/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/chl-node-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:00:18,553 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:00:18,597 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 20:00:18,600 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:00:18,600 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:00:18,622 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:00:18,623 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:00:18,623 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:00:18,623 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:00:18,623 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:00:18,624 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:00:18,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:00:18,624 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:00:18,624 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:00:18,624 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:00:18,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:00:18,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:00:18,624 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:00:18,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:00:18,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:00:18,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:00:18,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:00:18,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:00:18,625 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:00:18,625 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:00:18,626 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:00:18,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:00:18,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:00:18,627 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:00:18,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:00:18,627 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:00:18,627 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:00:18,627 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:00:18,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:00:18,627 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:00:18,627 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:00:18,627 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:00:18,627 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 20:00:18,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:00:18,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:00:18,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:00:18,843 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:00:18,845 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:00:18,846 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2025-04-13 20:00:20,103 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f11929fd9/d8855f4920eb4219b45d32f81a33da69/FLAG0f3951221 [2025-04-13 20:00:20,280 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:00:20,280 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2025-04-13 20:00:20,285 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f11929fd9/d8855f4920eb4219b45d32f81a33da69/FLAG0f3951221 [2025-04-13 20:00:21,105 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f11929fd9/d8855f4920eb4219b45d32f81a33da69 [2025-04-13 20:00:21,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:00:21,108 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:00:21,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:00:21,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:00:21,111 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:00:21,112 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d42ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21, skipping insertion in model container [2025-04-13 20:00:21,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,126 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:00:21,281 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/chl-node-symm.wvr.c[3331,3344] [2025-04-13 20:00:21,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:00:21,314 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:00:21,345 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/chl-node-symm.wvr.c[3331,3344] [2025-04-13 20:00:21,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:00:21,360 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:00:21,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21 WrapperNode [2025-04-13 20:00:21,361 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:00:21,361 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:00:21,361 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:00:21,361 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:00:21,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,404 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 277 [2025-04-13 20:00:21,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:00:21,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:00:21,405 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:00:21,405 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:00:21,410 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,410 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,413 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,433 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 10, 6]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2025-04-13 20:00:21,434 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,434 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,439 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,439 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,442 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,443 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,444 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:00:21,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:00:21,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:00:21,457 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:00:21,457 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (1/1) ... [2025-04-13 20:00:21,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:00:21,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:00:21,482 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 20:00:21,484 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 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:00:21,498 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:00:21,498 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:00:21,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 20:00:21,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 20:00:21,499 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 20:00:21,570 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:00:21,572 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:00:21,887 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:00:21,888 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:00:21,888 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:00:22,195 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:00:22,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:00:22 BoogieIcfgContainer [2025-04-13 20:00:22,196 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:00:22,197 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:00:22,197 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:00:22,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:00:22,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:00:21" (1/3) ... [2025-04-13 20:00:22,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b065d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:00:22, skipping insertion in model container [2025-04-13 20:00:22,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:21" (2/3) ... [2025-04-13 20:00:22,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b065d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:00:22, skipping insertion in model container [2025-04-13 20:00:22,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:00:22" (3/3) ... [2025-04-13 20:00:22,203 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2025-04-13 20:00:22,213 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:00:22,214 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-node-symm.wvr.c that has 3 procedures, 18 locations, 19 edges, 1 initial locations, 4 loop locations, and 1 error locations. [2025-04-13 20:00:22,214 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:00:22,279 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-13 20:00:22,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 56 flow [2025-04-13 20:00:22,324 INFO L116 PetriNetUnfolderBase]: 4/19 cut-off events. [2025-04-13 20:00:22,325 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:00:22,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 4/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2025-04-13 20:00:22,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 21 transitions, 56 flow [2025-04-13 20:00:22,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 18 transitions, 48 flow [2025-04-13 20:00:22,336 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:00:22,348 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;@44d00a44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:00:22,348 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 20:00:22,357 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:00:22,357 INFO L116 PetriNetUnfolderBase]: 4/17 cut-off events. [2025-04-13 20:00:22,357 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:00:22,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:22,358 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:22,358 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 20:00:22,362 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:22,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1106102824, now seen corresponding path program 1 times [2025-04-13 20:00:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:22,367 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181083702] [2025-04-13 20:00:22,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:22,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:22,425 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 20:00:22,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:00:22,485 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:22,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:22,708 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 20:00:22,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:22,708 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181083702] [2025-04-13 20:00:22,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181083702] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:22,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:22,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 20:00:22,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174669962] [2025-04-13 20:00:22,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:22,716 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:00:22,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:22,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:00:22,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:00:22,735 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 20:00:22,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:22,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:22,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 20:00:22,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:22,797 INFO L116 PetriNetUnfolderBase]: 12/34 cut-off events. [2025-04-13 20:00:22,797 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-13 20:00:22,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 34 events. 12/34 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 8 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 40. Up to 34 conditions per place. [2025-04-13 20:00:22,798 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 17 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2025-04-13 20:00:22,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 88 flow [2025-04-13 20:00:22,800 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:00:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:00:22,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2025-04-13 20:00:22,807 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2025-04-13 20:00:22,808 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 48 flow. Second operand 3 states and 26 transitions. [2025-04-13 20:00:22,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 88 flow [2025-04-13 20:00:22,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 20:00:22,814 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 52 flow [2025-04-13 20:00:22,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2025-04-13 20:00:22,819 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-04-13 20:00:22,819 INFO L485 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 52 flow [2025-04-13 20:00:22,820 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:22,820 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:22,820 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:22,820 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:00:22,820 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 20:00:22,821 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash -103848455, now seen corresponding path program 1 times [2025-04-13 20:00:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:22,821 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991211291] [2025-04-13 20:00:22,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:22,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-13 20:00:22,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 20:00:22,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:22,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:22,993 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 20:00:22,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:22,993 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991211291] [2025-04-13 20:00:22,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991211291] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:22,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:22,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:22,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990560451] [2025-04-13 20:00:22,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:22,994 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:22,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:22,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:22,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:22,995 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 20:00:22,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 52 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 20:00:22,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:22,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 20:00:22,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:23,061 INFO L116 PetriNetUnfolderBase]: 12/35 cut-off events. [2025-04-13 20:00:23,061 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 20:00:23,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 35 events. 12/35 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 8 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 71. Up to 33 conditions per place. [2025-04-13 20:00:23,062 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 16 selfloop transitions, 4 changer transitions 0/20 dead transitions. [2025-04-13 20:00:23,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 20 transitions, 94 flow [2025-04-13 20:00:23,063 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 29 transitions. [2025-04-13 20:00:23,064 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2025-04-13 20:00:23,064 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 52 flow. Second operand 4 states and 29 transitions. [2025-04-13 20:00:23,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 20 transitions, 94 flow [2025-04-13 20:00:23,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 20 transitions, 90 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-13 20:00:23,065 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 66 flow [2025-04-13 20:00:23,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2025-04-13 20:00:23,065 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2025-04-13 20:00:23,065 INFO L485 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 66 flow [2025-04-13 20:00:23,065 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 20:00:23,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:23,065 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:23,066 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:00:23,066 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 20:00:23,066 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2090748883, now seen corresponding path program 1 times [2025-04-13 20:00:23,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:23,066 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306239889] [2025-04-13 20:00:23,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:23,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:23,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-13 20:00:23,103 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-13 20:00:23,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:23,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:00:23,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:23,204 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306239889] [2025-04-13 20:00:23,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306239889] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:23,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:23,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:23,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789285350] [2025-04-13 20:00:23,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:23,204 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:23,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:23,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:23,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:23,205 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 20:00:23,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:23,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:23,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 20:00:23,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:23,261 INFO L116 PetriNetUnfolderBase]: 12/36 cut-off events. [2025-04-13 20:00:23,261 INFO L117 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-04-13 20:00:23,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 36 events. 12/36 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 8 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 71. Up to 35 conditions per place. [2025-04-13 20:00:23,261 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 18 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2025-04-13 20:00:23,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 110 flow [2025-04-13 20:00:23,262 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2025-04-13 20:00:23,263 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-04-13 20:00:23,263 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 66 flow. Second operand 4 states and 28 transitions. [2025-04-13 20:00:23,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 110 flow [2025-04-13 20:00:23,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:00:23,264 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 79 flow [2025-04-13 20:00:23,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=79, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2025-04-13 20:00:23,264 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2025-04-13 20:00:23,264 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 79 flow [2025-04-13 20:00:23,264 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:23,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:23,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:23,264 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:00:23,264 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 20:00:23,265 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash -586217470, now seen corresponding path program 1 times [2025-04-13 20:00:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:23,265 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706503393] [2025-04-13 20:00:23,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:23,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:23,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-13 20:00:23,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 20:00:23,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:23,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-13 20:00:23,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:23,444 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706503393] [2025-04-13 20:00:23,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706503393] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:00:23,445 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335699272] [2025-04-13 20:00:23,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:23,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:00:23,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:00:23,447 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 20:00:23,449 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 20:00:23,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-13 20:00:23,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 20:00:23,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:23,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:23,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 20:00:23,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:00:23,591 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 20:00:23,592 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:00:23,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335699272] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:23,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:00:23,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2025-04-13 20:00:23,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721797085] [2025-04-13 20:00:23,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:23,592 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:23,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:23,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:23,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:00:23,594 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 20:00:23,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:23,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:23,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 20:00:23,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:23,644 INFO L116 PetriNetUnfolderBase]: 12/37 cut-off events. [2025-04-13 20:00:23,644 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 20:00:23,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 37 events. 12/37 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 8 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 78. Up to 36 conditions per place. [2025-04-13 20:00:23,645 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2025-04-13 20:00:23,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 125 flow [2025-04-13 20:00:23,646 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2025-04-13 20:00:23,647 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-04-13 20:00:23,647 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 79 flow. Second operand 4 states and 28 transitions. [2025-04-13 20:00:23,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 125 flow [2025-04-13 20:00:23,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 119 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 20:00:23,648 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 87 flow [2025-04-13 20:00:23,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=87, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2025-04-13 20:00:23,648 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2025-04-13 20:00:23,649 INFO L485 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 87 flow [2025-04-13 20:00:23,649 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:23,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:23,649 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 20:00:23,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 20:00:23,854 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:00:23,854 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 20:00:23,856 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1742957108, now seen corresponding path program 1 times [2025-04-13 20:00:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:23,856 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430448285] [2025-04-13 20:00:23,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:23,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:23,875 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:00:23,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:00:23,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:23,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-13 20:00:24,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:24,786 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430448285] [2025-04-13 20:00:24,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430448285] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:24,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:24,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:24,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883035474] [2025-04-13 20:00:24,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:24,787 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:24,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:24,787 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:24,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:24,788 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 20:00:24,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:24,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:24,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 20:00:24,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:24,874 INFO L116 PetriNetUnfolderBase]: 11/40 cut-off events. [2025-04-13 20:00:24,874 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-13 20:00:24,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 40 events. 11/40 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 51 event pairs, 1 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 87. Up to 21 conditions per place. [2025-04-13 20:00:24,875 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 22 selfloop transitions, 1 changer transitions 6/29 dead transitions. [2025-04-13 20:00:24,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 162 flow [2025-04-13 20:00:24,875 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:24,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2025-04-13 20:00:24,876 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2025-04-13 20:00:24,876 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 87 flow. Second operand 4 states and 34 transitions. [2025-04-13 20:00:24,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 162 flow [2025-04-13 20:00:24,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 156 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 20:00:24,877 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 88 flow [2025-04-13 20:00:24,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2025-04-13 20:00:24,878 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2025-04-13 20:00:24,878 INFO L485 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 88 flow [2025-04-13 20:00:24,878 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:24,878 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:24,878 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 20:00:24,878 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 20:00:24,878 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 20:00:24,879 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:24,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1577022412, now seen corresponding path program 2 times [2025-04-13 20:00:24,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:24,879 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190546849] [2025-04-13 20:00:24,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:00:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:24,892 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:00:24,911 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 18 statements. [2025-04-13 20:00:24,911 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:00:24,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-13 20:00:25,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:25,488 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190546849] [2025-04-13 20:00:25,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190546849] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:25,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:25,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:25,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104704254] [2025-04-13 20:00:25,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:25,489 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:25,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:25,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:25,489 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 21 [2025-04-13 20:00:25,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:25,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:25,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 21 [2025-04-13 20:00:25,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:25,563 INFO L116 PetriNetUnfolderBase]: 9/33 cut-off events. [2025-04-13 20:00:25,563 INFO L117 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-04-13 20:00:25,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 33 events. 9/33 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 3 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 94. Up to 26 conditions per place. [2025-04-13 20:00:25,563 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2025-04-13 20:00:25,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 146 flow [2025-04-13 20:00:25,564 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 30 transitions. [2025-04-13 20:00:25,564 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-04-13 20:00:25,564 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 88 flow. Second operand 4 states and 30 transitions. [2025-04-13 20:00:25,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 146 flow [2025-04-13 20:00:25,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:00:25,565 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2025-04-13 20:00:25,565 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=28, 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=4, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2025-04-13 20:00:25,565 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2025-04-13 20:00:25,565 INFO L485 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2025-04-13 20:00:25,565 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:25,567 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-13 20:00:25,567 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-13 20:00:25,567 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 20:00:25,568 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 20:00:25,568 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2025-04-13 20:00:25,570 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 20:00:25,570 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 20:00:25,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 08:00:25 BasicIcfg [2025-04-13 20:00:25,573 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 20:00:25,573 INFO L158 Benchmark]: Toolchain (without parser) took 4465.73ms. Allocated memory was 142.6MB in the beginning and 352.3MB in the end (delta: 209.7MB). Free memory was 99.0MB in the beginning and 249.5MB in the end (delta: -150.5MB). Peak memory consumption was 59.6MB. Max. memory is 8.0GB. [2025-04-13 20:00:25,573 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:00:25,573 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.36ms. Allocated memory is still 142.6MB. Free memory was 99.0MB in the beginning and 83.2MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2025-04-13 20:00:25,574 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.09ms. Allocated memory is still 142.6MB. Free memory was 83.2MB in the beginning and 80.5MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:00:25,574 INFO L158 Benchmark]: Boogie Preprocessor took 51.39ms. Allocated memory is still 142.6MB. Free memory was 80.5MB in the beginning and 77.8MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:00:25,574 INFO L158 Benchmark]: RCFGBuilder took 739.28ms. Allocated memory is still 142.6MB. Free memory was 77.8MB in the beginning and 35.4MB in the end (delta: 42.4MB). Peak memory consumption was 61.2MB. Max. memory is 8.0GB. [2025-04-13 20:00:25,574 INFO L158 Benchmark]: TraceAbstraction took 3375.81ms. Allocated memory was 142.6MB in the beginning and 352.3MB in the end (delta: 209.7MB). Free memory was 34.7MB in the beginning and 249.5MB in the end (delta: -214.8MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:00:25,575 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 252.36ms. Allocated memory is still 142.6MB. Free memory was 99.0MB in the beginning and 83.2MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 43.09ms. Allocated memory is still 142.6MB. Free memory was 83.2MB in the beginning and 80.5MB in the end (delta: 2.7MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 51.39ms. Allocated memory is still 142.6MB. Free memory was 80.5MB in the beginning and 77.8MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 739.28ms. Allocated memory is still 142.6MB. Free memory was 77.8MB in the beginning and 35.4MB in the end (delta: 42.4MB). Peak memory consumption was 61.2MB. Max. memory is 8.0GB. * TraceAbstraction took 3375.81ms. Allocated memory was 142.6MB in the beginning and 352.3MB in the end (delta: 209.7MB). Free memory was 34.7MB in the beginning and 249.5MB in the end (delta: -214.8MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 93]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 24 locations, 27 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: 3.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 56 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 56 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 252 IncrementalHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 252 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=5, InterpolantAutomatonStates: 23, 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 115 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 694 SizeOfPredicates, 2 NumberOfNonLiveVariables, 256 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 16/17 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-13 20:00:25,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...