03,206 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 20:44:03,400 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,SelfDestructingSolverStorable27 [2025-04-13 20:44:03,401 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 20:44:03,401 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2081158821, now seen corresponding path program 18 times [2025-04-13 20:44:03,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:03,402 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047197447] [2025-04-13 20:44:03,402 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:44:03,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:03,405 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:03,410 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 19 of 21 statements. [2025-04-13 20:44:03,410 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-04-13 20:44:03,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:44:03,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:03,574 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047197447] [2025-04-13 20:44:03,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047197447] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:44:03,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:44:03,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-04-13 20:44:03,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926063756] [2025-04-13 20:44:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:44:03,575 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-13 20:44:03,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:03,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-13 20:44:03,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-04-13 20:44:03,575 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:03,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 456 transitions, 7526 flow. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:03,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:03,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:03,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:04,067 INFO L116 PetriNetUnfolderBase]: 1197/2218 cut-off events. [2025-04-13 20:44:04,068 INFO L117 PetriNetUnfolderBase]: For 64883/64883 co-relation queries the response was YES. [2025-04-13 20:44:04,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20128 conditions, 2218 events. 1197/2218 cut-off events. For 64883/64883 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13664 event pairs, 122 based on Foata normal form. 5/2217 useless extension candidates. Maximal degree in co-relation 19991. Up to 2009 conditions per place. [2025-04-13 20:44:04,091 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 433 selfloop transitions, 42 changer transitions 18/493 dead transitions. [2025-04-13 20:44:04,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 493 transitions, 9275 flow [2025-04-13 20:44:04,092 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-13 20:44:04,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-13 20:44:04,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 77 transitions. [2025-04-13 20:44:04,092 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.308 [2025-04-13 20:44:04,092 INFO L175 Difference]: Start difference. First operand has 416 places, 456 transitions, 7526 flow. Second operand 10 states and 77 transitions. [2025-04-13 20:44:04,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 493 transitions, 9275 flow [2025-04-13 20:44:04,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 493 transitions, 8340 flow, removed 386 selfloop flow, removed 31 redundant places. [2025-04-13 20:44:04,386 INFO L231 Difference]: Finished difference. Result has 388 places, 458 transitions, 7087 flow [2025-04-13 20:44:04,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6922, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7087, PETRI_PLACES=388, PETRI_TRANSITIONS=458} [2025-04-13 20:44:04,387 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 364 predicate places. [2025-04-13 20:44:04,387 INFO L485 AbstractCegarLoop]: Abstraction has has 388 places, 458 transitions, 7087 flow [2025-04-13 20:44:04,387 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:04,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:04,387 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:04,387 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-04-13 20:44:04,388 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 20:44:04,388 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash -616650713, now seen corresponding path program 19 times [2025-04-13 20:44:04,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:04,388 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352891397] [2025-04-13 20:44:04,388 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:44:04,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:04,391 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:44:04,396 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:04,396 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:44:04,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:04,916 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 20:44:04,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:04,917 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352891397] [2025-04-13 20:44:04,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352891397] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:04,917 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715653266] [2025-04-13 20:44:04,917 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:44:04,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:04,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:04,919 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 20:44:04,920 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 20:44:04,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:44:04,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:04,982 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:44:04,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:04,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 20:44:04,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:05,361 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 20:44:05,361 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:05,614 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:05,614 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 42 treesize of output 34 [2025-04-13 20:44:05,932 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 20:44:05,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715653266] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:05,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:05,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2025-04-13 20:44:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648689335] [2025-04-13 20:44:05,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:05,932 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-04-13 20:44:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:05,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-04-13 20:44:05,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2025-04-13 20:44:05,933 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:05,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 458 transitions, 7087 flow. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:05,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:05,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:05,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:08,926 INFO L116 PetriNetUnfolderBase]: 1172/2170 cut-off events. [2025-04-13 20:44:08,927 INFO L117 PetriNetUnfolderBase]: For 51674/51674 co-relation queries the response was YES. [2025-04-13 20:44:08,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18784 conditions, 2170 events. 1172/2170 cut-off events. For 51674/51674 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13278 event pairs, 116 based on Foata normal form. 3/2167 useless extension candidates. Maximal degree in co-relation 18650. Up to 1839 conditions per place. [2025-04-13 20:44:08,947 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 389 selfloop transitions, 122 changer transitions 15/526 dead transitions. [2025-04-13 20:44:08,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 526 transitions, 8604 flow [2025-04-13 20:44:08,948 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-04-13 20:44:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-04-13 20:44:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 246 transitions. [2025-04-13 20:44:08,948 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2523076923076923 [2025-04-13 20:44:08,948 INFO L175 Difference]: Start difference. First operand has 388 places, 458 transitions, 7087 flow. Second operand 39 states and 246 transitions. [2025-04-13 20:44:08,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 526 transitions, 8604 flow [2025-04-13 20:44:09,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 526 transitions, 8494 flow, removed 35 selfloop flow, removed 4 redundant places. [2025-04-13 20:44:09,225 INFO L231 Difference]: Finished difference. Result has 424 places, 455 transitions, 7243 flow [2025-04-13 20:44:09,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6969, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=7243, PETRI_PLACES=424, PETRI_TRANSITIONS=455} [2025-04-13 20:44:09,226 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 400 predicate places. [2025-04-13 20:44:09,226 INFO L485 AbstractCegarLoop]: Abstraction has has 424 places, 455 transitions, 7243 flow [2025-04-13 20:44:09,226 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:09,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:09,226 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:09,233 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 20:44:09,427 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 20:44:09,427 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 20:44:09,427 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1623366977, now seen corresponding path program 20 times [2025-04-13 20:44:09,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:09,428 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369597408] [2025-04-13 20:44:09,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:44:09,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:09,431 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:09,436 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:09,436 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:44:09,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:09,899 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 20:44:09,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:09,900 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369597408] [2025-04-13 20:44:09,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369597408] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:09,900 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69851634] [2025-04-13 20:44:09,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:44:09,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:09,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:09,902 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 20:44:09,902 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 20:44:09,943 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:09,970 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:09,970 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:44:09,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:09,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-13 20:44:09,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:10,163 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-04-13 20:44:10,315 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 20:44:10,315 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:10,657 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:10,657 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 34 treesize of output 26 [2025-04-13 20:44:10,929 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 20:44:10,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69851634] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:10,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:10,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:44:10,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781482672] [2025-04-13 20:44:10,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:10,930 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:44:10,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:10,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:44:10,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:44:10,930 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:10,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 455 transitions, 7243 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:10,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:10,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:10,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:12,916 INFO L116 PetriNetUnfolderBase]: 1254/2327 cut-off events. [2025-04-13 20:44:12,916 INFO L117 PetriNetUnfolderBase]: For 65188/65188 co-relation queries the response was YES. [2025-04-13 20:44:12,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20893 conditions, 2327 events. 1254/2327 cut-off events. For 65188/65188 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14478 event pairs, 123 based on Foata normal form. 4/2323 useless extension candidates. Maximal degree in co-relation 20754. Up to 2079 conditions per place. [2025-04-13 20:44:12,940 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 453 selfloop transitions, 92 changer transitions 31/576 dead transitions. [2025-04-13 20:44:12,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 576 transitions, 10176 flow [2025-04-13 20:44:12,940 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-04-13 20:44:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-04-13 20:44:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 258 transitions. [2025-04-13 20:44:12,941 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25170731707317073 [2025-04-13 20:44:12,941 INFO L175 Difference]: Start difference. First operand has 424 places, 455 transitions, 7243 flow. Second operand 41 states and 258 transitions. [2025-04-13 20:44:12,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 576 transitions, 10176 flow [2025-04-13 20:44:13,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 576 transitions, 9779 flow, removed 76 selfloop flow, removed 35 redundant places. [2025-04-13 20:44:13,276 INFO L231 Difference]: Finished difference. Result has 442 places, 494 transitions, 8148 flow [2025-04-13 20:44:13,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6879, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8148, PETRI_PLACES=442, PETRI_TRANSITIONS=494} [2025-04-13 20:44:13,277 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 418 predicate places. [2025-04-13 20:44:13,277 INFO L485 AbstractCegarLoop]: Abstraction has has 442 places, 494 transitions, 8148 flow [2025-04-13 20:44:13,277 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:13,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:13,277 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:13,284 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 20:44:13,478 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 20:44:13,478 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 20:44:13,478 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:13,479 INFO L85 PathProgramCache]: Analyzing trace with hash -502642501, now seen corresponding path program 21 times [2025-04-13 20:44:13,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:13,479 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884572905] [2025-04-13 20:44:13,479 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:44:13,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:13,482 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:13,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:13,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:44:13,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:13,958 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 20:44:13,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:13,959 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884572905] [2025-04-13 20:44:13,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884572905] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:13,959 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290833716] [2025-04-13 20:44:13,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:44:13,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:13,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:13,961 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 20:44:13,962 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 20:44:14,005 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:14,059 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:14,060 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:44:14,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:14,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:44:14,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:14,239 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2025-04-13 20:44:14,447 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 20:44:14,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:14,850 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:14,851 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 34 treesize of output 26 [2025-04-13 20:44:15,113 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 20:44:15,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290833716] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:15,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:15,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:44:15,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361807132] [2025-04-13 20:44:15,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:15,114 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:44:15,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:15,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:44:15,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:44:15,115 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:15,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 494 transitions, 8148 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:15,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:15,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:15,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:16,605 INFO L116 PetriNetUnfolderBase]: 1310/2442 cut-off events. [2025-04-13 20:44:16,605 INFO L117 PetriNetUnfolderBase]: For 80409/80409 co-relation queries the response was YES. [2025-04-13 20:44:16,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22447 conditions, 2442 events. 1310/2442 cut-off events. For 80409/80409 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15406 event pairs, 135 based on Foata normal form. 8/2444 useless extension candidates. Maximal degree in co-relation 22295. Up to 2194 conditions per place. [2025-04-13 20:44:16,635 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 477 selfloop transitions, 92 changer transitions 22/591 dead transitions. [2025-04-13 20:44:16,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 591 transitions, 10792 flow [2025-04-13 20:44:16,635 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:44:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:44:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 230 transitions. [2025-04-13 20:44:16,636 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25555555555555554 [2025-04-13 20:44:16,636 INFO L175 Difference]: Start difference. First operand has 442 places, 494 transitions, 8148 flow. Second operand 36 states and 230 transitions. [2025-04-13 20:44:16,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 591 transitions, 10792 flow [2025-04-13 20:44:17,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 591 transitions, 10115 flow, removed 310 selfloop flow, removed 17 redundant places. [2025-04-13 20:44:17,034 INFO L231 Difference]: Finished difference. Result has 463 places, 521 transitions, 8476 flow [2025-04-13 20:44:17,034 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7479, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8476, PETRI_PLACES=463, PETRI_TRANSITIONS=521} [2025-04-13 20:44:17,034 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 439 predicate places. [2025-04-13 20:44:17,034 INFO L485 AbstractCegarLoop]: Abstraction has has 463 places, 521 transitions, 8476 flow [2025-04-13 20:44:17,034 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:17,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:17,035 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:17,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-04-13 20:44:17,235 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 20:44:17,235 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 20:44:17,236 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash -650249941, now seen corresponding path program 22 times [2025-04-13 20:44:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:17,236 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269772922] [2025-04-13 20:44:17,236 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:44:17,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:17,240 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:17,245 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 20:44:17,245 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:44:17,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:17,628 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 20:44:17,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:17,628 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269772922] [2025-04-13 20:44:17,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269772922] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:17,628 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687477631] [2025-04-13 20:44:17,628 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:44:17,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:17,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:17,630 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 20:44:17,631 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 20:44:17,675 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:17,695 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 20:44:17,695 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:44:17,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:17,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-13 20:44:17,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:17,899 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-04-13 20:44:18,050 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 20:44:18,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:18,256 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:18,256 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 42 treesize of output 34 [2025-04-13 20:44:18,562 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 20:44:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687477631] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:18,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:18,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2025-04-13 20:44:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030695331] [2025-04-13 20:44:18,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:18,562 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:44:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:18,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:44:18,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:44:18,563 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:18,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 521 transitions, 8476 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:18,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:18,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:18,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:20,414 INFO L116 PetriNetUnfolderBase]: 1309/2441 cut-off events. [2025-04-13 20:44:20,414 INFO L117 PetriNetUnfolderBase]: For 75342/75342 co-relation queries the response was YES. [2025-04-13 20:44:20,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22156 conditions, 2441 events. 1309/2441 cut-off events. For 75342/75342 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15466 event pairs, 139 based on Foata normal form. 5/2440 useless extension candidates. Maximal degree in co-relation 21996. Up to 2178 conditions per place. [2025-04-13 20:44:20,442 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 465 selfloop transitions, 68 changer transitions 52/585 dead transitions. [2025-04-13 20:44:20,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 585 transitions, 10076 flow [2025-04-13 20:44:20,446 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-13 20:44:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-13 20:44:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 218 transitions. [2025-04-13 20:44:20,447 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24914285714285714 [2025-04-13 20:44:20,447 INFO L175 Difference]: Start difference. First operand has 463 places, 521 transitions, 8476 flow. Second operand 35 states and 218 transitions. [2025-04-13 20:44:20,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 585 transitions, 10076 flow [2025-04-13 20:44:20,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 585 transitions, 9458 flow, removed 282 selfloop flow, removed 18 redundant places. [2025-04-13 20:44:20,909 INFO L231 Difference]: Finished difference. Result has 481 places, 500 transitions, 7764 flow [2025-04-13 20:44:20,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7858, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7764, PETRI_PLACES=481, PETRI_TRANSITIONS=500} [2025-04-13 20:44:20,909 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 457 predicate places. [2025-04-13 20:44:20,909 INFO L485 AbstractCegarLoop]: Abstraction has has 481 places, 500 transitions, 7764 flow [2025-04-13 20:44:20,909 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:20,909 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:20,910 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:20,915 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 20:44:21,110 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 20:44:21,110 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 20:44:21,111 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:21,111 INFO L85 PathProgramCache]: Analyzing trace with hash -506967001, now seen corresponding path program 23 times [2025-04-13 20:44:21,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:21,111 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575455718] [2025-04-13 20:44:21,111 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:44:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:21,114 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:21,119 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:21,120 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:44:21,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:21,446 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 20:44:21,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:21,446 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575455718] [2025-04-13 20:44:21,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575455718] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:21,446 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775754368] [2025-04-13 20:44:21,447 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:44:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:21,448 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 20:44:21,449 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 20:44:21,488 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:21,522 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:21,522 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:44:21,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:21,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-04-13 20:44:21,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:21,730 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2025-04-13 20:44:21,873 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 20:44:21,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:22,239 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:22,239 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 34 treesize of output 26 [2025-04-13 20:44:22,475 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 20:44:22,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775754368] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:22,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:22,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 38 [2025-04-13 20:44:22,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224249063] [2025-04-13 20:44:22,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:22,476 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-04-13 20:44:22,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:22,477 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-04-13 20:44:22,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2025-04-13 20:44:22,477 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:22,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 500 transitions, 7764 flow. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:22,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:22,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:22,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:24,440 INFO L116 PetriNetUnfolderBase]: 1275/2364 cut-off events. [2025-04-13 20:44:24,440 INFO L117 PetriNetUnfolderBase]: For 74348/74348 co-relation queries the response was YES. [2025-04-13 20:44:24,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21303 conditions, 2364 events. 1275/2364 cut-off events. For 74348/74348 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14632 event pairs, 134 based on Foata normal form. 5/2359 useless extension candidates. Maximal degree in co-relation 21139. Up to 2112 conditions per place. [2025-04-13 20:44:24,465 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 453 selfloop transitions, 75 changer transitions 41/569 dead transitions. [2025-04-13 20:44:24,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 569 transitions, 9560 flow [2025-04-13 20:44:24,466 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-13 20:44:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-13 20:44:24,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 223 transitions. [2025-04-13 20:44:24,466 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2477777777777778 [2025-04-13 20:44:24,466 INFO L175 Difference]: Start difference. First operand has 481 places, 500 transitions, 7764 flow. Second operand 36 states and 223 transitions. [2025-04-13 20:44:24,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 569 transitions, 9560 flow [2025-04-13 20:44:24,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 569 transitions, 9233 flow, removed 95 selfloop flow, removed 36 redundant places. [2025-04-13 20:44:24,866 INFO L231 Difference]: Finished difference. Result has 465 places, 491 transitions, 7604 flow [2025-04-13 20:44:24,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7485, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7604, PETRI_PLACES=465, PETRI_TRANSITIONS=491} [2025-04-13 20:44:24,866 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 441 predicate places. [2025-04-13 20:44:24,867 INFO L485 AbstractCegarLoop]: Abstraction has has 465 places, 491 transitions, 7604 flow [2025-04-13 20:44:24,867 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:24,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:24,867 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:24,873 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 20:44:25,067 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 20:44:25,067 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 20:44:25,068 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:25,068 INFO L85 PathProgramCache]: Analyzing trace with hash -624656835, now seen corresponding path program 24 times [2025-04-13 20:44:25,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:25,068 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703168427] [2025-04-13 20:44:25,068 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:44:25,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:25,072 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:25,078 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:25,078 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:44:25,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:25,476 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 20:44:25,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:25,477 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703168427] [2025-04-13 20:44:25,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703168427] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:25,477 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058266663] [2025-04-13 20:44:25,477 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:44:25,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:25,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:25,479 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 20:44:25,479 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 20:44:25,521 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:25,547 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:25,547 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:44:25,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:25,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 20:44:25,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:25,965 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 20:44:25,966 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:26,335 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:26,335 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 34 treesize of output 26 [2025-04-13 20:44:26,585 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 20:44:26,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058266663] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:26,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:26,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:44:26,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738844422] [2025-04-13 20:44:26,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:26,586 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:44:26,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:26,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:44:26,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:44:26,587 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:26,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 491 transitions, 7604 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:26,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:26,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:26,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:28,479 INFO L116 PetriNetUnfolderBase]: 1282/2367 cut-off events. [2025-04-13 20:44:28,479 INFO L117 PetriNetUnfolderBase]: For 75351/75351 co-relation queries the response was YES. [2025-04-13 20:44:28,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21535 conditions, 2367 events. 1282/2367 cut-off events. For 75351/75351 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 14759 event pairs, 130 based on Foata normal form. 4/2363 useless extension candidates. Maximal degree in co-relation 21380. Up to 2071 conditions per place. [2025-04-13 20:44:28,508 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 441 selfloop transitions, 119 changer transitions 18/578 dead transitions. [2025-04-13 20:44:28,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 578 transitions, 9838 flow [2025-04-13 20:44:28,509 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-04-13 20:44:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-04-13 20:44:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 243 transitions. [2025-04-13 20:44:28,510 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24923076923076923 [2025-04-13 20:44:28,510 INFO L175 Difference]: Start difference. First operand has 465 places, 491 transitions, 7604 flow. Second operand 39 states and 243 transitions. [2025-04-13 20:44:28,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 578 transitions, 9838 flow [2025-04-13 20:44:28,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 578 transitions, 9602 flow, removed 46 selfloop flow, removed 29 redundant places. [2025-04-13 20:44:28,892 INFO L231 Difference]: Finished difference. Result has 464 places, 506 transitions, 8245 flow [2025-04-13 20:44:28,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7380, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8245, PETRI_PLACES=464, PETRI_TRANSITIONS=506} [2025-04-13 20:44:28,892 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 440 predicate places. [2025-04-13 20:44:28,892 INFO L485 AbstractCegarLoop]: Abstraction has has 464 places, 506 transitions, 8245 flow [2025-04-13 20:44:28,893 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:28,893 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:28,893 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:28,900 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 20:44:29,093 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 20:44:29,093 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 20:44:29,094 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash -256669185, now seen corresponding path program 25 times [2025-04-13 20:44:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:29,094 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896601000] [2025-04-13 20:44:29,094 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:44:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:29,097 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:44:29,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:29,102 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:44:29,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:29,482 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 20:44:29,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:29,482 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896601000] [2025-04-13 20:44:29,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896601000] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:29,482 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359292781] [2025-04-13 20:44:29,482 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:44:29,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:29,484 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 20:44:29,485 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 20:44:29,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:44:29,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:29,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:44:29,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:29,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 20:44:29,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:29,878 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 20:44:29,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:30,234 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:30,235 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 34 treesize of output 26 [2025-04-13 20:44:30,495 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 20:44:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359292781] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:30,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:30,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:44:30,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861064119] [2025-04-13 20:44:30,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:30,496 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:44:30,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:30,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:44:30,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:44:30,496 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:30,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 506 transitions, 8245 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:30,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:30,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:30,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:32,577 INFO L116 PetriNetUnfolderBase]: 1297/2405 cut-off events. [2025-04-13 20:44:32,577 INFO L117 PetriNetUnfolderBase]: For 93048/93048 co-relation queries the response was YES. [2025-04-13 20:44:32,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22899 conditions, 2405 events. 1297/2405 cut-off events. For 93048/93048 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 15141 event pairs, 133 based on Foata normal form. 5/2402 useless extension candidates. Maximal degree in co-relation 22746. Up to 1967 conditions per place. [2025-04-13 20:44:32,604 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 405 selfloop transitions, 156 changer transitions 29/590 dead transitions. [2025-04-13 20:44:32,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 590 transitions, 10603 flow [2025-04-13 20:44:32,605 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-04-13 20:44:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-04-13 20:44:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 265 transitions. [2025-04-13 20:44:32,605 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25853658536585367 [2025-04-13 20:44:32,605 INFO L175 Difference]: Start difference. First operand has 464 places, 506 transitions, 8245 flow. Second operand 41 states and 265 transitions. [2025-04-13 20:44:32,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 590 transitions, 10603 flow [2025-04-13 20:44:33,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 590 transitions, 9857 flow, removed 302 selfloop flow, removed 25 redundant places. [2025-04-13 20:44:33,045 INFO L231 Difference]: Finished difference. Result has 481 places, 502 transitions, 8202 flow [2025-04-13 20:44:33,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7699, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8202, PETRI_PLACES=481, PETRI_TRANSITIONS=502} [2025-04-13 20:44:33,045 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 457 predicate places. [2025-04-13 20:44:33,046 INFO L485 AbstractCegarLoop]: Abstraction has has 481 places, 502 transitions, 8202 flow [2025-04-13 20:44:33,046 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:33,046 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:33,046 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:33,051 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 20:44:33,246 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 20:44:33,246 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 20:44:33,247 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash -16772085, now seen corresponding path program 26 times [2025-04-13 20:44:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:33,247 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823762608] [2025-04-13 20:44:33,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:44:33,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:33,251 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:33,255 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 21 statements. [2025-04-13 20:44:33,255 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:44:33,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:44:33,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:33,420 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823762608] [2025-04-13 20:44:33,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823762608] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:44:33,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:44:33,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-04-13 20:44:33,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771493145] [2025-04-13 20:44:33,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:44:33,420 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-13 20:44:33,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:33,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-13 20:44:33,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-04-13 20:44:33,421 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:33,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 502 transitions, 8202 flow. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:33,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:33,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:33,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:33,961 INFO L116 PetriNetUnfolderBase]: 1337/2478 cut-off events. [2025-04-13 20:44:33,961 INFO L117 PetriNetUnfolderBase]: For 97889/97889 co-relation queries the response was YES. [2025-04-13 20:44:33,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23737 conditions, 2478 events. 1337/2478 cut-off events. For 97889/97889 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15712 event pairs, 130 based on Foata normal form. 2/2472 useless extension candidates. Maximal degree in co-relation 23580. Up to 2000 conditions per place. [2025-04-13 20:44:33,990 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 412 selfloop transitions, 123 changer transitions 16/551 dead transitions. [2025-04-13 20:44:33,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 551 transitions, 10110 flow [2025-04-13 20:44:33,991 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-13 20:44:33,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-13 20:44:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2025-04-13 20:44:33,991 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.336 [2025-04-13 20:44:33,991 INFO L175 Difference]: Start difference. First operand has 481 places, 502 transitions, 8202 flow. Second operand 10 states and 84 transitions. [2025-04-13 20:44:33,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 551 transitions, 10110 flow [2025-04-13 20:44:34,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 551 transitions, 9715 flow, removed 92 selfloop flow, removed 35 redundant places. [2025-04-13 20:44:34,434 INFO L231 Difference]: Finished difference. Result has 453 places, 512 transitions, 8541 flow [2025-04-13 20:44:34,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7811, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8541, PETRI_PLACES=453, PETRI_TRANSITIONS=512} [2025-04-13 20:44:34,434 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 429 predicate places. [2025-04-13 20:44:34,434 INFO L485 AbstractCegarLoop]: Abstraction has has 453 places, 512 transitions, 8541 flow [2025-04-13 20:44:34,435 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:34,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:34,435 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:34,435 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2025-04-13 20:44:34,435 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 20:44:34,435 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1353793599, now seen corresponding path program 27 times [2025-04-13 20:44:34,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:34,435 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660455211] [2025-04-13 20:44:34,435 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:44:34,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:34,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:34,446 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 19 of 21 statements. [2025-04-13 20:44:34,446 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:44:34,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:44:34,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:34,603 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660455211] [2025-04-13 20:44:34,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660455211] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:44:34,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:44:34,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-04-13 20:44:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886556362] [2025-04-13 20:44:34,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:44:34,603 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-13 20:44:34,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:34,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-13 20:44:34,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-04-13 20:44:34,604 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:34,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 512 transitions, 8541 flow. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:34,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:34,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:34,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:35,122 INFO L116 PetriNetUnfolderBase]: 1312/2433 cut-off events. [2025-04-13 20:44:35,122 INFO L117 PetriNetUnfolderBase]: For 98999/98999 co-relation queries the response was YES. [2025-04-13 20:44:35,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23722 conditions, 2433 events. 1312/2433 cut-off events. For 98999/98999 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15324 event pairs, 147 based on Foata normal form. 1/2426 useless extension candidates. Maximal degree in co-relation 23564. Up to 2263 conditions per place. [2025-04-13 20:44:35,155 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 469 selfloop transitions, 59 changer transitions 11/539 dead transitions. [2025-04-13 20:44:35,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 539 transitions, 10141 flow [2025-04-13 20:44:35,155 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 20:44:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 20:44:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 76 transitions. [2025-04-13 20:44:35,156 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3377777777777778 [2025-04-13 20:44:35,156 INFO L175 Difference]: Start difference. First operand has 453 places, 512 transitions, 8541 flow. Second operand 9 states and 76 transitions. [2025-04-13 20:44:35,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 539 transitions, 10141 flow [2025-04-13 20:44:35,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 539 transitions, 9779 flow, removed 132 selfloop flow, removed 7 redundant places. [2025-04-13 20:44:35,731 INFO L231 Difference]: Finished difference. Result has 456 places, 513 transitions, 8474 flow [2025-04-13 20:44:35,732 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8191, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8474, PETRI_PLACES=456, PETRI_TRANSITIONS=513} [2025-04-13 20:44:35,732 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 432 predicate places. [2025-04-13 20:44:35,732 INFO L485 AbstractCegarLoop]: Abstraction has has 456 places, 513 transitions, 8474 flow [2025-04-13 20:44:35,732 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:35,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:35,733 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:35,733 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2025-04-13 20:44:35,733 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 20:44:35,733 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash -285799763, now seen corresponding path program 28 times [2025-04-13 20:44:35,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:35,733 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415701155] [2025-04-13 20:44:35,734 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:44:35,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:35,740 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:35,744 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 20:44:35,744 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:44:35,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:36,092 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 20:44:36,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:36,092 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415701155] [2025-04-13 20:44:36,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415701155] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:36,092 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828365519] [2025-04-13 20:44:36,092 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:44:36,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:36,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:36,094 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 20:44:36,096 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 20:44:36,144 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:36,165 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 20:44:36,165 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:44:36,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:36,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-04-13 20:44:36,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:36,379 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-04-13 20:44:36,524 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 20:44:36,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:36,807 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:36,808 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 45 treesize of output 37 [2025-04-13 20:44:37,104 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 20:44:37,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828365519] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:37,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:37,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 38 [2025-04-13 20:44:37,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015604818] [2025-04-13 20:44:37,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:37,105 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-04-13 20:44:37,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:37,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-04-13 20:44:37,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2025-04-13 20:44:37,106 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:37,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 513 transitions, 8474 flow. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:37,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:37,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:37,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:38,846 INFO L116 PetriNetUnfolderBase]: 1319/2466 cut-off events. [2025-04-13 20:44:38,846 INFO L117 PetriNetUnfolderBase]: For 96077/96077 co-relation queries the response was YES. [2025-04-13 20:44:38,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23774 conditions, 2466 events. 1319/2466 cut-off events. For 96077/96077 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15701 event pairs, 146 based on Foata normal form. 3/2465 useless extension candidates. Maximal degree in co-relation 23612. Up to 2269 conditions per place. [2025-04-13 20:44:38,879 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 474 selfloop transitions, 81 changer transitions 23/578 dead transitions. [2025-04-13 20:44:38,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 578 transitions, 10527 flow [2025-04-13 20:44:38,879 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-13 20:44:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-13 20:44:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 196 transitions. [2025-04-13 20:44:38,880 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.245 [2025-04-13 20:44:38,880 INFO L175 Difference]: Start difference. First operand has 456 places, 513 transitions, 8474 flow. Second operand 32 states and 196 transitions. [2025-04-13 20:44:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 578 transitions, 10527 flow [2025-04-13 20:44:39,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 578 transitions, 10166 flow, removed 141 selfloop flow, removed 5 redundant places. [2025-04-13 20:44:39,379 INFO L231 Difference]: Finished difference. Result has 487 places, 518 transitions, 8732 flow [2025-04-13 20:44:39,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8281, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8732, PETRI_PLACES=487, PETRI_TRANSITIONS=518} [2025-04-13 20:44:39,379 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 463 predicate places. [2025-04-13 20:44:39,380 INFO L485 AbstractCegarLoop]: Abstraction has has 487 places, 518 transitions, 8732 flow [2025-04-13 20:44:39,380 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:39,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:39,380 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:39,385 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 20:44:39,580 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,SelfDestructingSolverStorable38 [2025-04-13 20:44:39,580 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 20:44:39,581 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash 834924713, now seen corresponding path program 29 times [2025-04-13 20:44:39,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:39,581 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168900961] [2025-04-13 20:44:39,581 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:44:39,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:39,585 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:39,591 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:39,591 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:44:39,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:39,988 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 20:44:39,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:39,989 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168900961] [2025-04-13 20:44:39,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168900961] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:39,989 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139691153] [2025-04-13 20:44:39,989 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:44:39,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:39,991 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 20:44:39,991 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 20:44:40,036 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:40,060 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:40,060 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:44:40,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:40,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:44:40,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:40,242 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:40,242 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2025-04-13 20:44:40,433 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 20:44:40,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:40,764 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:40,764 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 45 treesize of output 37 [2025-04-13 20:44:41,090 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 20:44:41,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139691153] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:41,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:41,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 38 [2025-04-13 20:44:41,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056102139] [2025-04-13 20:44:41,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:41,091 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-04-13 20:44:41,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:41,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-04-13 20:44:41,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2025-04-13 20:44:41,092 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:41,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 518 transitions, 8732 flow. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:41,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:41,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:41,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:43,472 INFO L116 PetriNetUnfolderBase]: 1361/2541 cut-off events. [2025-04-13 20:44:43,473 INFO L117 PetriNetUnfolderBase]: For 109172/109172 co-relation queries the response was YES. [2025-04-13 20:44:43,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25220 conditions, 2541 events. 1361/2541 cut-off events. For 109172/109172 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16300 event pairs, 152 based on Foata normal form. 3/2540 useless extension candidates. Maximal degree in co-relation 25053. Up to 2288 conditions per place. [2025-04-13 20:44:43,510 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 488 selfloop transitions, 99 changer transitions 14/601 dead transitions. [2025-04-13 20:44:43,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 601 transitions, 11254 flow [2025-04-13 20:44:43,510 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-13 20:44:43,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-13 20:44:43,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 221 transitions. [2025-04-13 20:44:43,511 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25257142857142856 [2025-04-13 20:44:43,511 INFO L175 Difference]: Start difference. First operand has 487 places, 518 transitions, 8732 flow. Second operand 35 states and 221 transitions. [2025-04-13 20:44:43,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 601 transitions, 11254 flow [2025-04-13 20:44:44,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 601 transitions, 10749 flow, removed 180 selfloop flow, removed 28 redundant places. [2025-04-13 20:44:44,072 INFO L231 Difference]: Finished difference. Result has 489 places, 535 transitions, 9254 flow [2025-04-13 20:44:44,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8241, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9254, PETRI_PLACES=489, PETRI_TRANSITIONS=535} [2025-04-13 20:44:44,072 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 465 predicate places. [2025-04-13 20:44:44,072 INFO L485 AbstractCegarLoop]: Abstraction has has 489 places, 535 transitions, 9254 flow [2025-04-13 20:44:44,072 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:44,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:44,073 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:44,079 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 20:44:44,273 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,SelfDestructingSolverStorable39 [2025-04-13 20:44:44,273 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 20:44:44,274 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:44,274 INFO L85 PathProgramCache]: Analyzing trace with hash 782338793, now seen corresponding path program 30 times [2025-04-13 20:44:44,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:44,274 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062079178] [2025-04-13 20:44:44,274 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:44:44,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:44,280 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:44,286 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:44,286 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:44:44,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:44,710 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 20:44:44,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:44,710 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062079178] [2025-04-13 20:44:44,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062079178] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:44,710 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830426588] [2025-04-13 20:44:44,710 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:44:44,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:44,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:44,712 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 20:44:44,712 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 20:44:44,755 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-13 20:44:44,791 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:44,791 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:44:44,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:44,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-13 20:44:44,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:44,990 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-04-13 20:44:45,141 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 20:44:45,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:45,485 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:45,486 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 34 treesize of output 26 [2025-04-13 20:44:45,742 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 20:44:45,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830426588] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:45,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:45,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 39 [2025-04-13 20:44:45,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751365951] [2025-04-13 20:44:45,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:45,743 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:44:45,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:45,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:44:45,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1438, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:44:45,744 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:45,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 535 transitions, 9254 flow. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:45,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:45,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:45,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:47,440 INFO L116 PetriNetUnfolderBase]: 1376/2572 cut-off events. [2025-04-13 20:44:47,440 INFO L117 PetriNetUnfolderBase]: For 114467/114467 co-relation queries the response was YES. [2025-04-13 20:44:47,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25716 conditions, 2572 events. 1376/2572 cut-off events. For 114467/114467 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 16521 event pairs, 153 based on Foata normal form. 9/2577 useless extension candidates. Maximal degree in co-relation 25550. Up to 2289 conditions per place. [2025-04-13 20:44:47,467 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 479 selfloop transitions, 89 changer transitions 41/609 dead transitions. [2025-04-13 20:44:47,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 609 transitions, 11358 flow [2025-04-13 20:44:47,467 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-04-13 20:44:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2025-04-13 20:44:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 235 transitions. [2025-04-13 20:44:47,468 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25405405405405407 [2025-04-13 20:44:47,468 INFO L175 Difference]: Start difference. First operand has 489 places, 535 transitions, 9254 flow. Second operand 37 states and 235 transitions. [2025-04-13 20:44:47,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 609 transitions, 11358 flow [2025-04-13 20:44:48,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 609 transitions, 10492 flow, removed 380 selfloop flow, removed 24 redundant places. [2025-04-13 20:44:48,011 INFO L231 Difference]: Finished difference. Result has 503 places, 526 transitions, 8678 flow [2025-04-13 20:44:48,011 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8502, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8678, PETRI_PLACES=503, PETRI_TRANSITIONS=526} [2025-04-13 20:44:48,011 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 479 predicate places. [2025-04-13 20:44:48,011 INFO L485 AbstractCegarLoop]: Abstraction has has 503 places, 526 transitions, 8678 flow [2025-04-13 20:44:48,012 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:48,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:48,012 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:48,018 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 20:44:48,212 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:48,212 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 20:44:48,213 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:48,213 INFO L85 PathProgramCache]: Analyzing trace with hash 687317273, now seen corresponding path program 31 times [2025-04-13 20:44:48,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:48,213 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725762957] [2025-04-13 20:44:48,213 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:44:48,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:48,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:44:48,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:48,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:44:48,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:48,596 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 20:44:48,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:48,596 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725762957] [2025-04-13 20:44:48,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725762957] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:48,596 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427795411] [2025-04-13 20:44:48,596 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:44:48,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:48,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:48,598 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 20:44:48,598 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 20:44:48,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:44:48,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:44:48,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:44:48,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:48,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 20:44:48,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:48,896 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-04-13 20:44:49,053 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 20:44:49,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:49,285 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:49,285 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 42 treesize of output 34 [2025-04-13 20:44:49,577 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 20:44:49,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427795411] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:49,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:49,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2025-04-13 20:44:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697984255] [2025-04-13 20:44:49,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:49,578 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-04-13 20:44:49,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:49,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-04-13 20:44:49,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2025-04-13 20:44:49,579 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:49,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 526 transitions, 8678 flow. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:49,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:49,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:49,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:51,414 INFO L116 PetriNetUnfolderBase]: 1344/2504 cut-off events. [2025-04-13 20:44:51,414 INFO L117 PetriNetUnfolderBase]: For 104071/104071 co-relation queries the response was YES. [2025-04-13 20:44:51,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24482 conditions, 2504 events. 1344/2504 cut-off events. For 104071/104071 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15956 event pairs, 155 based on Foata normal form. 3/2501 useless extension candidates. Maximal degree in co-relation 24314. Up to 2294 conditions per place. [2025-04-13 20:44:51,446 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 479 selfloop transitions, 79 changer transitions 23/581 dead transitions. [2025-04-13 20:44:51,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 581 transitions, 10304 flow [2025-04-13 20:44:51,447 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-13 20:44:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-13 20:44:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 191 transitions. [2025-04-13 20:44:51,447 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24645161290322581 [2025-04-13 20:44:51,447 INFO L175 Difference]: Start difference. First operand has 503 places, 526 transitions, 8678 flow. Second operand 31 states and 191 transitions. [2025-04-13 20:44:51,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 581 transitions, 10304 flow [2025-04-13 20:44:51,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 581 transitions, 9964 flow, removed 79 selfloop flow, removed 30 redundant places. [2025-04-13 20:44:51,941 INFO L231 Difference]: Finished difference. Result has 491 places, 521 transitions, 8533 flow [2025-04-13 20:44:51,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8342, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8533, PETRI_PLACES=491, PETRI_TRANSITIONS=521} [2025-04-13 20:44:51,941 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 467 predicate places. [2025-04-13 20:44:51,941 INFO L485 AbstractCegarLoop]: Abstraction has has 491 places, 521 transitions, 8533 flow [2025-04-13 20:44:51,942 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:51,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:51,942 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:51,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-04-13 20:44:52,142 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:52,142 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 20:44:52,143 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash 364159083, now seen corresponding path program 32 times [2025-04-13 20:44:52,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:52,143 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610737952] [2025-04-13 20:44:52,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:44:52,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:52,147 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:44:52,153 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:44:52,153 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:44:52,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:44:52,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:52,329 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610737952] [2025-04-13 20:44:52,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610737952] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:52,329 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525820306] [2025-04-13 20:44:52,329 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:44:52,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:52,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:52,331 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 20:44:52,341 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 20:44:52,385 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:44:52,413 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:44:52,413 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:44:52,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:52,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-13 20:44:52,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:44:52,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:52,831 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:52,831 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 32 treesize of output 24 [2025-04-13 20:44:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:44:52,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525820306] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:52,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:52,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 22 [2025-04-13 20:44:52,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010055113] [2025-04-13 20:44:52,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:52,910 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-13 20:44:52,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:52,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-13 20:44:52,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2025-04-13 20:44:52,911 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:52,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 521 transitions, 8533 flow. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 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 20:44:52,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:52,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:52,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:53,587 INFO L116 PetriNetUnfolderBase]: 1334/2480 cut-off events. [2025-04-13 20:44:53,587 INFO L117 PetriNetUnfolderBase]: For 96217/96217 co-relation queries the response was YES. [2025-04-13 20:44:53,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23860 conditions, 2480 events. 1334/2480 cut-off events. For 96217/96217 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 15692 event pairs, 148 based on Foata normal form. 2/2476 useless extension candidates. Maximal degree in co-relation 23694. Up to 2249 conditions per place. [2025-04-13 20:44:53,613 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 461 selfloop transitions, 81 changer transitions 8/550 dead transitions. [2025-04-13 20:44:53,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 550 transitions, 9944 flow [2025-04-13 20:44:53,613 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-13 20:44:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-13 20:44:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2025-04-13 20:44:53,613 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28 [2025-04-13 20:44:53,614 INFO L175 Difference]: Start difference. First operand has 491 places, 521 transitions, 8533 flow. Second operand 13 states and 91 transitions. [2025-04-13 20:44:53,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 550 transitions, 9944 flow [2025-04-13 20:44:54,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 550 transitions, 9675 flow, removed 57 selfloop flow, removed 26 redundant places. [2025-04-13 20:44:54,094 INFO L231 Difference]: Finished difference. Result has 472 places, 523 transitions, 8507 flow [2025-04-13 20:44:54,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8264, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8507, PETRI_PLACES=472, PETRI_TRANSITIONS=523} [2025-04-13 20:44:54,095 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 448 predicate places. [2025-04-13 20:44:54,095 INFO L485 AbstractCegarLoop]: Abstraction has has 472 places, 523 transitions, 8507 flow [2025-04-13 20:44:54,095 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 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 20:44:54,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:54,095 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:54,101 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 20:44:54,295 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,SelfDestructingSolverStorable42 [2025-04-13 20:44:54,296 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 20:44:54,296 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:54,296 INFO L85 PathProgramCache]: Analyzing trace with hash 359834583, now seen corresponding path program 33 times [2025-04-13 20:44:54,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:54,296 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920460813] [2025-04-13 20:44:54,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:44:54,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:54,300 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:44:54,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 22 statements. [2025-04-13 20:44:54,306 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:44:54,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:44:54,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:54,494 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920460813] [2025-04-13 20:44:54,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920460813] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:54,494 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779865520] [2025-04-13 20:44:54,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:44:54,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:54,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:54,496 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 20:44:54,496 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 20:44:54,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:44:54,556 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 22 statements. [2025-04-13 20:44:54,557 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:44:54,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:54,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-04-13 20:44:54,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:44:54,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:54,878 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:54,878 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 32 treesize of output 24 [2025-04-13 20:44:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:44:54,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779865520] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:54,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:54,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2025-04-13 20:44:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536864829] [2025-04-13 20:44:54,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:54,932 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-13 20:44:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:54,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-13 20:44:54,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2025-04-13 20:44:54,933 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:54,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 523 transitions, 8507 flow. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:54,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:54,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:54,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:55,723 INFO L116 PetriNetUnfolderBase]: 1338/2492 cut-off events. [2025-04-13 20:44:55,723 INFO L117 PetriNetUnfolderBase]: For 103064/103064 co-relation queries the response was YES. [2025-04-13 20:44:55,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24202 conditions, 2492 events. 1338/2492 cut-off events. For 103064/103064 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15825 event pairs, 151 based on Foata normal form. 2/2488 useless extension candidates. Maximal degree in co-relation 24036. Up to 2208 conditions per place. [2025-04-13 20:44:55,755 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 459 selfloop transitions, 83 changer transitions 9/551 dead transitions. [2025-04-13 20:44:55,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 551 transitions, 9972 flow [2025-04-13 20:44:55,756 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-13 20:44:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-13 20:44:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 87 transitions. [2025-04-13 20:44:55,756 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.31636363636363635 [2025-04-13 20:44:55,756 INFO L175 Difference]: Start difference. First operand has 472 places, 523 transitions, 8507 flow. Second operand 11 states and 87 transitions. [2025-04-13 20:44:55,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 551 transitions, 9972 flow [2025-04-13 20:44:56,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 551 transitions, 9803 flow, removed 21 selfloop flow, removed 10 redundant places. [2025-04-13 20:44:56,313 INFO L231 Difference]: Finished difference. Result has 472 places, 523 transitions, 8564 flow [2025-04-13 20:44:56,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8338, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8564, PETRI_PLACES=472, PETRI_TRANSITIONS=523} [2025-04-13 20:44:56,313 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 448 predicate places. [2025-04-13 20:44:56,313 INFO L485 AbstractCegarLoop]: Abstraction has has 472 places, 523 transitions, 8564 flow [2025-04-13 20:44:56,314 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:56,314 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:56,314 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:56,320 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 20:44:56,514 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:56,514 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 20:44:56,515 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:56,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1453926171, now seen corresponding path program 34 times [2025-04-13 20:44:56,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:56,515 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561792823] [2025-04-13 20:44:56,515 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:44:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:56,519 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:44:56,523 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:44:56,523 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:44:56,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:44:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:56,688 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561792823] [2025-04-13 20:44:56,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561792823] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:56,688 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294326088] [2025-04-13 20:44:56,688 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:44:56,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:56,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:56,689 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 20:44:56,691 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 20:44:56,736 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:44:56,749 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:44:56,749 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:44:56,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:56,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-04-13 20:44:56,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:56,948 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 20:44:56,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:57,280 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:57,281 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 32 treesize of output 24 [2025-04-13 20:44:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:44:57,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294326088] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:57,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:57,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 27 [2025-04-13 20:44:57,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101609723] [2025-04-13 20:44:57,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:57,344 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-13 20:44:57,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:57,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-13 20:44:57,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2025-04-13 20:44:57,345 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:57,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 523 transitions, 8564 flow. Second operand has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:57,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:57,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:57,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:44:58,052 INFO L116 PetriNetUnfolderBase]: 1328/2475 cut-off events. [2025-04-13 20:44:58,053 INFO L117 PetriNetUnfolderBase]: For 106615/106615 co-relation queries the response was YES. [2025-04-13 20:44:58,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24157 conditions, 2475 events. 1328/2475 cut-off events. For 106615/106615 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15667 event pairs, 158 based on Foata normal form. 2/2471 useless extension candidates. Maximal degree in co-relation 23992. Up to 2299 conditions per place. [2025-04-13 20:44:58,085 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 488 selfloop transitions, 56 changer transitions 6/550 dead transitions. [2025-04-13 20:44:58,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 550 transitions, 10054 flow [2025-04-13 20:44:58,085 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 20:44:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 20:44:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2025-04-13 20:44:58,085 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29333333333333333 [2025-04-13 20:44:58,085 INFO L175 Difference]: Start difference. First operand has 472 places, 523 transitions, 8564 flow. Second operand 12 states and 88 transitions. [2025-04-13 20:44:58,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 550 transitions, 10054 flow [2025-04-13 20:44:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 550 transitions, 9818 flow, removed 40 selfloop flow, removed 9 redundant places. [2025-04-13 20:44:58,689 INFO L231 Difference]: Finished difference. Result has 476 places, 525 transitions, 8563 flow [2025-04-13 20:44:58,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8328, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8563, PETRI_PLACES=476, PETRI_TRANSITIONS=525} [2025-04-13 20:44:58,690 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 452 predicate places. [2025-04-13 20:44:58,690 INFO L485 AbstractCegarLoop]: Abstraction has has 476 places, 525 transitions, 8563 flow [2025-04-13 20:44:58,690 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:58,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:44:58,690 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:44:58,696 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 20:44:58,890 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:58,891 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 20:44:58,891 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:44:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1424651443, now seen corresponding path program 35 times [2025-04-13 20:44:58,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:44:58,892 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997650268] [2025-04-13 20:44:58,892 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:44:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:44:58,895 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:44:58,904 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:44:58,905 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:44:58,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:59,291 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 20:44:59,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:44:59,291 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997650268] [2025-04-13 20:44:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997650268] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:44:59,291 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74622862] [2025-04-13 20:44:59,291 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:44:59,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:44:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:44:59,293 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 20:44:59,293 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 20:44:59,339 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:44:59,353 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:44:59,354 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:44:59,354 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:44:59,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-13 20:44:59,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:44:59,561 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 20:44:59,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:44:59,860 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:44:59,860 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 32 treesize of output 24 [2025-04-13 20:44:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:44:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74622862] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:44:59,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:44:59,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 31 [2025-04-13 20:44:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556687101] [2025-04-13 20:44:59,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:44:59,927 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-04-13 20:44:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:44:59,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-04-13 20:44:59,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2025-04-13 20:44:59,927 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:44:59,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 525 transitions, 8563 flow. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:44:59,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:44:59,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:44:59,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:00,646 INFO L116 PetriNetUnfolderBase]: 1316/2455 cut-off events. [2025-04-13 20:45:00,646 INFO L117 PetriNetUnfolderBase]: For 100261/100261 co-relation queries the response was YES. [2025-04-13 20:45:00,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23633 conditions, 2455 events. 1316/2455 cut-off events. For 100261/100261 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15541 event pairs, 163 based on Foata normal form. 1/2450 useless extension candidates. Maximal degree in co-relation 23466. Up to 2349 conditions per place. [2025-04-13 20:45:00,678 INFO L140 encePairwiseOnDemand]: 12/25 looper letters, 487 selfloop transitions, 45 changer transitions 12/544 dead transitions. [2025-04-13 20:45:00,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 544 transitions, 9748 flow [2025-04-13 20:45:00,679 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-13 20:45:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-13 20:45:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 92 transitions. [2025-04-13 20:45:00,679 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24533333333333332 [2025-04-13 20:45:00,679 INFO L175 Difference]: Start difference. First operand has 476 places, 525 transitions, 8563 flow. Second operand 15 states and 92 transitions. [2025-04-13 20:45:00,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 544 transitions, 9748 flow [2025-04-13 20:45:01,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 544 transitions, 9589 flow, removed 36 selfloop flow, removed 8 redundant places. [2025-04-13 20:45:01,220 INFO L231 Difference]: Finished difference. Result has 483 places, 521 transitions, 8452 flow [2025-04-13 20:45:01,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8404, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8452, PETRI_PLACES=483, PETRI_TRANSITIONS=521} [2025-04-13 20:45:01,221 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 459 predicate places. [2025-04-13 20:45:01,221 INFO L485 AbstractCegarLoop]: Abstraction has has 483 places, 521 transitions, 8452 flow [2025-04-13 20:45:01,221 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:01,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:01,221 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:01,227 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 20:45:01,421 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,SelfDestructingSolverStorable45 [2025-04-13 20:45:01,421 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 20:45:01,422 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:01,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1715992149, now seen corresponding path program 36 times [2025-04-13 20:45:01,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:01,422 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530399233] [2025-04-13 20:45:01,422 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:45:01,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:01,426 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:45:01,432 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:01,432 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:45:01,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:01,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:01,620 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530399233] [2025-04-13 20:45:01,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530399233] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:01,620 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593376736] [2025-04-13 20:45:01,620 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:45:01,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:01,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:01,622 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 20:45:01,623 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 20:45:01,670 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:45:01,711 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:01,711 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:45:01,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:01,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-13 20:45:01,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:01,850 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 20:45:01,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:02,115 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:45:02,115 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 43 treesize of output 35 [2025-04-13 20:45:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:02,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593376736] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:45:02,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:45:02,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 22 [2025-04-13 20:45:02,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873937847] [2025-04-13 20:45:02,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:45:02,201 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-13 20:45:02,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:02,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-13 20:45:02,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2025-04-13 20:45:02,201 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:02,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 521 transitions, 8452 flow. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 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 20:45:02,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:02,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:02,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:02,894 INFO L116 PetriNetUnfolderBase]: 1310/2441 cut-off events. [2025-04-13 20:45:02,895 INFO L117 PetriNetUnfolderBase]: For 98766/98766 co-relation queries the response was YES. [2025-04-13 20:45:02,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23469 conditions, 2441 events. 1310/2441 cut-off events. For 98766/98766 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15453 event pairs, 161 based on Foata normal form. 1/2436 useless extension candidates. Maximal degree in co-relation 23301. Up to 2300 conditions per place. [2025-04-13 20:45:02,928 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 479 selfloop transitions, 50 changer transitions 13/542 dead transitions. [2025-04-13 20:45:02,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 542 transitions, 9695 flow [2025-04-13 20:45:02,929 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-13 20:45:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-13 20:45:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 88 transitions. [2025-04-13 20:45:02,929 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27076923076923076 [2025-04-13 20:45:02,929 INFO L175 Difference]: Start difference. First operand has 483 places, 521 transitions, 8452 flow. Second operand 13 states and 88 transitions. [2025-04-13 20:45:02,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 542 transitions, 9695 flow [2025-04-13 20:45:03,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 542 transitions, 9563 flow, removed 21 selfloop flow, removed 14 redundant places. [2025-04-13 20:45:03,443 INFO L231 Difference]: Finished difference. Result has 476 places, 515 transitions, 8335 flow [2025-04-13 20:45:03,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8326, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8335, PETRI_PLACES=476, PETRI_TRANSITIONS=515} [2025-04-13 20:45:03,444 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 452 predicate places. [2025-04-13 20:45:03,444 INFO L485 AbstractCegarLoop]: Abstraction has has 476 places, 515 transitions, 8335 flow [2025-04-13 20:45:03,444 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 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 20:45:03,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:03,444 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:03,451 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 20:45:03,644 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-04-13 20:45:03,645 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 20:45:03,645 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash -137900773, now seen corresponding path program 37 times [2025-04-13 20:45:03,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:03,645 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312447663] [2025-04-13 20:45:03,645 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:45:03,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:03,649 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-13 20:45:03,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:03,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:45:03,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:04,135 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 20:45:04,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:04,135 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312447663] [2025-04-13 20:45:04,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312447663] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:04,136 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013082915] [2025-04-13 20:45:04,136 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:45:04,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:04,138 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 20:45:04,139 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 20:45:04,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-13 20:45:04,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:04,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:45:04,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:04,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-13 20:45:04,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:04,455 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 20:45:04,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:04,716 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:45:04,716 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 34 treesize of output 26 [2025-04-13 20:45:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:04,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013082915] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:04,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:45:04,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14, 11] total 33 [2025-04-13 20:45:04,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536697581] [2025-04-13 20:45:04,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:45:04,817 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-13 20:45:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:04,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-13 20:45:04,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2025-04-13 20:45:04,817 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:04,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 515 transitions, 8335 flow. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:04,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:04,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:04,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:05,446 INFO L116 PetriNetUnfolderBase]: 1302/2425 cut-off events. [2025-04-13 20:45:05,447 INFO L117 PetriNetUnfolderBase]: For 97862/97862 co-relation queries the response was YES. [2025-04-13 20:45:05,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23242 conditions, 2425 events. 1302/2425 cut-off events. For 97862/97862 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 15255 event pairs, 163 based on Foata normal form. 1/2420 useless extension candidates. Maximal degree in co-relation 23076. Up to 2345 conditions per place. [2025-04-13 20:45:05,480 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 499 selfloop transitions, 23 changer transitions 11/533 dead transitions. [2025-04-13 20:45:05,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 533 transitions, 9523 flow [2025-04-13 20:45:05,481 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-13 20:45:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-13 20:45:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 70 transitions. [2025-04-13 20:45:05,481 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28 [2025-04-13 20:45:05,481 INFO L175 Difference]: Start difference. First operand has 476 places, 515 transitions, 8335 flow. Second operand 10 states and 70 transitions. [2025-04-13 20:45:05,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 533 transitions, 9523 flow [2025-04-13 20:45:05,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 533 transitions, 9327 flow, removed 23 selfloop flow, removed 17 redundant places. [2025-04-13 20:45:05,977 INFO L231 Difference]: Finished difference. Result has 468 places, 513 transitions, 8169 flow [2025-04-13 20:45:05,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8145, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8169, PETRI_PLACES=468, PETRI_TRANSITIONS=513} [2025-04-13 20:45:05,978 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 444 predicate places. [2025-04-13 20:45:05,978 INFO L485 AbstractCegarLoop]: Abstraction has has 468 places, 513 transitions, 8169 flow [2025-04-13 20:45:05,978 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:05,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:05,978 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:05,984 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 20:45:06,178 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,SelfDestructingSolverStorable47 [2025-04-13 20:45:06,179 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 20:45:06,179 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:06,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1927031663, now seen corresponding path program 38 times [2025-04-13 20:45:06,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:06,179 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651096588] [2025-04-13 20:45:06,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:45:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:06,183 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:45:06,189 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:06,190 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:45:06,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:06,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:06,370 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651096588] [2025-04-13 20:45:06,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651096588] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:06,370 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466977988] [2025-04-13 20:45:06,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:45:06,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:06,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:06,372 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 20:45:06,373 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 20:45:06,421 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:45:06,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:06,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:45:06,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:06,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-13 20:45:06,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:06,579 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 20:45:06,579 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:06,823 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:45:06,823 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 45 treesize of output 37 [2025-04-13 20:45:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:06,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466977988] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:45:06,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:45:06,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 8] total 22 [2025-04-13 20:45:06,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295274237] [2025-04-13 20:45:06,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:45:06,942 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-13 20:45:06,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:06,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-13 20:45:06,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2025-04-13 20:45:06,942 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:06,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 513 transitions, 8169 flow. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 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 20:45:06,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:06,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:06,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:07,541 INFO L116 PetriNetUnfolderBase]: 1296/2411 cut-off events. [2025-04-13 20:45:07,541 INFO L117 PetriNetUnfolderBase]: For 94507/94507 co-relation queries the response was YES. [2025-04-13 20:45:07,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22873 conditions, 2411 events. 1296/2411 cut-off events. For 94507/94507 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15121 event pairs, 162 based on Foata normal form. 1/2406 useless extension candidates. Maximal degree in co-relation 22710. Up to 2296 conditions per place. [2025-04-13 20:45:07,573 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 486 selfloop transitions, 34 changer transitions 12/532 dead transitions. [2025-04-13 20:45:07,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 532 transitions, 9379 flow [2025-04-13 20:45:07,573 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-13 20:45:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-13 20:45:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 83 transitions. [2025-04-13 20:45:07,574 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2553846153846154 [2025-04-13 20:45:07,574 INFO L175 Difference]: Start difference. First operand has 468 places, 513 transitions, 8169 flow. Second operand 13 states and 83 transitions. [2025-04-13 20:45:07,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 532 transitions, 9379 flow [2025-04-13 20:45:08,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 532 transitions, 9321 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-04-13 20:45:08,087 INFO L231 Difference]: Finished difference. Result has 470 places, 508 transitions, 8096 flow [2025-04-13 20:45:08,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8113, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8096, PETRI_PLACES=470, PETRI_TRANSITIONS=508} [2025-04-13 20:45:08,088 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 446 predicate places. [2025-04-13 20:45:08,088 INFO L485 AbstractCegarLoop]: Abstraction has has 470 places, 508 transitions, 8096 flow [2025-04-13 20:45:08,088 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 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 20:45:08,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:08,088 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:08,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2025-04-13 20:45:08,288 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:08,289 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 20:45:08,289 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:08,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1199666441, now seen corresponding path program 39 times [2025-04-13 20:45:08,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:08,289 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425512311] [2025-04-13 20:45:08,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:45:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:08,293 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:45:08,296 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 19 of 22 statements. [2025-04-13 20:45:08,297 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:45:08,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:08,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:08,453 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425512311] [2025-04-13 20:45:08,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425512311] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:45:08,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:45:08,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-04-13 20:45:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563000762] [2025-04-13 20:45:08,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:45:08,453 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-13 20:45:08,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:08,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-13 20:45:08,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2025-04-13 20:45:08,453 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:08,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 508 transitions, 8096 flow. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:08,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:08,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:08,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:08,926 INFO L116 PetriNetUnfolderBase]: 1285/2386 cut-off events. [2025-04-13 20:45:08,926 INFO L117 PetriNetUnfolderBase]: For 94347/94347 co-relation queries the response was YES. [2025-04-13 20:45:08,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22689 conditions, 2386 events. 1285/2386 cut-off events. For 94347/94347 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14905 event pairs, 164 based on Foata normal form. 1/2381 useless extension candidates. Maximal degree in co-relation 22526. Up to 2268 conditions per place. [2025-04-13 20:45:08,956 INFO L140 encePairwiseOnDemand]: 15/25 looper letters, 470 selfloop transitions, 45 changer transitions 11/526 dead transitions. [2025-04-13 20:45:08,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 526 transitions, 9259 flow [2025-04-13 20:45:08,956 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 20:45:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 20:45:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2025-04-13 20:45:08,956 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.30666666666666664 [2025-04-13 20:45:08,956 INFO L175 Difference]: Start difference. First operand has 470 places, 508 transitions, 8096 flow. Second operand 9 states and 69 transitions. [2025-04-13 20:45:08,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 526 transitions, 9259 flow [2025-04-13 20:45:09,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 526 transitions, 9126 flow, removed 29 selfloop flow, removed 13 redundant places. [2025-04-13 20:45:09,457 INFO L231 Difference]: Finished difference. Result has 465 places, 505 transitions, 8027 flow [2025-04-13 20:45:09,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8027, PETRI_PLACES=465, PETRI_TRANSITIONS=505} [2025-04-13 20:45:09,457 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 441 predicate places. [2025-04-13 20:45:09,457 INFO L485 AbstractCegarLoop]: Abstraction has has 465 places, 505 transitions, 8027 flow [2025-04-13 20:45:09,457 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:09,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:09,458 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:09,458 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2025-04-13 20:45:09,458 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 20:45:09,458 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash 661810863, now seen corresponding path program 40 times [2025-04-13 20:45:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:09,458 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649305516] [2025-04-13 20:45:09,458 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:45:09,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:09,462 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:45:09,466 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:09,466 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:45:09,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:09,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:09,636 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649305516] [2025-04-13 20:45:09,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649305516] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:09,636 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225332423] [2025-04-13 20:45:09,636 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:45:09,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:09,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:09,639 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 20:45:09,642 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 20:45:09,697 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-04-13 20:45:09,728 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:09,728 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:45:09,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:09,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-04-13 20:45:09,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:09,914 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 20:45:09,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:10,181 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:45:10,181 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 34 treesize of output 26 [2025-04-13 20:45:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:10,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225332423] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:45:10,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:45:10,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 27 [2025-04-13 20:45:10,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007721418] [2025-04-13 20:45:10,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:45:10,275 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-04-13 20:45:10,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:10,276 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-04-13 20:45:10,276 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2025-04-13 20:45:10,276 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:10,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 505 transitions, 8027 flow. Second operand has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:10,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:10,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:10,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:10,882 INFO L116 PetriNetUnfolderBase]: 1279/2372 cut-off events. [2025-04-13 20:45:10,882 INFO L117 PetriNetUnfolderBase]: For 94179/94179 co-relation queries the response was YES. [2025-04-13 20:45:10,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22529 conditions, 2372 events. 1279/2372 cut-off events. For 94179/94179 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14759 event pairs, 143 based on Foata normal form. 1/2367 useless extension candidates. Maximal degree in co-relation 22366. Up to 2095 conditions per place. [2025-04-13 20:45:10,913 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 420 selfloop transitions, 102 changer transitions 6/528 dead transitions. [2025-04-13 20:45:10,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 528 transitions, 9253 flow [2025-04-13 20:45:10,914 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-13 20:45:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-13 20:45:10,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 82 transitions. [2025-04-13 20:45:10,914 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.29818181818181816 [2025-04-13 20:45:10,914 INFO L175 Difference]: Start difference. First operand has 465 places, 505 transitions, 8027 flow. Second operand 11 states and 82 transitions. [2025-04-13 20:45:10,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 528 transitions, 9253 flow [2025-04-13 20:45:11,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 528 transitions, 9139 flow, removed 12 selfloop flow, removed 9 redundant places. [2025-04-13 20:45:11,375 INFO L231 Difference]: Finished difference. Result has 463 places, 504 transitions, 8104 flow [2025-04-13 20:45:11,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7921, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8104, PETRI_PLACES=463, PETRI_TRANSITIONS=504} [2025-04-13 20:45:11,375 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 439 predicate places. [2025-04-13 20:45:11,375 INFO L485 AbstractCegarLoop]: Abstraction has has 463 places, 504 transitions, 8104 flow [2025-04-13 20:45:11,376 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:11,376 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:11,376 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:11,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2025-04-13 20:45:11,576 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:11,576 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 20:45:11,577 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1082954339, now seen corresponding path program 41 times [2025-04-13 20:45:11,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:11,577 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446743646] [2025-04-13 20:45:11,577 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:45:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:11,582 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:45:11,590 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:11,590 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:45:11,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:12,055 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 20:45:12,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:12,055 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446743646] [2025-04-13 20:45:12,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446743646] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:12,055 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298871085] [2025-04-13 20:45:12,055 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:45:12,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:12,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:12,057 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 20:45:12,058 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 20:45:12,109 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-04-13 20:45:12,123 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:45:12,123 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:45:12,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:12,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-13 20:45:12,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:12,333 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 20:45:12,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:12,631 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:45:12,631 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 34 treesize of output 26 [2025-04-13 20:45:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:12,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298871085] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:12,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:45:12,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14, 11] total 32 [2025-04-13 20:45:12,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876010672] [2025-04-13 20:45:12,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:45:12,725 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-13 20:45:12,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:12,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-13 20:45:12,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2025-04-13 20:45:12,726 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:12,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 504 transitions, 8104 flow. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:12,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:12,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:12,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:13,317 INFO L116 PetriNetUnfolderBase]: 1287/2390 cut-off events. [2025-04-13 20:45:13,318 INFO L117 PetriNetUnfolderBase]: For 96194/96194 co-relation queries the response was YES. [2025-04-13 20:45:13,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22865 conditions, 2390 events. 1287/2390 cut-off events. For 96194/96194 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14845 event pairs, 162 based on Foata normal form. 1/2385 useless extension candidates. Maximal degree in co-relation 22704. Up to 2146 conditions per place. [2025-04-13 20:45:13,344 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 454 selfloop transitions, 66 changer transitions 11/531 dead transitions. [2025-04-13 20:45:13,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 531 transitions, 9526 flow [2025-04-13 20:45:13,344 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 20:45:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 20:45:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2025-04-13 20:45:13,344 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2025-04-13 20:45:13,344 INFO L175 Difference]: Start difference. First operand has 463 places, 504 transitions, 8104 flow. Second operand 9 states and 78 transitions. [2025-04-13 20:45:13,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 531 transitions, 9526 flow [2025-04-13 20:45:13,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 531 transitions, 9299 flow, removed 3 selfloop flow, removed 12 redundant places. [2025-04-13 20:45:13,824 INFO L231 Difference]: Finished difference. Result has 459 places, 502 transitions, 7987 flow [2025-04-13 20:45:13,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7877, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7987, PETRI_PLACES=459, PETRI_TRANSITIONS=502} [2025-04-13 20:45:13,825 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 435 predicate places. [2025-04-13 20:45:13,825 INFO L485 AbstractCegarLoop]: Abstraction has has 459 places, 502 transitions, 7987 flow [2025-04-13 20:45:13,826 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:13,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:13,826 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:13,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2025-04-13 20:45:14,026 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,SelfDestructingSolverStorable51 [2025-04-13 20:45:14,026 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 20:45:14,027 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1992079619, now seen corresponding path program 1 times [2025-04-13 20:45:14,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:14,027 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880429255] [2025-04-13 20:45:14,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:45:14,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:14,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-13 20:45:14,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 20:45:14,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:45:14,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:45:14,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:14,075 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880429255] [2025-04-13 20:45:14,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880429255] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:14,075 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789056610] [2025-04-13 20:45:14,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:45:14,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:14,077 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 20:45:14,078 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 20:45:14,127 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-13 20:45:14,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 20:45:14,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:45:14,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:14,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 20:45:14,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:45:14,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:45:14,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789056610] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:45:14,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:45:14,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-04-13 20:45:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912343447] [2025-04-13 20:45:14,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:45:14,237 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-13 20:45:14,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:14,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-13 20:45:14,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-04-13 20:45:14,237 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:14,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 502 transitions, 7987 flow. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:14,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:14,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:14,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:14,630 INFO L116 PetriNetUnfolderBase]: 1003/1917 cut-off events. [2025-04-13 20:45:14,631 INFO L117 PetriNetUnfolderBase]: For 113277/113277 co-relation queries the response was YES. [2025-04-13 20:45:14,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20721 conditions, 1917 events. 1003/1917 cut-off events. For 113277/113277 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11491 event pairs, 353 based on Foata normal form. 110/2021 useless extension candidates. Maximal degree in co-relation 20562. Up to 977 conditions per place. [2025-04-13 20:45:14,654 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 246 selfloop transitions, 13 changer transitions 143/402 dead transitions. [2025-04-13 20:45:14,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 402 transitions, 7889 flow [2025-04-13 20:45:14,655 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:45:14,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:45:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2025-04-13 20:45:14,655 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36 [2025-04-13 20:45:14,655 INFO L175 Difference]: Start difference. First operand has 459 places, 502 transitions, 7987 flow. Second operand 8 states and 72 transitions. [2025-04-13 20:45:14,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 402 transitions, 7889 flow [2025-04-13 20:45:15,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 402 transitions, 7274 flow, removed 71 selfloop flow, removed 51 redundant places. [2025-04-13 20:45:15,042 INFO L231 Difference]: Finished difference. Result has 379 places, 242 transitions, 3883 flow [2025-04-13 20:45:15,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6125, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3883, PETRI_PLACES=379, PETRI_TRANSITIONS=242} [2025-04-13 20:45:15,043 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 355 predicate places. [2025-04-13 20:45:15,043 INFO L485 AbstractCegarLoop]: Abstraction has has 379 places, 242 transitions, 3883 flow [2025-04-13 20:45:15,043 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:15,043 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:15,043 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:15,049 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 20:45:15,243 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,SelfDestructingSolverStorable52 [2025-04-13 20:45:15,244 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 20:45:15,244 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:15,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1674368867, now seen corresponding path program 42 times [2025-04-13 20:45:15,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:15,244 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561771481] [2025-04-13 20:45:15,244 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:45:15,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:15,248 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 3 equivalence classes. [2025-04-13 20:45:15,254 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 20:45:15,254 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:45:15,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-13 20:45:15,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:15,290 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561771481] [2025-04-13 20:45:15,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561771481] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:45:15,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:45:15,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 20:45:15,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32593258] [2025-04-13 20:45:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:45:15,290 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:45:15,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:15,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:45:15,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-04-13 20:45:15,291 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:15,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 242 transitions, 3883 flow. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 20:45:15,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:15,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:15,546 INFO L116 PetriNetUnfolderBase]: 803/1584 cut-off events. [2025-04-13 20:45:15,547 INFO L117 PetriNetUnfolderBase]: For 70647/70647 co-relation queries the response was YES. [2025-04-13 20:45:15,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15608 conditions, 1584 events. 803/1584 cut-off events. For 70647/70647 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9364 event pairs, 145 based on Foata normal form. 37/1621 useless extension candidates. Maximal degree in co-relation 15480. Up to 559 conditions per place. [2025-04-13 20:45:15,562 INFO L140 encePairwiseOnDemand]: 21/25 looper letters, 81 selfloop transitions, 22 changer transitions 173/276 dead transitions. [2025-04-13 20:45:15,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 276 transitions, 5032 flow [2025-04-13 20:45:15,562 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:45:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:45:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2025-04-13 20:45:15,563 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-04-13 20:45:15,563 INFO L175 Difference]: Start difference. First operand has 379 places, 242 transitions, 3883 flow. Second operand 5 states and 75 transitions. [2025-04-13 20:45:15,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 276 transitions, 5032 flow [2025-04-13 20:45:15,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 276 transitions, 4480 flow, removed 67 selfloop flow, removed 60 redundant places. [2025-04-13 20:45:15,718 INFO L231 Difference]: Finished difference. Result has 275 places, 65 transitions, 972 flow [2025-04-13 20:45:15,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3040, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=972, PETRI_PLACES=275, PETRI_TRANSITIONS=65} [2025-04-13 20:45:15,719 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 251 predicate places. [2025-04-13 20:45:15,719 INFO L485 AbstractCegarLoop]: Abstraction has has 275 places, 65 transitions, 972 flow [2025-04-13 20:45:15,719 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 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 20:45:15,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:15,719 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:15,719 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2025-04-13 20:45:15,719 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 20:45:15,719 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 544680635, now seen corresponding path program 2 times [2025-04-13 20:45:15,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:15,720 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565577683] [2025-04-13 20:45:15,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:45:15,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:15,724 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-13 20:45:15,728 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-13 20:45:15,729 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:45:15,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:15,866 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 20:45:15,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:15,866 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565577683] [2025-04-13 20:45:15,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565577683] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:15,866 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420739332] [2025-04-13 20:45:15,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:45:15,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:15,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:15,868 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 20:45:15,869 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 20:45:15,920 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-04-13 20:45:15,933 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-04-13 20:45:15,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:45:15,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:15,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-04-13 20:45:15,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 20:45:16,003 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:16,035 INFO L325 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-04-13 20:45:16,035 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 26 treesize of output 14 [2025-04-13 20:45:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:45:16,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420739332] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:45:16,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:45:16,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 20 [2025-04-13 20:45:16,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986103320] [2025-04-13 20:45:16,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:45:16,045 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-13 20:45:16,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:16,045 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-13 20:45:16,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2025-04-13 20:45:16,045 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:16,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 65 transitions, 972 flow. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 21 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 20:45:16,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:16,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:16,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:16,802 INFO L116 PetriNetUnfolderBase]: 984/1712 cut-off events. [2025-04-13 20:45:16,802 INFO L117 PetriNetUnfolderBase]: For 150554/150554 co-relation queries the response was YES. [2025-04-13 20:45:16,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19129 conditions, 1712 events. 984/1712 cut-off events. For 150554/150554 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8189 event pairs, 53 based on Foata normal form. 140/1852 useless extension candidates. Maximal degree in co-relation 19034. Up to 635 conditions per place. [2025-04-13 20:45:16,816 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 206 selfloop transitions, 57 changer transitions 8/271 dead transitions. [2025-04-13 20:45:16,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 271 transitions, 4913 flow [2025-04-13 20:45:16,817 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-13 20:45:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-13 20:45:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 256 transitions. [2025-04-13 20:45:16,817 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3657142857142857 [2025-04-13 20:45:16,817 INFO L175 Difference]: Start difference. First operand has 275 places, 65 transitions, 972 flow. Second operand 28 states and 256 transitions. [2025-04-13 20:45:16,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 271 transitions, 4913 flow [2025-04-13 20:45:16,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 271 transitions, 3011 flow, removed 811 selfloop flow, removed 55 redundant places. [2025-04-13 20:45:16,893 INFO L231 Difference]: Finished difference. Result has 138 places, 99 transitions, 1270 flow [2025-04-13 20:45:16,893 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1270, PETRI_PLACES=138, PETRI_TRANSITIONS=99} [2025-04-13 20:45:16,893 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 114 predicate places. [2025-04-13 20:45:16,893 INFO L485 AbstractCegarLoop]: Abstraction has has 138 places, 99 transitions, 1270 flow [2025-04-13 20:45:16,893 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 21 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 20:45:16,893 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:16,893 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:16,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2025-04-13 20:45:17,094 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,SelfDestructingSolverStorable54 [2025-04-13 20:45:17,094 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 20:45:17,094 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:17,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1003154077, now seen corresponding path program 3 times [2025-04-13 20:45:17,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:17,095 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674288907] [2025-04-13 20:45:17,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:45:17,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:17,099 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:45:17,108 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:45:17,108 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 20:45:17,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:45:17,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:17,706 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674288907] [2025-04-13 20:45:17,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674288907] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:17,706 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572590105] [2025-04-13 20:45:17,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:45:17,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:17,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:17,708 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 20:45:17,708 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 20:45:17,761 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:45:17,820 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:45:17,820 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-13 20:45:17,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:17,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-04-13 20:45:17,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:45:18,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:19,205 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:45:19,205 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 58 treesize of output 60 [2025-04-13 20:45:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:45:19,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572590105] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:45:19,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:45:19,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2025-04-13 20:45:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699979691] [2025-04-13 20:45:19,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:45:19,575 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-04-13 20:45:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:19,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-04-13 20:45:19,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2894, Unknown=0, NotChecked=0, Total=3192 [2025-04-13 20:45:19,576 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:19,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 99 transitions, 1270 flow. Second operand has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:19,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:19,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:19,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:25,565 INFO L116 PetriNetUnfolderBase]: 1371/2366 cut-off events. [2025-04-13 20:45:25,566 INFO L117 PetriNetUnfolderBase]: For 33103/33103 co-relation queries the response was YES. [2025-04-13 20:45:25,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16495 conditions, 2366 events. 1371/2366 cut-off events. For 33103/33103 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12297 event pairs, 207 based on Foata normal form. 5/2371 useless extension candidates. Maximal degree in co-relation 16431. Up to 1749 conditions per place. [2025-04-13 20:45:25,584 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 169 selfloop transitions, 192 changer transitions 8/369 dead transitions. [2025-04-13 20:45:25,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 369 transitions, 4652 flow [2025-04-13 20:45:25,585 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-04-13 20:45:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-04-13 20:45:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 368 transitions. [2025-04-13 20:45:25,586 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26285714285714284 [2025-04-13 20:45:25,586 INFO L175 Difference]: Start difference. First operand has 138 places, 99 transitions, 1270 flow. Second operand 56 states and 368 transitions. [2025-04-13 20:45:25,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 369 transitions, 4652 flow [2025-04-13 20:45:25,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 369 transitions, 4372 flow, removed 68 selfloop flow, removed 8 redundant places. [2025-04-13 20:45:25,651 INFO L231 Difference]: Finished difference. Result has 199 places, 264 transitions, 3820 flow [2025-04-13 20:45:25,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=3820, PETRI_PLACES=199, PETRI_TRANSITIONS=264} [2025-04-13 20:45:25,652 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 175 predicate places. [2025-04-13 20:45:25,652 INFO L485 AbstractCegarLoop]: Abstraction has has 199 places, 264 transitions, 3820 flow [2025-04-13 20:45:25,652 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:25,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:45:25,652 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:45:25,660 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 20:45:25,852 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:25,853 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 20:45:25,853 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:45:25,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1435139921, now seen corresponding path program 4 times [2025-04-13 20:45:25,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:45:25,853 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507062868] [2025-04-13 20:45:25,853 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:45:25,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:45:25,858 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:45:25,863 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:45:25,863 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:45:25,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:45:26,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:45:26,502 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507062868] [2025-04-13 20:45:26,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507062868] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:45:26,502 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926764769] [2025-04-13 20:45:26,502 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:45:26,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:45:26,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:45:26,504 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 20:45:26,504 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 20:45:26,556 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:45:26,571 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:45:26,571 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:45:26,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:45:26,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-04-13 20:45:26,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:45:27,237 INFO L325 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-04-13 20:45:27,237 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2025-04-13 20:45:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:45:27,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:45:28,011 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:45:28,011 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 68 treesize of output 71 [2025-04-13 20:45:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:45:28,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926764769] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:45:28,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:45:28,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2025-04-13 20:45:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152305269] [2025-04-13 20:45:28,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:45:28,720 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-04-13 20:45:28,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:45:28,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-04-13 20:45:28,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2916, Unknown=0, NotChecked=0, Total=3192 [2025-04-13 20:45:28,721 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:45:28,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 264 transitions, 3820 flow. Second operand has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:45:28,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:45:28,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:45:28,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:45:52,493 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:45:56,498 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:46:00,506 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 [] [2025-04-13 20:46:04,913 INFO L116 PetriNetUnfolderBase]: 3407/5746 cut-off events. [2025-04-13 20:46:04,913 INFO L117 PetriNetUnfolderBase]: For 116146/116146 co-relation queries the response was YES. [2025-04-13 20:46:04,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45995 conditions, 5746 events. 3407/5746 cut-off events. For 116146/116146 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 36100 event pairs, 164 based on Foata normal form. 3/5749 useless extension candidates. Maximal degree in co-relation 45915. Up to 2970 conditions per place. [2025-04-13 20:46:04,964 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 373 selfloop transitions, 582 changer transitions 12/967 dead transitions. [2025-04-13 20:46:04,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 967 transitions, 14959 flow [2025-04-13 20:46:04,965 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2025-04-13 20:46:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2025-04-13 20:46:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 700 transitions. [2025-04-13 20:46:04,966 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2025-04-13 20:46:04,966 INFO L175 Difference]: Start difference. First operand has 199 places, 264 transitions, 3820 flow. Second operand 108 states and 700 transitions. [2025-04-13 20:46:04,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 967 transitions, 14959 flow [2025-04-13 20:46:05,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 967 transitions, 13176 flow, removed 881 selfloop flow, removed 7 redundant places. [2025-04-13 20:46:05,429 INFO L231 Difference]: Finished difference. Result has 319 places, 759 transitions, 12315 flow [2025-04-13 20:46:05,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=12315, PETRI_PLACES=319, PETRI_TRANSITIONS=759} [2025-04-13 20:46:05,430 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 295 predicate places. [2025-04-13 20:46:05,430 INFO L485 AbstractCegarLoop]: Abstraction has has 319 places, 759 transitions, 12315 flow [2025-04-13 20:46:05,430 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:46:05,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:46:05,430 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:46:05,436 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 20:46:05,630 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:46:05,630 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 20:46:05,631 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:46:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1909356847, now seen corresponding path program 5 times [2025-04-13 20:46:05,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:46:05,631 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771525668] [2025-04-13 20:46:05,631 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:46:05,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:46:05,635 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:46:05,641 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:46:05,641 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:46:05,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:46:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:46:06,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:46:06,269 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771525668] [2025-04-13 20:46:06,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771525668] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:46:06,269 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30183591] [2025-04-13 20:46:06,269 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:46:06,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:46:06,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:46:06,271 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 20:46:06,271 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 20:46:06,328 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:46:06,352 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:46:06,352 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:46:06,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:46:06,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-04-13 20:46:06,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:46:07,119 INFO L325 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2025-04-13 20:46:07,120 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 19 [2025-04-13 20:46:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:46:07,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:46:08,167 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:46:08,167 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 57 treesize of output 60 [2025-04-13 20:46:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:46:08,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30183591] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:46:08,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:46:08,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2025-04-13 20:46:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040838812] [2025-04-13 20:46:08,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:46:08,703 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-04-13 20:46:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:46:08,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-04-13 20:46:08,704 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2787, Unknown=0, NotChecked=0, Total=3080 [2025-04-13 20:46:08,704 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:46:08,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 759 transitions, 12315 flow. Second operand has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:46:08,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:46:08,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:46:08,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:46:13,728 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 [0] [2025-04-13 20:46:19,582 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-04-13 20:46:23,995 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-04-13 20:46:27,945 INFO L116 PetriNetUnfolderBase]: 3552/6020 cut-off events. [2025-04-13 20:46:27,946 INFO L117 PetriNetUnfolderBase]: For 119788/119788 co-relation queries the response was YES. [2025-04-13 20:46:27,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51396 conditions, 6020 events. 3552/6020 cut-off events. For 119788/119788 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38407 event pairs, 386 based on Foata normal form. 3/5999 useless extension candidates. Maximal degree in co-relation 51295. Up to 5183 conditions per place. [2025-04-13 20:46:28,005 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 644 selfloop transitions, 354 changer transitions 9/1007 dead transitions. [2025-04-13 20:46:28,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1007 transitions, 17239 flow [2025-04-13 20:46:28,006 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-04-13 20:46:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2025-04-13 20:46:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 328 transitions. [2025-04-13 20:46:28,006 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2733333333333333 [2025-04-13 20:46:28,006 INFO L175 Difference]: Start difference. First operand has 319 places, 759 transitions, 12315 flow. Second operand 48 states and 328 transitions. [2025-04-13 20:46:28,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1007 transitions, 17239 flow [2025-04-13 20:46:29,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1007 transitions, 12562 flow, removed 2273 selfloop flow, removed 20 redundant places. [2025-04-13 20:46:29,280 INFO L231 Difference]: Finished difference. Result has 362 places, 900 transitions, 11326 flow [2025-04-13 20:46:29,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8426, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=11326, PETRI_PLACES=362, PETRI_TRANSITIONS=900} [2025-04-13 20:46:29,280 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 338 predicate places. [2025-04-13 20:46:29,280 INFO L485 AbstractCegarLoop]: Abstraction has has 362 places, 900 transitions, 11326 flow [2025-04-13 20:46:29,280 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:46:29,280 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:46:29,280 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:46:29,286 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 20:46:29,481 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,SelfDestructingSolverStorable57 [2025-04-13 20:46:29,481 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 20:46:29,481 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:46:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash 100625685, now seen corresponding path program 6 times [2025-04-13 20:46:29,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:46:29,482 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138429944] [2025-04-13 20:46:29,482 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:46:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:46:29,486 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:46:29,494 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:46:29,494 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:46:29,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:46:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:46:30,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:46:30,342 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138429944] [2025-04-13 20:46:30,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138429944] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:46:30,342 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944141496] [2025-04-13 20:46:30,342 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:46:30,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:46:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:46:30,344 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 20:46:30,345 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 20:46:30,401 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:46:30,456 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:46:30,456 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:46:30,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:46:30,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-04-13 20:46:30,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:46:31,215 INFO L325 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2025-04-13 20:46:31,215 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2025-04-13 20:46:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:46:31,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:46:32,434 INFO L325 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-04-13 20:46:32,435 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 57 treesize of output 52 [2025-04-13 20:46:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:46:32,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944141496] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:46:32,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:46:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-04-13 20:46:32,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628028703] [2025-04-13 20:46:32,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:46:32,916 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-04-13 20:46:32,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:46:32,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-04-13 20:46:32,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3058, Unknown=0, NotChecked=0, Total=3422 [2025-04-13 20:46:32,917 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:46:32,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 900 transitions, 11326 flow. Second operand has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:46:32,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:46:32,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:46:32,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:46:55,923 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 20:47:06,189 INFO L116 PetriNetUnfolderBase]: 4194/7228 cut-off events. [2025-04-13 20:47:06,189 INFO L117 PetriNetUnfolderBase]: For 61082/61082 co-relation queries the response was YES. [2025-04-13 20:47:06,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47917 conditions, 7228 events. 4194/7228 cut-off events. For 61082/61082 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 48902 event pairs, 242 based on Foata normal form. 7/7085 useless extension candidates. Maximal degree in co-relation 47802. Up to 5141 conditions per place. [2025-04-13 20:47:06,265 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 772 selfloop transitions, 700 changer transitions 36/1508 dead transitions. [2025-04-13 20:47:06,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1508 transitions, 20748 flow [2025-04-13 20:47:06,266 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2025-04-13 20:47:06,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2025-04-13 20:47:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 710 transitions. [2025-04-13 20:47:06,267 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26055045871559634 [2025-04-13 20:47:06,267 INFO L175 Difference]: Start difference. First operand has 362 places, 900 transitions, 11326 flow. Second operand 109 states and 710 transitions. [2025-04-13 20:47:06,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1508 transitions, 20748 flow [2025-04-13 20:47:06,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1508 transitions, 20233 flow, removed 226 selfloop flow, removed 12 redundant places. [2025-04-13 20:47:06,934 INFO L231 Difference]: Finished difference. Result has 496 places, 1312 transitions, 18983 flow [2025-04-13 20:47:06,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10897, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=18983, PETRI_PLACES=496, PETRI_TRANSITIONS=1312} [2025-04-13 20:47:06,934 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 472 predicate places. [2025-04-13 20:47:06,935 INFO L485 AbstractCegarLoop]: Abstraction has has 496 places, 1312 transitions, 18983 flow [2025-04-13 20:47:06,935 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:47:06,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:47:06,935 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:47:06,942 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 20:47:07,135 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2025-04-13 20:47:07,136 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 20:47:07,136 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:47:07,136 INFO L85 PathProgramCache]: Analyzing trace with hash 362821751, now seen corresponding path program 7 times [2025-04-13 20:47:07,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:47:07,136 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957246996] [2025-04-13 20:47:07,136 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:47:07,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:47:07,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:47:07,146 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:47:07,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:47:07,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:47:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:47:07,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:47:07,911 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957246996] [2025-04-13 20:47:07,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957246996] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:47:07,911 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120664969] [2025-04-13 20:47:07,911 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:47:07,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:47:07,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:47:07,913 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 20:47:07,915 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 20:47:07,985 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:47:08,008 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:47:08,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:47:08,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:47:08,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-04-13 20:47:08,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:47:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:47:08,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:47:09,665 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:47:09,665 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 66 treesize of output 68 [2025-04-13 20:47:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:47:10,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120664969] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:47:10,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:47:10,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 54 [2025-04-13 20:47:10,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659740376] [2025-04-13 20:47:10,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:47:10,191 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-04-13 20:47:10,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:47:10,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-04-13 20:47:10,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2838, Unknown=0, NotChecked=0, Total=3080 [2025-04-13 20:47:10,192 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:47:10,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1312 transitions, 18983 flow. Second operand has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:47:10,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:47:10,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:47:10,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:47:19,993 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 20:47:26,298 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 [] [2025-04-13 20:47:29,162 INFO L116 PetriNetUnfolderBase]: 4553/7846 cut-off events. [2025-04-13 20:47:29,163 INFO L117 PetriNetUnfolderBase]: For 79447/79447 co-relation queries the response was YES. [2025-04-13 20:47:29,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57543 conditions, 7846 events. 4553/7846 cut-off events. For 79447/79447 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 54135 event pairs, 165 based on Foata normal form. 5/7739 useless extension candidates. Maximal degree in co-relation 57389. Up to 5818 conditions per place. [2025-04-13 20:47:29,256 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 901 selfloop transitions, 775 changer transitions 30/1706 dead transitions. [2025-04-13 20:47:29,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 1706 transitions, 27254 flow [2025-04-13 20:47:29,257 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-04-13 20:47:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2025-04-13 20:47:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 484 transitions. [2025-04-13 20:47:29,258 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2765714285714286 [2025-04-13 20:47:29,258 INFO L175 Difference]: Start difference. First operand has 496 places, 1312 transitions, 18983 flow. Second operand 70 states and 484 transitions. [2025-04-13 20:47:29,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 1706 transitions, 27254 flow [2025-04-13 20:47:30,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 1706 transitions, 25203 flow, removed 967 selfloop flow, removed 20 redundant places. [2025-04-13 20:47:30,505 INFO L231 Difference]: Finished difference. Result has 567 places, 1550 transitions, 23587 flow [2025-04-13 20:47:30,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17236, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=23587, PETRI_PLACES=567, PETRI_TRANSITIONS=1550} [2025-04-13 20:47:30,506 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 543 predicate places. [2025-04-13 20:47:30,506 INFO L485 AbstractCegarLoop]: Abstraction has has 567 places, 1550 transitions, 23587 flow [2025-04-13 20:47:30,506 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:47:30,506 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:47:30,506 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:47:30,513 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 20:47:30,707 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,SelfDestructingSolverStorable59 [2025-04-13 20:47:30,707 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 20:47:30,708 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:47:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1499812169, now seen corresponding path program 8 times [2025-04-13 20:47:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:47:30,708 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495377929] [2025-04-13 20:47:30,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:47:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:47:30,713 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:47:30,719 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:47:30,720 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:47:30,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:47:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:47:31,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:47:31,450 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495377929] [2025-04-13 20:47:31,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495377929] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:47:31,450 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902122916] [2025-04-13 20:47:31,450 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:47:31,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:47:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:47:31,452 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 20:47:31,452 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 20:47:31,511 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:47:31,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:47:31,535 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:47:31,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:47:31,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-04-13 20:47:31,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:47:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:47:32,323 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:47:33,391 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:47:33,392 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 58 treesize of output 60 [2025-04-13 20:47:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:47:33,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902122916] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:47:33,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:47:33,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2025-04-13 20:47:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760095929] [2025-04-13 20:47:33,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:47:33,876 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-04-13 20:47:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:47:33,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-04-13 20:47:33,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2025-04-13 20:47:33,877 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:47:33,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1550 transitions, 23587 flow. Second operand has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:47:33,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:47:33,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:47:33,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:47:39,497 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 [] [2025-04-13 20:47:45,482 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:47:49,850 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:47:57,429 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:48:01,432 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:48:05,436 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:48:09,440 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:48:13,443 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:48:17,450 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:48:20,302 INFO L116 PetriNetUnfolderBase]: 4600/7942 cut-off events. [2025-04-13 20:48:20,303 INFO L117 PetriNetUnfolderBase]: For 83567/83567 co-relation queries the response was YES. [2025-04-13 20:48:20,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60601 conditions, 7942 events. 4600/7942 cut-off events. For 83567/83567 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 55128 event pairs, 237 based on Foata normal form. 3/7839 useless extension candidates. Maximal degree in co-relation 60421. Up to 6893 conditions per place. [2025-04-13 20:48:20,413 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1215 selfloop transitions, 483 changer transitions 9/1707 dead transitions. [2025-04-13 20:48:20,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1707 transitions, 28283 flow [2025-04-13 20:48:20,414 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2025-04-13 20:48:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2025-04-13 20:48:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 366 transitions. [2025-04-13 20:48:20,415 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2661818181818182 [2025-04-13 20:48:20,415 INFO L175 Difference]: Start difference. First operand has 567 places, 1550 transitions, 23587 flow. Second operand 55 states and 366 transitions. [2025-04-13 20:48:20,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1707 transitions, 28283 flow [2025-04-13 20:48:22,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 1707 transitions, 26973 flow, removed 567 selfloop flow, removed 25 redundant places. [2025-04-13 20:48:22,217 INFO L231 Difference]: Finished difference. Result has 607 places, 1592 transitions, 24475 flow [2025-04-13 20:48:22,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=22302, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=24475, PETRI_PLACES=607, PETRI_TRANSITIONS=1592} [2025-04-13 20:48:22,219 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 583 predicate places. [2025-04-13 20:48:22,219 INFO L485 AbstractCegarLoop]: Abstraction has has 607 places, 1592 transitions, 24475 flow [2025-04-13 20:48:22,219 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:48:22,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:48:22,219 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:48:22,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2025-04-13 20:48:22,420 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:48:22,420 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 20:48:22,421 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:48:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash -777455569, now seen corresponding path program 9 times [2025-04-13 20:48:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:48:22,421 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234522000] [2025-04-13 20:48:22,421 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:48:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:48:22,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:48:22,439 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:48:22,439 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:48:22,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:48:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:48:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:48:22,808 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234522000] [2025-04-13 20:48:22,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234522000] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:48:22,808 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276633338] [2025-04-13 20:48:22,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:48:22,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:48:22,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:48:22,810 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 20:48:22,810 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 20:48:22,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:48:22,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:48:22,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:48:22,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:48:22,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-04-13 20:48:22,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:48:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:48:23,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:48:23,910 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:48:23,911 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 69 treesize of output 63 [2025-04-13 20:48:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:48:24,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276633338] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:48:24,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:48:24,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2025-04-13 20:48:24,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698084375] [2025-04-13 20:48:24,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:48:24,022 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-04-13 20:48:24,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:48:24,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-04-13 20:48:24,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2025-04-13 20:48:24,023 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:48:24,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 1592 transitions, 24475 flow. Second operand has 36 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 36 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 20:48:24,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:48:24,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:48:24,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:48:32,411 INFO L116 PetriNetUnfolderBase]: 4653/8063 cut-off events. [2025-04-13 20:48:32,412 INFO L117 PetriNetUnfolderBase]: For 85763/85763 co-relation queries the response was YES. [2025-04-13 20:48:32,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62000 conditions, 8063 events. 4653/8063 cut-off events. For 85763/85763 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 56206 event pairs, 272 based on Foata normal form. 4/7951 useless extension candidates. Maximal degree in co-relation 61812. Up to 7065 conditions per place. [2025-04-13 20:48:32,528 INFO L140 encePairwiseOnDemand]: 14/25 looper letters, 1544 selfloop transitions, 147 changer transitions 11/1702 dead transitions. [2025-04-13 20:48:32,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1702 transitions, 29136 flow [2025-04-13 20:48:32,528 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 20:48:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-13 20:48:32,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 122 transitions. [2025-04-13 20:48:32,529 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.305 [2025-04-13 20:48:32,529 INFO L175 Difference]: Start difference. First operand has 607 places, 1592 transitions, 24475 flow. Second operand 16 states and 122 transitions. [2025-04-13 20:48:32,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1702 transitions, 29136 flow [2025-04-13 20:48:34,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 1702 transitions, 28521 flow, removed 91 selfloop flow, removed 29 redundant places. [2025-04-13 20:48:34,397 INFO L231 Difference]: Finished difference. Result has 597 places, 1603 transitions, 24504 flow [2025-04-13 20:48:34,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=23863, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24504, PETRI_PLACES=597, PETRI_TRANSITIONS=1603} [2025-04-13 20:48:34,399 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 573 predicate places. [2025-04-13 20:48:34,399 INFO L485 AbstractCegarLoop]: Abstraction has has 597 places, 1603 transitions, 24504 flow [2025-04-13 20:48:34,399 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 36 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 20:48:34,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:48:34,399 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:48:34,406 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 20:48:34,599 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:48:34,600 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 20:48:34,600 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:48:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1335938787, now seen corresponding path program 10 times [2025-04-13 20:48:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:48:34,601 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849005801] [2025-04-13 20:48:34,601 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:48:34,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:48:34,605 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:48:34,612 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:48:34,612 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:48:34,612 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:48:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:48:35,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:48:35,358 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849005801] [2025-04-13 20:48:35,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849005801] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:48:35,359 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260064876] [2025-04-13 20:48:35,359 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:48:35,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:48:35,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:48:35,361 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 20:48:35,361 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 20:48:35,420 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:48:35,444 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:48:35,444 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:48:35,444 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:48:35,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-04-13 20:48:35,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:48:36,137 INFO L325 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-04-13 20:48:36,138 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2025-04-13 20:48:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:48:36,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:48:37,140 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:48:37,140 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 68 treesize of output 71 [2025-04-13 20:48:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:48:37,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260064876] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:48:37,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:48:37,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2025-04-13 20:48:37,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035813334] [2025-04-13 20:48:37,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:48:37,823 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-04-13 20:48:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:48:37,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-04-13 20:48:37,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2934, Unknown=0, NotChecked=0, Total=3192 [2025-04-13 20:48:37,823 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:48:37,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1603 transitions, 24504 flow. Second operand has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:48:37,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:48:37,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:48:37,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:48:43,903 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:49:03,119 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:49:05,215 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:49:09,804 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:49:10,343 INFO L116 PetriNetUnfolderBase]: 5209/9133 cut-off events. [2025-04-13 20:49:10,343 INFO L117 PetriNetUnfolderBase]: For 123002/123002 co-relation queries the response was YES. [2025-04-13 20:49:10,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72034 conditions, 9133 events. 5209/9133 cut-off events. For 123002/123002 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 65539 event pairs, 216 based on Foata normal form. 7/9024 useless extension candidates. Maximal degree in co-relation 71843. Up to 3678 conditions per place. [2025-04-13 20:49:10,475 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 859 selfloop transitions, 1155 changer transitions 23/2037 dead transitions. [2025-04-13 20:49:10,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 2037 transitions, 34045 flow [2025-04-13 20:49:10,476 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2025-04-13 20:49:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2025-04-13 20:49:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 727 transitions. [2025-04-13 20:49:10,477 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26925925925925925 [2025-04-13 20:49:10,477 INFO L175 Difference]: Start difference. First operand has 597 places, 1603 transitions, 24504 flow. Second operand 108 states and 727 transitions. [2025-04-13 20:49:10,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 2037 transitions, 34045 flow [2025-04-13 20:49:12,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 2037 transitions, 33832 flow, removed 79 selfloop flow, removed 4 redundant places. [2025-04-13 20:49:12,695 INFO L231 Difference]: Finished difference. Result has 729 places, 1802 transitions, 31327 flow [2025-04-13 20:49:12,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=24315, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=990, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=31327, PETRI_PLACES=729, PETRI_TRANSITIONS=1802} [2025-04-13 20:49:12,697 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 705 predicate places. [2025-04-13 20:49:12,697 INFO L485 AbstractCegarLoop]: Abstraction has has 729 places, 1802 transitions, 31327 flow [2025-04-13 20:49:12,697 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:49:12,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:49:12,697 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:49:12,703 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 20:49:12,897 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:49:12,898 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 20:49:12,898 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:49:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash -374674521, now seen corresponding path program 11 times [2025-04-13 20:49:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:49:12,899 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009762136] [2025-04-13 20:49:12,899 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:49:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:49:12,903 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:49:12,910 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:49:12,910 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:49:12,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:49:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:49:13,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:49:13,875 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009762136] [2025-04-13 20:49:13,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009762136] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:49:13,876 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765164717] [2025-04-13 20:49:13,876 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:49:13,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:49:13,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:49:13,878 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 20:49:13,878 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 20:49:13,936 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:49:13,960 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:49:13,960 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:49:13,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:49:13,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-04-13 20:49:13,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:49:14,813 INFO L325 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2025-04-13 20:49:14,813 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 19 [2025-04-13 20:49:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:49:14,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:49:16,153 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:49:16,153 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 57 treesize of output 60 [2025-04-13 20:49:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:49:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765164717] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:49:16,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:49:16,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2025-04-13 20:49:16,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533019590] [2025-04-13 20:49:16,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:49:16,852 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-04-13 20:49:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:49:16,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-04-13 20:49:16,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2803, Unknown=0, NotChecked=0, Total=3080 [2025-04-13 20:49:16,853 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:49:16,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 729 places, 1802 transitions, 31327 flow. Second operand has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:49:16,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:49:16,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:49:16,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:49:19,782 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-04-13 20:49:25,497 INFO L116 PetriNetUnfolderBase]: 5218/9156 cut-off events. [2025-04-13 20:49:25,497 INFO L117 PetriNetUnfolderBase]: For 152106/152106 co-relation queries the response was YES. [2025-04-13 20:49:25,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79048 conditions, 9156 events. 5218/9156 cut-off events. For 152106/152106 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 65899 event pairs, 536 based on Foata normal form. 3/9069 useless extension candidates. Maximal degree in co-relation 78827. Up to 8306 conditions per place. [2025-04-13 20:49:25,639 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1467 selfloop transitions, 424 changer transitions 9/1900 dead transitions. [2025-04-13 20:49:25,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 769 places, 1900 transitions, 35769 flow [2025-04-13 20:49:25,639 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-04-13 20:49:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-04-13 20:49:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 307 transitions. [2025-04-13 20:49:25,640 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2790909090909091 [2025-04-13 20:49:25,640 INFO L175 Difference]: Start difference. First operand has 729 places, 1802 transitions, 31327 flow. Second operand 44 states and 307 transitions. [2025-04-13 20:49:25,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 769 places, 1900 transitions, 35769 flow [2025-04-13 20:49:28,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 1900 transitions, 33697 flow, removed 599 selfloop flow, removed 57 redundant places. [2025-04-13 20:49:28,845 INFO L231 Difference]: Finished difference. Result has 719 places, 1810 transitions, 30391 flow [2025-04-13 20:49:28,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=29267, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=30391, PETRI_PLACES=719, PETRI_TRANSITIONS=1810} [2025-04-13 20:49:28,851 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 695 predicate places. [2025-04-13 20:49:28,851 INFO L485 AbstractCegarLoop]: Abstraction has has 719 places, 1810 transitions, 30391 flow [2025-04-13 20:49:28,851 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:49:28,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:49:28,851 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:49:28,860 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 20:49:29,055 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,SelfDestructingSolverStorable63 [2025-04-13 20:49:29,055 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 20:49:29,055 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:49:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 450140507, now seen corresponding path program 12 times [2025-04-13 20:49:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:49:29,056 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346118857] [2025-04-13 20:49:29,056 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:49:29,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:49:29,061 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:49:29,068 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:49:29,068 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:49:29,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:49:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:49:29,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:49:29,992 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346118857] [2025-04-13 20:49:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346118857] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:49:29,992 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278052346] [2025-04-13 20:49:29,992 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:49:29,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:49:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:49:29,994 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 20:49:29,995 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 20:49:30,065 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:49:30,094 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:49:30,094 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:49:30,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:49:30,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-04-13 20:49:30,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:49:30,835 INFO L325 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2025-04-13 20:49:30,835 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 18 [2025-04-13 20:49:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:49:31,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:49:32,113 INFO L325 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2025-04-13 20:49:32,113 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 68 treesize of output 63 [2025-04-13 20:49:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:49:32,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278052346] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:49:32,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:49:32,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-04-13 20:49:32,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342124617] [2025-04-13 20:49:32,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:49:32,741 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-04-13 20:49:32,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:49:32,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-04-13 20:49:32,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=3062, Unknown=0, NotChecked=0, Total=3422 [2025-04-13 20:49:32,742 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:49:32,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 1810 transitions, 30391 flow. Second operand has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:49:32,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:49:32,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:49:32,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:49:40,648 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:49:44,789 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:49:50,036 WARN L532 Checker$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 20:49:51,467 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:50:08,431 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:50:13,043 INFO L116 PetriNetUnfolderBase]: 5560/9860 cut-off events. [2025-04-13 20:50:13,043 INFO L117 PetriNetUnfolderBase]: For 155855/155855 co-relation queries the response was YES. [2025-04-13 20:50:13,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82445 conditions, 9860 events. 5560/9860 cut-off events. For 155855/155855 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 72385 event pairs, 506 based on Foata normal form. 8/9772 useless extension candidates. Maximal degree in co-relation 82222. Up to 8377 conditions per place. [2025-04-13 20:50:13,199 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 1537 selfloop transitions, 573 changer transitions 80/2190 dead transitions. [2025-04-13 20:50:13,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 2190 transitions, 38977 flow [2025-04-13 20:50:13,200 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2025-04-13 20:50:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2025-04-13 20:50:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 660 transitions. [2025-04-13 20:50:13,201 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2490566037735849 [2025-04-13 20:50:13,201 INFO L175 Difference]: Start difference. First operand has 719 places, 1810 transitions, 30391 flow. Second operand 106 states and 660 transitions. [2025-04-13 20:50:13,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 2190 transitions, 38977 flow [2025-04-13 20:50:16,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 2190 transitions, 38195 flow, removed 74 selfloop flow, removed 32 redundant places. [2025-04-13 20:50:16,526 INFO L231 Difference]: Finished difference. Result has 820 places, 1975 transitions, 34416 flow [2025-04-13 20:50:16,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=29676, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1810, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=34416, PETRI_PLACES=820, PETRI_TRANSITIONS=1975} [2025-04-13 20:50:16,528 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 796 predicate places. [2025-04-13 20:50:16,528 INFO L485 AbstractCegarLoop]: Abstraction has has 820 places, 1975 transitions, 34416 flow [2025-04-13 20:50:16,528 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:50:16,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:50:16,528 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:50:16,534 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 20:50:16,728 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,SelfDestructingSolverStorable64 [2025-04-13 20:50:16,729 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 20:50:16,729 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:50:16,730 INFO L85 PathProgramCache]: Analyzing trace with hash -575562449, now seen corresponding path program 13 times [2025-04-13 20:50:16,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:50:16,730 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77372499] [2025-04-13 20:50:16,730 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:50:16,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:50:16,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:50:16,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:50:16,741 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:50:16,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:50:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:50:17,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:50:17,428 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77372499] [2025-04-13 20:50:17,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77372499] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:50:17,428 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799904947] [2025-04-13 20:50:17,428 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:50:17,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:50:17,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:50:17,430 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 20:50:17,430 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 20:50:17,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:50:17,505 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:50:17,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:50:17,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:50:17,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-04-13 20:50:17,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:50:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:50:18,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:50:19,205 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:50:19,206 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 66 treesize of output 68 [2025-04-13 20:50:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:50:19,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799904947] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:50:19,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:50:19,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 54 [2025-04-13 20:50:19,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476864616] [2025-04-13 20:50:19,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:50:19,668 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-04-13 20:50:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:50:19,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-04-13 20:50:19,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2806, Unknown=0, NotChecked=0, Total=3080 [2025-04-13 20:50:19,669 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:50:19,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 1975 transitions, 34416 flow. Second operand has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:50:19,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:50:19,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:50:19,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:50:30,527 INFO L116 PetriNetUnfolderBase]: 5578/9868 cut-off events. [2025-04-13 20:50:30,527 INFO L117 PetriNetUnfolderBase]: For 176587/176587 co-relation queries the response was YES. [2025-04-13 20:50:30,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86104 conditions, 9868 events. 5578/9868 cut-off events. For 176587/176587 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 72654 event pairs, 290 based on Foata normal form. 8/9780 useless extension candidates. Maximal degree in co-relation 85853. Up to 8414 conditions per place. [2025-04-13 20:50:30,710 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1546 selfloop transitions, 586 changer transitions 35/2167 dead transitions. [2025-04-13 20:50:30,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 2167 transitions, 41248 flow [2025-04-13 20:50:30,711 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-04-13 20:50:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-04-13 20:50:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 402 transitions. [2025-04-13 20:50:30,712 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.28714285714285714 [2025-04-13 20:50:30,712 INFO L175 Difference]: Start difference. First operand has 820 places, 1975 transitions, 34416 flow. Second operand 56 states and 402 transitions. [2025-04-13 20:50:30,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 2167 transitions, 41248 flow [2025-04-13 20:50:34,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 2167 transitions, 40282 flow, removed 370 selfloop flow, removed 51 redundant places. [2025-04-13 20:50:34,722 INFO L231 Difference]: Finished difference. Result has 834 places, 2027 transitions, 36638 flow [2025-04-13 20:50:34,723 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=33468, PETRI_DIFFERENCE_MINUEND_PLACES=761, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=36638, PETRI_PLACES=834, PETRI_TRANSITIONS=2027} [2025-04-13 20:50:34,724 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 810 predicate places. [2025-04-13 20:50:34,724 INFO L485 AbstractCegarLoop]: Abstraction has has 834 places, 2027 transitions, 36638 flow [2025-04-13 20:50:34,724 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:50:34,724 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:50:34,724 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:50:34,730 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 20:50:34,924 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:50:34,925 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 20:50:34,925 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:50:34,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1426706581, now seen corresponding path program 14 times [2025-04-13 20:50:34,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:50:34,926 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488303053] [2025-04-13 20:50:34,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:50:34,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:50:34,931 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:50:34,938 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:50:34,938 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:50:34,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:50:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:50:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:50:35,776 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488303053] [2025-04-13 20:50:35,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488303053] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:50:35,776 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547014206] [2025-04-13 20:50:35,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:50:35,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:50:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:50:35,778 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 20:50:35,778 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 20:50:35,839 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:50:35,863 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:50:35,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:50:35,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:50:35,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-04-13 20:50:35,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:50:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:50:36,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:50:37,794 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:50:37,794 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 58 treesize of output 60 [2025-04-13 20:50:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:50:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547014206] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:50:38,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:50:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2025-04-13 20:50:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463008488] [2025-04-13 20:50:38,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:50:38,331 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-04-13 20:50:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:50:38,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-04-13 20:50:38,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2960, Unknown=0, NotChecked=0, Total=3192 [2025-04-13 20:50:38,331 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:50:38,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 834 places, 2027 transitions, 36638 flow. Second operand has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:50:38,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:50:38,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:50:38,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:50:48,761 INFO L116 PetriNetUnfolderBase]: 5568/9848 cut-off events. [2025-04-13 20:50:48,762 INFO L117 PetriNetUnfolderBase]: For 186330/186330 co-relation queries the response was YES. [2025-04-13 20:50:48,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87990 conditions, 9848 events. 5568/9848 cut-off events. For 186330/186330 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 72452 event pairs, 348 based on Foata normal form. 5/9741 useless extension candidates. Maximal degree in co-relation 87733. Up to 8805 conditions per place. [2025-04-13 20:50:48,957 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 1667 selfloop transitions, 454 changer transitions 29/2150 dead transitions. [2025-04-13 20:50:48,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 2150 transitions, 41946 flow [2025-04-13 20:50:48,958 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-04-13 20:50:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2025-04-13 20:50:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 379 transitions. [2025-04-13 20:50:48,959 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26596491228070174 [2025-04-13 20:50:48,959 INFO L175 Difference]: Start difference. First operand has 834 places, 2027 transitions, 36638 flow. Second operand 57 states and 379 transitions. [2025-04-13 20:50:48,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 2150 transitions, 41946 flow [2025-04-13 20:50:53,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 2150 transitions, 41081 flow, removed 306 selfloop flow, removed 34 redundant places. [2025-04-13 20:50:53,154 INFO L231 Difference]: Finished difference. Result has 863 places, 2032 transitions, 36986 flow [2025-04-13 20:50:53,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=35811, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=36986, PETRI_PLACES=863, PETRI_TRANSITIONS=2032} [2025-04-13 20:50:53,156 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 839 predicate places. [2025-04-13 20:50:53,156 INFO L485 AbstractCegarLoop]: Abstraction has has 863 places, 2032 transitions, 36986 flow [2025-04-13 20:50:53,156 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:50:53,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:50:53,156 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:50:53,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2025-04-13 20:50:53,356 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,SelfDestructingSolverStorable66 [2025-04-13 20:50:53,357 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 20:50:53,357 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:50:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1141884159, now seen corresponding path program 15 times [2025-04-13 20:50:53,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:50:53,357 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214408801] [2025-04-13 20:50:53,357 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:50:53,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:50:53,363 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:50:53,369 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:50:53,369 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:50:53,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:50:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:50:53,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:50:53,755 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214408801] [2025-04-13 20:50:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214408801] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:50:53,755 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223933015] [2025-04-13 20:50:53,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:50:53,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:50:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:50:53,756 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 20:50:53,757 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 20:50:53,817 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:50:53,864 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:50:53,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:50:53,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:50:53,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 20:50:53,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:50:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:50:54,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:50:54,984 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:50:54,985 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 77 [2025-04-13 20:50:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:50:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223933015] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:50:55,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:50:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2025-04-13 20:50:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421306692] [2025-04-13 20:50:55,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:50:55,182 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-04-13 20:50:55,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:50:55,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-04-13 20:50:55,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2025-04-13 20:50:55,183 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:50:55,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 863 places, 2032 transitions, 36986 flow. Second operand has 39 states, 39 states have (on average 3.641025641025641) internal successors, (142), 39 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:50:55,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:50:55,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:50:55,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:51:00,718 INFO L116 PetriNetUnfolderBase]: 5626/9972 cut-off events. [2025-04-13 20:51:00,718 INFO L117 PetriNetUnfolderBase]: For 200123/200123 co-relation queries the response was YES. [2025-04-13 20:51:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89931 conditions, 9972 events. 5626/9972 cut-off events. For 200123/200123 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 73617 event pairs, 358 based on Foata normal form. 6/9866 useless extension candidates. Maximal degree in co-relation 89670. Up to 8501 conditions per place. [2025-04-13 20:51:00,909 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 1895 selfloop transitions, 258 changer transitions 35/2188 dead transitions. [2025-04-13 20:51:00,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 880 places, 2188 transitions, 43663 flow [2025-04-13 20:51:00,909 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 20:51:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 20:51:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 172 transitions. [2025-04-13 20:51:00,910 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2866666666666667 [2025-04-13 20:51:00,910 INFO L175 Difference]: Start difference. First operand has 863 places, 2032 transitions, 36986 flow. Second operand 24 states and 172 transitions. [2025-04-13 20:51:00,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 880 places, 2188 transitions, 43663 flow [2025-04-13 20:51:05,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 841 places, 2188 transitions, 42996 flow, removed 101 selfloop flow, removed 39 redundant places. [2025-04-13 20:51:05,315 INFO L231 Difference]: Finished difference. Result has 852 places, 2042 transitions, 37328 flow [2025-04-13 20:51:05,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=36327, PETRI_DIFFERENCE_MINUEND_PLACES=818, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2032, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=37328, PETRI_PLACES=852, PETRI_TRANSITIONS=2042} [2025-04-13 20:51:05,317 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 828 predicate places. [2025-04-13 20:51:05,317 INFO L485 AbstractCegarLoop]: Abstraction has has 852 places, 2042 transitions, 37328 flow [2025-04-13 20:51:05,317 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.641025641025641) internal successors, (142), 39 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:51:05,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:51:05,317 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:51:05,323 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 20:51:05,517 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2025-04-13 20:51:05,518 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 20:51:05,518 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:51:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash 399527587, now seen corresponding path program 16 times [2025-04-13 20:51:05,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:51:05,519 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382035890] [2025-04-13 20:51:05,519 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:51:05,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:51:05,524 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:51:05,530 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:51:05,530 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:51:05,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:51:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:51:06,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:51:06,274 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382035890] [2025-04-13 20:51:06,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382035890] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:51:06,274 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440803130] [2025-04-13 20:51:06,274 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:51:06,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:51:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:51:06,275 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 20:51:06,276 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 20:51:06,337 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:51:06,360 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:51:06,360 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:51:06,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:51:06,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-04-13 20:51:06,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:51:07,202 INFO L325 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-04-13 20:51:07,202 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2025-04-13 20:51:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:51:07,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:51:08,290 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:51:08,290 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 57 treesize of output 60 [2025-04-13 20:51:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:51:08,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440803130] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:51:08,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:51:08,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2025-04-13 20:51:08,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085381575] [2025-04-13 20:51:08,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:51:08,839 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-04-13 20:51:08,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:51:08,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-04-13 20:51:08,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2025-04-13 20:51:08,840 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:51:08,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 852 places, 2042 transitions, 37328 flow. Second operand has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:51:08,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:51:08,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:51:08,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:51:27,383 INFO L116 PetriNetUnfolderBase]: 6734/11854 cut-off events. [2025-04-13 20:51:27,384 INFO L117 PetriNetUnfolderBase]: For 344812/344812 co-relation queries the response was YES. [2025-04-13 20:51:27,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114397 conditions, 11854 events. 6734/11854 cut-off events. For 344812/344812 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 89848 event pairs, 359 based on Foata normal form. 6/11732 useless extension candidates. Maximal degree in co-relation 114131. Up to 5395 conditions per place. [2025-04-13 20:51:27,621 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 1254 selfloop transitions, 1375 changer transitions 38/2667 dead transitions. [2025-04-13 20:51:27,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 937 places, 2667 transitions, 55039 flow [2025-04-13 20:51:27,622 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2025-04-13 20:51:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2025-04-13 20:51:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 637 transitions. [2025-04-13 20:51:27,623 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26821052631578945 [2025-04-13 20:51:27,623 INFO L175 Difference]: Start difference. First operand has 852 places, 2042 transitions, 37328 flow. Second operand 95 states and 637 transitions. [2025-04-13 20:51:27,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 937 places, 2667 transitions, 55039 flow [2025-04-13 20:51:34,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 925 places, 2667 transitions, 54434 flow, removed 231 selfloop flow, removed 12 redundant places. [2025-04-13 20:51:34,061 INFO L231 Difference]: Finished difference. Result has 958 places, 2450 transitions, 52095 flow [2025-04-13 20:51:34,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=36790, PETRI_DIFFERENCE_MINUEND_PLACES=831, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=52095, PETRI_PLACES=958, PETRI_TRANSITIONS=2450} [2025-04-13 20:51:34,063 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 934 predicate places. [2025-04-13 20:51:34,063 INFO L485 AbstractCegarLoop]: Abstraction has has 958 places, 2450 transitions, 52095 flow [2025-04-13 20:51:34,063 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:51:34,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:51:34,063 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:51:34,070 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 20:51:34,264 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:51:34,264 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 20:51:34,265 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:51:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash 84024649, now seen corresponding path program 17 times [2025-04-13 20:51:34,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:51:34,265 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844959638] [2025-04-13 20:51:34,265 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:51:34,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:51:34,271 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:51:34,281 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:51:34,281 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:51:34,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:51:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:51:34,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:51:34,977 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844959638] [2025-04-13 20:51:34,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844959638] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:51:34,977 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540516363] [2025-04-13 20:51:34,977 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:51:34,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:51:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:51:34,979 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 20:51:34,980 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 20:51:35,049 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:51:35,085 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:51:35,085 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:51:35,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:51:35,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-04-13 20:51:35,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:51:35,892 INFO L325 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2025-04-13 20:51:35,893 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 39 [2025-04-13 20:51:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:51:36,313 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:51:37,428 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:51:37,428 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 86 treesize of output 97 [2025-04-13 20:51:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:51:38,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540516363] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:51:38,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:51:38,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2025-04-13 20:51:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273613079] [2025-04-13 20:51:38,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:51:38,208 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-04-13 20:51:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:51:38,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-04-13 20:51:38,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2025-04-13 20:51:38,209 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:51:38,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 958 places, 2450 transitions, 52095 flow. Second operand has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:51:38,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:51:38,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:51:38,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:51:47,688 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:51:51,756 WARN L532 Checker$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 20:51:58,460 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:52:02,466 WARN L532 Checker$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 20:52:09,720 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:52:10,727 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:52:20,463 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:52:22,948 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:52:29,350 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-13 20:52:33,902 INFO L116 PetriNetUnfolderBase]: 7108/12527 cut-off events. [2025-04-13 20:52:33,902 INFO L117 PetriNetUnfolderBase]: For 398382/398382 co-relation queries the response was YES. [2025-04-13 20:52:34,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131205 conditions, 12527 events. 7108/12527 cut-off events. For 398382/398382 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 96313 event pairs, 715 based on Foata normal form. 2/12423 useless extension candidates. Maximal degree in co-relation 130909. Up to 11461 conditions per place. [2025-04-13 20:52:34,160 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 2251 selfloop transitions, 492 changer transitions 37/2780 dead transitions. [2025-04-13 20:52:34,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1012 places, 2780 transitions, 63781 flow [2025-04-13 20:52:34,160 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-04-13 20:52:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2025-04-13 20:52:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 406 transitions. [2025-04-13 20:52:34,161 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2577777777777778 [2025-04-13 20:52:34,161 INFO L175 Difference]: Start difference. First operand has 958 places, 2450 transitions, 52095 flow. Second operand 63 states and 406 transitions. [2025-04-13 20:52:34,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1012 places, 2780 transitions, 63781 flow [2025-04-13 20:52:46,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 967 places, 2780 transitions, 59574 flow, removed 1930 selfloop flow, removed 45 redundant places. [2025-04-13 20:52:46,417 INFO L231 Difference]: Finished difference. Result has 1001 places, 2659 transitions, 54718 flow [2025-04-13 20:52:46,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=47953, PETRI_DIFFERENCE_MINUEND_PLACES=905, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2013, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=54718, PETRI_PLACES=1001, PETRI_TRANSITIONS=2659} [2025-04-13 20:52:46,419 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 977 predicate places. [2025-04-13 20:52:46,419 INFO L485 AbstractCegarLoop]: Abstraction has has 1001 places, 2659 transitions, 54718 flow [2025-04-13 20:52:46,419 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:52:46,419 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:52:46,419 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:52:46,425 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 20:52:46,619 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:52:46,620 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 20:52:46,621 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:52:46,621 INFO L85 PathProgramCache]: Analyzing trace with hash 192914377, now seen corresponding path program 18 times [2025-04-13 20:52:46,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:52:46,621 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686250484] [2025-04-13 20:52:46,621 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:52:46,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:52:46,626 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:52:46,633 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:52:46,633 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:52:46,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:52:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:52:47,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:52:47,294 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686250484] [2025-04-13 20:52:47,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686250484] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:52:47,294 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214061884] [2025-04-13 20:52:47,294 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:52:47,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:52:47,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:52:47,296 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 20:52:47,297 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 20:52:47,359 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:52:47,383 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:52:47,383 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-13 20:52:47,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:52:47,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-04-13 20:52:47,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:52:48,214 INFO L325 Elim1Store]: treesize reduction 41, result has 25.5 percent of original size [2025-04-13 20:52:48,214 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 26 [2025-04-13 20:52:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:52:48,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:52:50,141 INFO L325 Elim1Store]: treesize reduction 16, result has 80.2 percent of original size [2025-04-13 20:52:50,141 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 115 [2025-04-13 20:52:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:52:50,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214061884] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:52:50,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:52:50,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-04-13 20:52:50,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613958128] [2025-04-13 20:52:50,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:52:50,950 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-04-13 20:52:50,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:52:50,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-04-13 20:52:50,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=3036, Unknown=0, NotChecked=0, Total=3422 [2025-04-13 20:52:50,951 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:52:50,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1001 places, 2659 transitions, 54718 flow. Second operand has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:52:50,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:52:50,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:52:50,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:16,343 INFO L116 PetriNetUnfolderBase]: 7781/13941 cut-off events. [2025-04-13 20:53:16,343 INFO L117 PetriNetUnfolderBase]: For 405950/405950 co-relation queries the response was YES. [2025-04-13 20:53:16,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143821 conditions, 13941 events. 7781/13941 cut-off events. For 405950/405950 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 111417 event pairs, 406 based on Foata normal form. 3/13830 useless extension candidates. Maximal degree in co-relation 143501. Up to 10065 conditions per place. [2025-04-13 20:53:16,665 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 1933 selfloop transitions, 1280 changer transitions 38/3251 dead transitions. [2025-04-13 20:53:16,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1082 places, 3251 transitions, 72995 flow [2025-04-13 20:53:16,665 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2025-04-13 20:53:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2025-04-13 20:53:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 572 transitions. [2025-04-13 20:53:16,666 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25422222222222224 [2025-04-13 20:53:16,666 INFO L175 Difference]: Start difference. First operand has 1001 places, 2659 transitions, 54718 flow. Second operand 90 states and 572 transitions. [2025-04-13 20:53:16,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1082 places, 3251 transitions, 72995 flow [2025-04-13 20:53:28,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1062 places, 3251 transitions, 70735 flow, removed 1058 selfloop flow, removed 20 redundant places. [2025-04-13 20:53:28,744 INFO L231 Difference]: Finished difference. Result has 1100 places, 3091 transitions, 67533 flow [2025-04-13 20:53:28,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=53036, PETRI_DIFFERENCE_MINUEND_PLACES=973, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=913, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=67533, PETRI_PLACES=1100, PETRI_TRANSITIONS=3091} [2025-04-13 20:53:28,746 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1076 predicate places. [2025-04-13 20:53:28,746 INFO L485 AbstractCegarLoop]: Abstraction has has 1100 places, 3091 transitions, 67533 flow [2025-04-13 20:53:28,746 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:28,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:53:28,746 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:53:28,753 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 20:53:28,947 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:28,947 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 20:53:28,948 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:53:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash -367775407, now seen corresponding path program 19 times [2025-04-13 20:53:28,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:53:28,948 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066065001] [2025-04-13 20:53:28,948 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:53:28,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:53:28,959 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:53:28,966 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:53:28,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:28,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:29,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:53:29,690 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066065001] [2025-04-13 20:53:29,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066065001] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:53:29,690 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803464502] [2025-04-13 20:53:29,690 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:53:29,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:53:29,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:53:29,692 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 20:53:29,692 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 20:53:29,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:53:29,783 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:53:29,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:53:29,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:53:29,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjuncts are in the unsatisfiable core [2025-04-13 20:53:29,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:53:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:30,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:53:31,608 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:53:31,608 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 58 treesize of output 60 [2025-04-13 20:53:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:53:32,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803464502] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:53:32,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:53:32,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2025-04-13 20:53:32,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116971645] [2025-04-13 20:53:32,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:53:32,114 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2025-04-13 20:53:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:53:32,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2025-04-13 20:53:32,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2917, Unknown=0, NotChecked=0, Total=3192 [2025-04-13 20:53:32,115 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:53:32,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1100 places, 3091 transitions, 67533 flow. Second operand has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:53:32,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:53:32,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:53:32,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:53:44,416 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 [] [2025-04-13 20:53:46,485 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:53:55,598 INFO L116 PetriNetUnfolderBase]: 7851/14110 cut-off events. [2025-04-13 20:53:55,598 INFO L117 PetriNetUnfolderBase]: For 414242/414242 co-relation queries the response was YES. [2025-04-13 20:53:55,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149787 conditions, 14110 events. 7851/14110 cut-off events. For 414242/414242 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 113591 event pairs, 375 based on Foata normal form. 6/14000 useless extension candidates. Maximal degree in co-relation 149433. Up to 11696 conditions per place. [2025-04-13 20:53:55,991 INFO L140 encePairwiseOnDemand]: 11/25 looper letters, 2305 selfloop transitions, 954 changer transitions 35/3294 dead transitions. [2025-04-13 20:53:55,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1166 places, 3294 transitions, 76739 flow [2025-04-13 20:53:55,992 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-04-13 20:53:55,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2025-04-13 20:53:55,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 489 transitions. [2025-04-13 20:53:55,992 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26794520547945205 [2025-04-13 20:53:55,992 INFO L175 Difference]: Start difference. First operand has 1100 places, 3091 transitions, 67533 flow. Second operand 73 states and 489 transitions. [2025-04-13 20:53:55,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1166 places, 3294 transitions, 76739 flow [2025-04-13 20:54:10,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1129 places, 3294 transitions, 73097 flow, removed 1650 selfloop flow, removed 37 redundant places. [2025-04-13 20:54:10,726 INFO L231 Difference]: Finished difference. Result has 1149 places, 3142 transitions, 68043 flow [2025-04-13 20:54:10,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=63923, PETRI_DIFFERENCE_MINUEND_PLACES=1057, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=903, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=68043, PETRI_PLACES=1149, PETRI_TRANSITIONS=3142} [2025-04-13 20:54:10,728 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1125 predicate places. [2025-04-13 20:54:10,729 INFO L485 AbstractCegarLoop]: Abstraction has has 1149 places, 3142 transitions, 68043 flow [2025-04-13 20:54:10,729 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.3684210526315788) internal successors, (192), 57 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:54:10,729 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:10,729 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:10,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2025-04-13 20:54:10,929 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:10,929 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 20:54:10,930 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:10,930 INFO L85 PathProgramCache]: Analyzing trace with hash 933149769, now seen corresponding path program 20 times [2025-04-13 20:54:10,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:10,930 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191545107] [2025-04-13 20:54:10,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:54:10,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:10,936 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:54:10,944 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:10,944 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:54:10,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:11,629 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191545107] [2025-04-13 20:54:11,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191545107] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:11,630 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319310311] [2025-04-13 20:54:11,630 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:54:11,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:11,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:11,631 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 20:54:11,632 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 20:54:11,698 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:54:11,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:54:11,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:54:11,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:11,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 67 conjuncts are in the unsatisfiable core [2025-04-13 20:54:11,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:12,528 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-13 20:54:12,535 INFO L325 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2025-04-13 20:54:12,535 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2025-04-13 20:54:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:12,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:54:14,113 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:54:14,113 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 137 [2025-04-13 20:54:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:54:14,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319310311] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:54:14,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:54:14,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-04-13 20:54:14,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481186446] [2025-04-13 20:54:14,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:54:14,953 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-04-13 20:54:14,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:54:14,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-04-13 20:54:14,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=3041, Unknown=0, NotChecked=0, Total=3422 [2025-04-13 20:54:14,954 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:54:14,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1149 places, 3142 transitions, 68043 flow. Second operand has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:54:14,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:54:14,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:54:14,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:54:22,120 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-13 20:54:30,481 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-04-13 20:54:38,765 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-13 20:54:44,707 INFO L116 PetriNetUnfolderBase]: 7928/14310 cut-off events. [2025-04-13 20:54:44,707 INFO L117 PetriNetUnfolderBase]: For 371337/371337 co-relation queries the response was YES. [2025-04-13 20:54:45,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148614 conditions, 14310 events. 7928/14310 cut-off events. For 371337/371337 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 116100 event pairs, 628 based on Foata normal form. 1/14133 useless extension candidates. Maximal degree in co-relation 148248. Up to 12083 conditions per place. [2025-04-13 20:54:45,117 INFO L140 encePairwiseOnDemand]: 9/25 looper letters, 2654 selfloop transitions, 648 changer transitions 22/3324 dead transitions. [2025-04-13 20:54:45,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1212 places, 3324 transitions, 77078 flow [2025-04-13 20:54:45,118 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2025-04-13 20:54:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2025-04-13 20:54:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 448 transitions. [2025-04-13 20:54:45,119 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2523943661971831 [2025-04-13 20:54:45,119 INFO L175 Difference]: Start difference. First operand has 1149 places, 3142 transitions, 68043 flow. Second operand 71 states and 448 transitions. [2025-04-13 20:54:45,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1212 places, 3324 transitions, 77078 flow [2025-04-13 20:54:58,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1175 places, 3324 transitions, 75943 flow, removed 343 selfloop flow, removed 37 redundant places. [2025-04-13 20:54:58,615 INFO L231 Difference]: Finished difference. Result has 1195 places, 3205 transitions, 70365 flow [2025-04-13 20:54:58,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=66940, PETRI_DIFFERENCE_MINUEND_PLACES=1105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=587, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=70365, PETRI_PLACES=1195, PETRI_TRANSITIONS=3205} [2025-04-13 20:54:58,618 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1171 predicate places. [2025-04-13 20:54:58,618 INFO L485 AbstractCegarLoop]: Abstraction has has 1195 places, 3205 transitions, 70365 flow [2025-04-13 20:54:58,618 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:54:58,618 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:54:58,618 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:54:58,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2025-04-13 20:54:58,818 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,SelfDestructingSolverStorable72 [2025-04-13 20:54:58,819 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 20:54:58,819 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:54:58,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1058330013, now seen corresponding path program 21 times [2025-04-13 20:54:58,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:54:58,820 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196287762] [2025-04-13 20:54:58,820 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:54:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:54:58,825 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:54:58,831 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:54:58,831 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:54:58,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:54:59,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:54:59,251 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196287762] [2025-04-13 20:54:59,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196287762] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:54:59,251 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139225041] [2025-04-13 20:54:59,251 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:54:59,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:54:59,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:54:59,253 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 20:54:59,253 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 20:54:59,318 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:54:59,373 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 26 statements. [2025-04-13 20:54:59,374 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:54:59,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:54:59,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-04-13 20:54:59,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:54:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:54:59,783 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:55:00,482 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:55:00,482 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 70 treesize of output 63 [2025-04-13 20:55:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-13 20:55:00,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139225041] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:55:00,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:55:00,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2025-04-13 20:55:00,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873080502] [2025-04-13 20:55:00,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:55:00,609 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-04-13 20:55:00,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:00,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-04-13 20:55:00,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2025-04-13 20:55:00,609 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:55:00,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1195 places, 3205 transitions, 70365 flow. Second operand has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 41 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:55:00,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:00,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:55:00,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:12,926 INFO L116 PetriNetUnfolderBase]: 7984/14428 cut-off events. [2025-04-13 20:55:12,926 INFO L117 PetriNetUnfolderBase]: For 386781/386781 co-relation queries the response was YES. [2025-04-13 20:55:13,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150964 conditions, 14428 events. 7984/14428 cut-off events. For 386781/386781 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 117435 event pairs, 458 based on Foata normal form. 4/14280 useless extension candidates. Maximal degree in co-relation 150583. Up to 12701 conditions per place. [2025-04-13 20:55:13,302 INFO L140 encePairwiseOnDemand]: 13/25 looper letters, 2864 selfloop transitions, 399 changer transitions 20/3283 dead transitions. [2025-04-13 20:55:13,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1212 places, 3283 transitions, 78225 flow [2025-04-13 20:55:13,303 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-13 20:55:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-13 20:55:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 157 transitions. [2025-04-13 20:55:13,303 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27304347826086955 [2025-04-13 20:55:13,303 INFO L175 Difference]: Start difference. First operand has 1195 places, 3205 transitions, 70365 flow. Second operand 23 states and 157 transitions. [2025-04-13 20:55:13,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1212 places, 3283 transitions, 78225 flow [2025-04-13 20:55:27,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1180 places, 3283 transitions, 77398 flow, removed 249 selfloop flow, removed 32 redundant places. [2025-04-13 20:55:27,864 INFO L231 Difference]: Finished difference. Result has 1188 places, 3225 transitions, 71217 flow [2025-04-13 20:55:27,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=69542, PETRI_DIFFERENCE_MINUEND_PLACES=1158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=71217, PETRI_PLACES=1188, PETRI_TRANSITIONS=3225} [2025-04-13 20:55:27,866 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1164 predicate places. [2025-04-13 20:55:27,866 INFO L485 AbstractCegarLoop]: Abstraction has has 1188 places, 3225 transitions, 71217 flow [2025-04-13 20:55:27,866 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 41 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:55:27,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:55:27,866 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:55:27,872 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 20:55:28,066 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,SelfDestructingSolverStorable73 [2025-04-13 20:55:28,067 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 20:55:28,068 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:55:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash 211017073, now seen corresponding path program 22 times [2025-04-13 20:55:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:55:28,068 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200016051] [2025-04-13 20:55:28,068 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:55:28,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:55:28,073 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:55:28,079 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:55:28,079 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:55:28,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:28,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:55:28,831 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200016051] [2025-04-13 20:55:28,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200016051] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:55:28,831 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522574462] [2025-04-13 20:55:28,831 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:55:28,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:55:28,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:55:28,833 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 20:55:28,834 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 20:55:28,900 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:55:28,923 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:55:28,923 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:55:28,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:55:28,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-04-13 20:55:28,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:55:29,591 INFO L325 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2025-04-13 20:55:29,591 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 18 [2025-04-13 20:55:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:29,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:55:30,544 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:55:30,544 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 65 treesize of output 68 [2025-04-13 20:55:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:55:31,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522574462] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:55:31,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:55:31,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 53 [2025-04-13 20:55:31,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897917494] [2025-04-13 20:55:31,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:55:31,146 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-04-13 20:55:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:55:31,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-04-13 20:55:31,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2654, Unknown=0, NotChecked=0, Total=2970 [2025-04-13 20:55:31,147 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:55:31,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1188 places, 3225 transitions, 71217 flow. Second operand has 55 states, 55 states have (on average 3.418181818181818) internal successors, (188), 55 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:55:31,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:55:31,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:55:31,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:55:59,165 INFO L116 PetriNetUnfolderBase]: 8400/15217 cut-off events. [2025-04-13 20:55:59,165 INFO L117 PetriNetUnfolderBase]: For 465426/465426 co-relation queries the response was YES. [2025-04-13 20:55:59,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162519 conditions, 15217 events. 8400/15217 cut-off events. For 465426/465426 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 125223 event pairs, 621 based on Foata normal form. 13/15078 useless extension candidates. Maximal degree in co-relation 162133. Up to 6964 conditions per place. [2025-04-13 20:55:59,817 INFO L140 encePairwiseOnDemand]: 10/25 looper letters, 1787 selfloop transitions, 1815 changer transitions 39/3641 dead transitions. [2025-04-13 20:55:59,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1292 places, 3641 transitions, 86264 flow [2025-04-13 20:55:59,817 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2025-04-13 20:55:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2025-04-13 20:55:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 748 transitions. [2025-04-13 20:55:59,818 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2744954128440367 [2025-04-13 20:55:59,818 INFO L175 Difference]: Start difference. First operand has 1188 places, 3225 transitions, 71217 flow. Second operand 109 states and 748 transitions. [2025-04-13 20:55:59,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1292 places, 3641 transitions, 86264 flow [2025-04-13 20:56:16,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1281 places, 3641 transitions, 85710 flow, removed 193 selfloop flow, removed 11 redundant places. [2025-04-13 20:56:16,727 INFO L231 Difference]: Finished difference. Result has 1299 places, 3390 transitions, 79452 flow [2025-04-13 20:56:16,729 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=70689, PETRI_DIFFERENCE_MINUEND_PLACES=1173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=79452, PETRI_PLACES=1299, PETRI_TRANSITIONS=3390} [2025-04-13 20:56:16,729 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 1275 predicate places. [2025-04-13 20:56:16,730 INFO L485 AbstractCegarLoop]: Abstraction has has 1299 places, 3390 transitions, 79452 flow [2025-04-13 20:56:16,730 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.418181818181818) internal successors, (188), 55 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:56:16,730 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:56:16,730 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:56:16,736 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 20:56:16,930 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:16,930 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 20:56:16,931 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:56:16,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1520895091, now seen corresponding path program 23 times [2025-04-13 20:56:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:56:16,932 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231838025] [2025-04-13 20:56:16,932 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:56:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:56:16,937 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:56:16,943 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:56:16,943 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:56:16,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:56:17,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:56:17,581 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231838025] [2025-04-13 20:56:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231838025] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:56:17,581 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243260255] [2025-04-13 20:56:17,581 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:56:17,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:56:17,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:56:17,583 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 20:56:17,584 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 20:56:17,653 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-13 20:56:17,694 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:56:17,694 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-13 20:56:17,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:56:17,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 62 conjuncts are in the unsatisfiable core [2025-04-13 20:56:17,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:56:18,548 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-13 20:56:18,549 INFO L172 IndexEqualityManager]: detected equality via solver [2025-04-13 20:56:18,551 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:56:18,551 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2025-04-13 20:56:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:56:18,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:56:19,576 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-13 20:56:19,576 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 68 treesize of output 71 [2025-04-13 20:56:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:56:20,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243260255] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:56:20,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:56:20,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2025-04-13 20:56:20,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475122166] [2025-04-13 20:56:20,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:56:20,217 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-04-13 20:56:20,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:56:20,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-04-13 20:56:20,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2802, Unknown=0, NotChecked=0, Total=3080 [2025-04-13 20:56:20,218 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 20:56:20,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1299 places, 3390 transitions, 79452 flow. Second operand has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:56:20,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:56:20,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 20:56:20,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:56:25,292 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:56:27,286 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:56:32,545 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Received shutdown request... [2025-04-13 20:56:36,107 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 20:56:36,111 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 20:56:37,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2025-04-13 20:56:37,223 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-13 20:56:37,225 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 20:56:37,226 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2025-04-13 20:56:37,226 WARN L610 AbstractCegarLoop]: Verification canceled: while executing Executor. [2025-04-13 20:56:37,233 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 20:56:37,233 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 20:56:37,233 INFO L422 BasicCegarLoop]: Path program histogram: [42, 23, 5, 2, 2, 1, 1] [2025-04-13 20:56:37,240 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 20:56:37,240 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 20:56:37,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 08:56:37 BasicIcfg [2025-04-13 20:56:37,246 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 20:56:37,247 INFO L158 Benchmark]: Toolchain (without parser) took 823459.49ms. Allocated memory was 142.6MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 99.5MB in the beginning and 622.0MB in the end (delta: -522.5MB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. [2025-04-13 20:56:37,247 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 167.8MB. Free memory is still 95.5MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:56:37,247 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.65ms. Allocated memory is still 142.6MB. Free memory was 99.5MB in the beginning and 84.8MB in the end (delta: 14.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-13 20:56:37,247 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.31ms. Allocated memory is still 142.6MB. Free memory was 84.8MB in the beginning and 82.5MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:56:37,247 INFO L158 Benchmark]: Boogie Preprocessor took 50.27ms. Allocated memory is still 142.6MB. Free memory was 82.5MB in the beginning and 80.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:56:37,247 INFO L158 Benchmark]: RCFGBuilder took 538.26ms. Allocated memory is still 142.6MB. Free memory was 80.6MB in the beginning and 98.8MB in the end (delta: -18.2MB). Peak memory consumption was 65.0MB. Max. memory is 8.0GB. [2025-04-13 20:56:37,247 INFO L158 Benchmark]: TraceAbstraction took 822576.79ms. Allocated memory was 142.6MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 98.1MB in the beginning and 622.0MB in the end (delta: -523.9MB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. [2025-04-13 20:56:37,248 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 167.8MB. Free memory is still 95.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 249.65ms. Allocated memory is still 142.6MB. Free memory was 99.5MB in the beginning and 84.8MB in the end (delta: 14.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.31ms. Allocated memory is still 142.6MB. Free memory was 84.8MB in the beginning and 82.5MB in the end (delta: 2.3MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.27ms. Allocated memory is still 142.6MB. Free memory was 82.5MB in the beginning and 80.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 538.26ms. Allocated memory is still 142.6MB. Free memory was 80.6MB in the beginning and 98.8MB in the end (delta: -18.2MB). Peak memory consumption was 65.0MB. Max. memory is 8.0GB. * TraceAbstraction took 822576.79ms. Allocated memory was 142.6MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 98.1MB in the beginning and 622.0MB in the end (delta: -523.9MB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 33 locations, 41 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 822.5s, OverallIterations: 76, TraceHistogramMax: 3, PathProgramHistogramMax: 42, EmptinessCheckTime: 0.0s, AutomataDifference: 690.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 mSolverCounterUnknown, 9537 SdHoareTripleChecker+Valid, 258.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9537 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 250.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 7261 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 117675 IncrementalHoareTripleChecker+Invalid, 124962 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7261 mSolverCounterUnsat, 0 mSDtfsCounter, 117675 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5235 GetRequests, 1084 SyntacticMatches, 34 SemanticMatches, 4117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91989 ImplicationChecksByTransitivity, 245.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79452occurred in iteration=75, InterpolantAutomatonStates: 2607, 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, 2.4s SatisfiabilityAnalysisTime, 113.5s InterpolantComputationTime, 3064 NumberOfCodeBlocks, 3041 NumberOfCodeBlocksAsserted, 260 NumberOfCheckSat, 4260 ConstructedInterpolants, 265 QuantifiedInterpolants, 99375 SizeOfPredicates, 898 NumberOfNonLiveVariables, 11603 ConjunctsInSsa, 2872 ConjunctsInUnsatCore, 198 InterpolantComputations, 17 PerfectInterpolantSequences, 218/1344 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