/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-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:00:15,371 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:00:15,420 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 20:00:15,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:00:15,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:00:15,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:00:15,449 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:00:15,449 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:00:15,449 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:00:15,449 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:00:15,449 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:00:15,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:00:15,450 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:00:15,450 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:00:15,450 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:00:15,451 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:00:15,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:00:15,451 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:00:15,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:00:15,452 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:00:15,452 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:00:15,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:00:15,452 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 20:00:15,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:00:15,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:00:15,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:00:15,673 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:00:15,673 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:00:15,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2025-04-13 20:00:16,934 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e00b5a0f0/0e1d7a85f768450598f8affaadab3c2a/FLAGbcefd6f83 [2025-04-13 20:00:17,129 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:00:17,130 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2025-04-13 20:00:17,135 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e00b5a0f0/0e1d7a85f768450598f8affaadab3c2a/FLAGbcefd6f83 [2025-04-13 20:00:17,985 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e00b5a0f0/0e1d7a85f768450598f8affaadab3c2a [2025-04-13 20:00:17,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:00:17,988 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:00:17,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:00:17,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:00:17,993 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:00:17,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:00:17" (1/1) ... [2025-04-13 20:00:17,994 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92fbc46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:17, skipping insertion in model container [2025-04-13 20:00:17,994 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:00:17" (1/1) ... [2025-04-13 20:00:18,003 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:00:18,143 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-subst.wvr.c[4035,4048] [2025-04-13 20:00:18,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:00:18,165 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:00:18,200 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-subst.wvr.c[4035,4048] [2025-04-13 20:00:18,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:00:18,226 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:00:18,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18 WrapperNode [2025-04-13 20:00:18,227 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:00:18,228 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:00:18,228 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:00:18,229 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:00:18,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,278 INFO L138 Inliner]: procedures = 26, calls = 51, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 406 [2025-04-13 20:00:18,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:00:18,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:00:18,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:00:18,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:00:18,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,289 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,312 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 9, 15]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2025-04-13 20:00:18,312 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,312 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,319 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,321 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,323 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,328 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,329 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:00:18,338 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:00:18,338 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:00:18,338 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:00:18,341 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (1/1) ... [2025-04-13 20:00:18,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:00:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:00:18,364 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 20:00:18,366 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 20:00:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:00:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 20:00:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 20:00:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 20:00:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 20:00:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 20:00:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 20:00:18,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:00:18,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:00:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:00:18,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:00:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-13 20:00:18,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-13 20:00:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:00:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 20:00:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 20:00:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-13 20:00:18,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:00:18,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:00:18,384 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 20:00:18,497 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:00:18,500 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:00:18,933 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:00:18,934 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:00:18,934 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:00:19,334 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:00:19,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:00:19 BoogieIcfgContainer [2025-04-13 20:00:19,334 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:00:19,336 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:00:19,336 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:00:19,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:00:19,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:00:17" (1/3) ... [2025-04-13 20:00:19,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efeb8c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:00:19, skipping insertion in model container [2025-04-13 20:00:19,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:00:18" (2/3) ... [2025-04-13 20:00:19,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efeb8c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:00:19, skipping insertion in model container [2025-04-13 20:00:19,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:00:19" (3/3) ... [2025-04-13 20:00:19,340 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2025-04-13 20:00:19,350 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:00:19,352 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-node-subst.wvr.c that has 4 procedures, 25 locations, 27 edges, 1 initial locations, 6 loop locations, and 1 error locations. [2025-04-13 20:00:19,352 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:00:19,398 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-13 20:00:19,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 30 transitions, 81 flow [2025-04-13 20:00:19,450 INFO L116 PetriNetUnfolderBase]: 6/27 cut-off events. [2025-04-13 20:00:19,453 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:00:19,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 27 events. 6/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2025-04-13 20:00:19,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 30 transitions, 81 flow [2025-04-13 20:00:19,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 26 transitions, 70 flow [2025-04-13 20:00:19,467 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:00:19,476 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;@54a3305b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:00:19,477 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 20:00:19,491 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:00:19,491 INFO L116 PetriNetUnfolderBase]: 6/25 cut-off events. [2025-04-13 20:00:19,491 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:00:19,491 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:19,492 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:19,492 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:00:19,495 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:19,496 INFO L85 PathProgramCache]: Analyzing trace with hash 395713882, now seen corresponding path program 1 times [2025-04-13 20:00:19,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:19,501 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530530981] [2025-04-13 20:00:19,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:19,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:19,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-13 20:00:19,649 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-13 20:00:19,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:19,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:19,997 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 20:00:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:19,999 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530530981] [2025-04-13 20:00:19,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530530981] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:19,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 20:00:20,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131833851] [2025-04-13 20:00:20,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:20,005 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:00:20,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:20,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:00:20,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:00:20,025 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:00:20,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:20,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:20,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:00:20,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:20,137 INFO L116 PetriNetUnfolderBase]: 38/82 cut-off events. [2025-04-13 20:00:20,137 INFO L117 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-04-13 20:00:20,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 82 events. 38/82 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 32 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 120. Up to 82 conditions per place. [2025-04-13 20:00:20,139 INFO L140 encePairwiseOnDemand]: 27/30 looper letters, 25 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2025-04-13 20:00:20,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 126 flow [2025-04-13 20:00:20,140 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:00:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:00:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2025-04-13 20:00:20,150 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2025-04-13 20:00:20,151 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 70 flow. Second operand 3 states and 37 transitions. [2025-04-13 20:00:20,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 126 flow [2025-04-13 20:00:20,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-13 20:00:20,159 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 70 flow [2025-04-13 20:00:20,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2025-04-13 20:00:20,163 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2025-04-13 20:00:20,163 INFO L485 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 70 flow [2025-04-13 20:00:20,164 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:20,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:20,164 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:20,165 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:00:20,165 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:00:20,165 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash -351411052, now seen corresponding path program 1 times [2025-04-13 20:00:20,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:20,166 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72469932] [2025-04-13 20:00:20,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:20,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:20,188 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-13 20:00:20,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 20:00:20,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:20,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:20,433 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 20:00:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:20,433 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72469932] [2025-04-13 20:00:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72469932] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:20,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:20,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:20,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281646649] [2025-04-13 20:00:20,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:20,435 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:20,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:20,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:20,436 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:00:20,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:20,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:20,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:00:20,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:20,545 INFO L116 PetriNetUnfolderBase]: 38/83 cut-off events. [2025-04-13 20:00:20,545 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 20:00:20,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 83 events. 38/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 32 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 171. Up to 82 conditions per place. [2025-04-13 20:00:20,547 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 25 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2025-04-13 20:00:20,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 128 flow [2025-04-13 20:00:20,548 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2025-04-13 20:00:20,548 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-04-13 20:00:20,548 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 70 flow. Second operand 4 states and 40 transitions. [2025-04-13 20:00:20,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 128 flow [2025-04-13 20:00:20,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-13 20:00:20,549 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 80 flow [2025-04-13 20:00:20,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2025-04-13 20:00:20,550 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2025-04-13 20:00:20,550 INFO L485 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 80 flow [2025-04-13 20:00:20,550 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:20,550 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:20,550 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:20,550 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:00:20,550 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:00:20,551 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:20,551 INFO L85 PathProgramCache]: Analyzing trace with hash -55807966, now seen corresponding path program 1 times [2025-04-13 20:00:20,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:20,551 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509744645] [2025-04-13 20:00:20,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:20,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:20,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-13 20:00:20,585 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 20:00:20,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:20,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:20,705 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 20:00:20,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:20,706 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509744645] [2025-04-13 20:00:20,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509744645] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:20,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:20,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:20,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082978531] [2025-04-13 20:00:20,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:20,706 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:20,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:20,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:20,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:20,707 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:00:20,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 20:00:20,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:20,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:00:20,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:20,802 INFO L116 PetriNetUnfolderBase]: 38/84 cut-off events. [2025-04-13 20:00:20,802 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:00:20,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 84 events. 38/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 32 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 171. Up to 82 conditions per place. [2025-04-13 20:00:20,803 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 25 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2025-04-13 20:00:20,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 140 flow [2025-04-13 20:00:20,803 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2025-04-13 20:00:20,804 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3416666666666667 [2025-04-13 20:00:20,804 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 80 flow. Second operand 4 states and 41 transitions. [2025-04-13 20:00:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 140 flow [2025-04-13 20:00:20,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 134 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 20:00:20,805 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 92 flow [2025-04-13 20:00:20,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2025-04-13 20:00:20,806 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2025-04-13 20:00:20,806 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 92 flow [2025-04-13 20:00:20,806 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 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 20:00:20,806 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:20,806 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:20,806 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:00:20,806 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:00:20,806 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash 977231474, now seen corresponding path program 1 times [2025-04-13 20:00:20,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:20,807 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863580156] [2025-04-13 20:00:20,807 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:20,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:20,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-04-13 20:00:20,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 20:00:20,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:20,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:20,979 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 20:00:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:20,981 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863580156] [2025-04-13 20:00:20,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863580156] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:20,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:20,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290844316] [2025-04-13 20:00:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:20,981 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:20,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:20,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:20,982 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:00:20,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:20,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:20,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:00:20,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:21,075 INFO L116 PetriNetUnfolderBase]: 38/85 cut-off events. [2025-04-13 20:00:21,075 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-13 20:00:21,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 85 events. 38/85 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 32 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 176. Up to 84 conditions per place. [2025-04-13 20:00:21,076 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 27 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2025-04-13 20:00:21,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 154 flow [2025-04-13 20:00:21,077 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2025-04-13 20:00:21,077 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-04-13 20:00:21,077 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 92 flow. Second operand 4 states and 40 transitions. [2025-04-13 20:00:21,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 154 flow [2025-04-13 20:00:21,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 20:00:21,078 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 102 flow [2025-04-13 20:00:21,078 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-04-13 20:00:21,079 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2025-04-13 20:00:21,079 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 102 flow [2025-04-13 20:00:21,079 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:21,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:21,079 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:21,079 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:00:21,079 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:00:21,080 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:21,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1002046910, now seen corresponding path program 1 times [2025-04-13 20:00:21,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:21,080 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977100257] [2025-04-13 20:00:21,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:21,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:21,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-13 20:00:21,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-13 20:00:21,113 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:21,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:21,227 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 20:00:21,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:21,227 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977100257] [2025-04-13 20:00:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977100257] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:21,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:21,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:21,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767818505] [2025-04-13 20:00:21,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:21,228 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:21,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:21,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:21,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:21,229 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:00:21,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:21,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:21,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:00:21,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:21,313 INFO L116 PetriNetUnfolderBase]: 38/86 cut-off events. [2025-04-13 20:00:21,314 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:00:21,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 86 events. 38/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 32 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 182. Up to 85 conditions per place. [2025-04-13 20:00:21,317 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2025-04-13 20:00:21,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 166 flow [2025-04-13 20:00:21,319 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2025-04-13 20:00:21,319 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-04-13 20:00:21,319 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 102 flow. Second operand 4 states and 40 transitions. [2025-04-13 20:00:21,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 166 flow [2025-04-13 20:00:21,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 160 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 20:00:21,321 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 110 flow [2025-04-13 20:00:21,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2025-04-13 20:00:21,321 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2025-04-13 20:00:21,321 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 110 flow [2025-04-13 20:00:21,321 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:21,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:21,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:21,322 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 20:00:21,322 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:00:21,322 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:21,322 INFO L85 PathProgramCache]: Analyzing trace with hash 565631141, now seen corresponding path program 1 times [2025-04-13 20:00:21,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:21,322 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692766060] [2025-04-13 20:00:21,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:21,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:21,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-04-13 20:00:21,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-04-13 20:00:21,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:21,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-04-13 20:00:21,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:21,472 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692766060] [2025-04-13 20:00:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692766060] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:00:21,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:00:21,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 20:00:21,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290627785] [2025-04-13 20:00:21,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:00:21,472 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:00:21,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:00:21,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:00:21,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:00:21,473 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:00:21,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:21,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:00:21,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:00:21,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:00:21,555 INFO L116 PetriNetUnfolderBase]: 38/87 cut-off events. [2025-04-13 20:00:21,555 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-13 20:00:21,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 87 events. 38/87 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 137 event pairs, 32 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 187. Up to 86 conditions per place. [2025-04-13 20:00:21,556 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 29 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2025-04-13 20:00:21,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 176 flow [2025-04-13 20:00:21,557 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:00:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:00:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2025-04-13 20:00:21,558 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-04-13 20:00:21,558 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 110 flow. Second operand 4 states and 40 transitions. [2025-04-13 20:00:21,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 176 flow [2025-04-13 20:00:21,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 170 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 20:00:21,560 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 118 flow [2025-04-13 20:00:21,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2025-04-13 20:00:21,561 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2025-04-13 20:00:21,561 INFO L485 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 118 flow [2025-04-13 20:00:21,561 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:00:21,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:00:21,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:00:21,562 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 20:00:21,562 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:00:21,562 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:00:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1834315460, now seen corresponding path program 1 times [2025-04-13 20:00:21,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:00:21,562 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102362560] [2025-04-13 20:00:21,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:21,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:00:21,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:00:21,870 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:00:21,870 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:21,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-13 20:00:24,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:00:24,437 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102362560] [2025-04-13 20:00:24,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102362560] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:00:24,437 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718647671] [2025-04-13 20:00:24,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:00:24,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:00:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:00:24,439 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 20:00:24,440 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 20:00:24,532 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-04-13 20:00:24,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:00:24,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:00:24,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:00:24,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-13 20:00:24,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:00:26,943 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:00:26,944 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 755 treesize of output 2095 [2025-04-13 20:03:25,006 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 20:03:25,006 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:03:25,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718647671] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:03:25,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:03:25,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2025-04-13 20:03:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456921771] [2025-04-13 20:03:25,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:03:25,007 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:03:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:03:25,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:03:25,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:03:25,007 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:03:25,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:03:25,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:03:25,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:03:25,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:03:25,769 INFO L116 PetriNetUnfolderBase]: 39/105 cut-off events. [2025-04-13 20:03:25,769 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-13 20:03:25,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 105 events. 39/105 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 283 event pairs, 7 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 227. Up to 41 conditions per place. [2025-04-13 20:03:25,770 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 42 selfloop transitions, 2 changer transitions 7/51 dead transitions. [2025-04-13 20:03:25,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 267 flow [2025-04-13 20:03:25,771 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:03:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:03:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2025-04-13 20:03:25,771 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2025-04-13 20:03:25,771 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 118 flow. Second operand 5 states and 61 transitions. [2025-04-13 20:03:25,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 267 flow [2025-04-13 20:03:25,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 261 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 20:03:25,773 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 127 flow [2025-04-13 20:03:25,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2025-04-13 20:03:25,773 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2025-04-13 20:03:25,773 INFO L485 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 127 flow [2025-04-13 20:03:25,776 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:03:25,776 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:03:25,776 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:03:25,786 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 20:03:25,976 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:03:25,977 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:03:25,977 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:03:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash 750395152, now seen corresponding path program 2 times [2025-04-13 20:03:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:03:25,977 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780470816] [2025-04-13 20:03:25,977 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:03:25,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:03:25,992 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:03:26,052 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 26 statements. [2025-04-13 20:03:26,052 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:03:26,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:03:27,185 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 20:03:27,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:03:27,185 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780470816] [2025-04-13 20:03:27,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780470816] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:03:27,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:03:27,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:03:27,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724718004] [2025-04-13 20:03:27,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:03:27,186 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:03:27,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:03:27,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:03:27,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:03:27,186 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:03:27,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:03:27,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:03:27,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:03:27,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:03:27,384 INFO L116 PetriNetUnfolderBase]: 35/109 cut-off events. [2025-04-13 20:03:27,384 INFO L117 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2025-04-13 20:03:27,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 109 events. 35/109 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 306 event pairs, 10 based on Foata normal form. 1/109 useless extension candidates. Maximal degree in co-relation 290. Up to 48 conditions per place. [2025-04-13 20:03:27,384 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 41 selfloop transitions, 3 changer transitions 5/49 dead transitions. [2025-04-13 20:03:27,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 275 flow [2025-04-13 20:03:27,385 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:03:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:03:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2025-04-13 20:03:27,385 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2025-04-13 20:03:27,385 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 127 flow. Second operand 5 states and 58 transitions. [2025-04-13 20:03:27,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 275 flow [2025-04-13 20:03:27,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 268 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-13 20:03:27,386 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 144 flow [2025-04-13 20:03:27,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2025-04-13 20:03:27,387 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2025-04-13 20:03:27,387 INFO L485 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 144 flow [2025-04-13 20:03:27,387 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:03:27,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:03:27,387 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:03:27,387 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-13 20:03:27,387 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:03:27,387 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:03:27,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1736025368, now seen corresponding path program 3 times [2025-04-13 20:03:27,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:03:27,388 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212666013] [2025-04-13 20:03:27,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:03:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:03:27,398 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:03:27,466 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 20 of 26 statements. [2025-04-13 20:03:27,466 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:03:27,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:03:28,200 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 20:03:28,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:03:28,200 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212666013] [2025-04-13 20:03:28,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212666013] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:03:28,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:03:28,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:03:28,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491608286] [2025-04-13 20:03:28,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:03:28,201 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:03:28,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:03:28,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:03:28,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:03:28,201 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:03:28,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:03:28,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:03:28,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:03:28,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:03:28,388 INFO L116 PetriNetUnfolderBase]: 35/112 cut-off events. [2025-04-13 20:03:28,388 INFO L117 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2025-04-13 20:03:28,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 112 events. 35/112 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 351 event pairs, 8 based on Foata normal form. 1/112 useless extension candidates. Maximal degree in co-relation 348. Up to 50 conditions per place. [2025-04-13 20:03:28,389 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 40 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2025-04-13 20:03:28,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 51 transitions, 307 flow [2025-04-13 20:03:28,391 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:03:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:03:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2025-04-13 20:03:28,391 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2025-04-13 20:03:28,391 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 144 flow. Second operand 5 states and 59 transitions. [2025-04-13 20:03:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 51 transitions, 307 flow [2025-04-13 20:03:28,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 296 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-04-13 20:03:28,393 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 151 flow [2025-04-13 20:03:28,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2025-04-13 20:03:28,393 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2025-04-13 20:03:28,393 INFO L485 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 151 flow [2025-04-13 20:03:28,394 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:03:28,394 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:03:28,394 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:03:28,394 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-04-13 20:03:28,394 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:03:28,394 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:03:28,394 INFO L85 PathProgramCache]: Analyzing trace with hash -459833916, now seen corresponding path program 4 times [2025-04-13 20:03:28,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:03:28,394 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364260736] [2025-04-13 20:03:28,394 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:03:28,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:03:28,408 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:03:28,442 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 20:03:28,442 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:03:28,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:03:29,468 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 20:03:29,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:03:29,469 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364260736] [2025-04-13 20:03:29,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364260736] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:03:29,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:03:29,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:03:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222469134] [2025-04-13 20:03:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:03:29,469 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:03:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:03:29,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:03:29,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:03:29,470 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 30 [2025-04-13 20:03:29,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:03:29,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:03:29,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 30 [2025-04-13 20:03:29,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:03:29,640 INFO L116 PetriNetUnfolderBase]: 30/96 cut-off events. [2025-04-13 20:03:29,640 INFO L117 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2025-04-13 20:03:29,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 96 events. 30/96 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 222 event pairs, 15 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 327. Up to 64 conditions per place. [2025-04-13 20:03:29,641 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 40 selfloop transitions, 3 changer transitions 7/50 dead transitions. [2025-04-13 20:03:29,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 319 flow [2025-04-13 20:03:29,643 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 20:03:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 20:03:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2025-04-13 20:03:29,643 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38 [2025-04-13 20:03:29,644 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 151 flow. Second operand 5 states and 57 transitions. [2025-04-13 20:03:29,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 319 flow [2025-04-13 20:03:29,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 300 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-04-13 20:03:29,645 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 158 flow [2025-04-13 20:03:29,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2025-04-13 20:03:29,648 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-04-13 20:03:29,648 INFO L485 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 158 flow [2025-04-13 20:03:29,649 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:03:29,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:03:29,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:03:29,649 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-04-13 20:03:29,649 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:03:29,649 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:03:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -938951966, now seen corresponding path program 5 times [2025-04-13 20:03:29,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:03:29,649 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763394489] [2025-04-13 20:03:29,649 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:03:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:03:29,660 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:03:29,795 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:03:29,796 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:03:29,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:03:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-04-13 20:03:31,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:03:31,018 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763394489] [2025-04-13 20:03:31,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763394489] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:03:31,018 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243252661] [2025-04-13 20:03:31,018 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:03:31,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:03:31,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:03:31,022 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 20:03:31,023 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 20:03:31,107 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-04-13 20:03:31,150 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-13 20:03:31,150 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:03:31,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:03:31,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-04-13 20:03:31,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:03:34,560 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:03:34,564 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 1066 treesize of output 2230 [2025-04-13 20:03:34,629 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-13 20:03:34,630 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 362 treesize of output 336 [2025-04-13 20:05:08,811 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 101 [2025-04-13 20:05:08,812 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2025-04-13 20:05:08,812 WARN L310 FreeRefinementEngine]: Global settings require throwing the following exception [2025-04-13 20:05:08,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-13 20:05:09,013 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,SelfDestructingSolverStorable10 [2025-04-13 20:05:09,014 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:583) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:726) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:142) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:223) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:99) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:305) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:241) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:191) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:223) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:99) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:305) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:241) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:191) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:99) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:305) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:241) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:191) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:99) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:305) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:56) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:195) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:427) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 76 more [2025-04-13 20:05:09,019 INFO L158 Benchmark]: Toolchain (without parser) took 291031.12ms. Allocated memory was 155.2MB in the beginning and 629.1MB in the end (delta: 474.0MB). Free memory was 109.2MB in the beginning and 336.5MB in the end (delta: -227.3MB). Peak memory consumption was 386.2MB. Max. memory is 8.0GB. [2025-04-13 20:05:09,019 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 159.4MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:05:09,019 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.13ms. Allocated memory is still 155.2MB. Free memory was 109.2MB in the beginning and 93.2MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2025-04-13 20:05:09,020 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.40ms. Allocated memory is still 155.2MB. Free memory was 93.2MB in the beginning and 89.9MB in the end (delta: 3.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:05:09,020 INFO L158 Benchmark]: Boogie Preprocessor took 59.00ms. Allocated memory is still 155.2MB. Free memory was 89.9MB in the beginning and 85.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:05:09,020 INFO L158 Benchmark]: RCFGBuilder took 996.26ms. Allocated memory is still 155.2MB. Free memory was 85.7MB in the beginning and 77.2MB in the end (delta: 8.5MB). Peak memory consumption was 70.8MB. Max. memory is 8.0GB. [2025-04-13 20:05:09,020 INFO L158 Benchmark]: TraceAbstraction took 289682.58ms. Allocated memory was 155.2MB in the beginning and 629.1MB in the end (delta: 474.0MB). Free memory was 77.2MB in the beginning and 336.5MB in the end (delta: -259.3MB). Peak memory consumption was 354.7MB. Max. memory is 8.0GB. [2025-04-13 20:05:09,021 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 159.4MB. Free memory is still 87.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 239.13ms. Allocated memory is still 155.2MB. Free memory was 109.2MB in the beginning and 93.2MB in the end (delta: 15.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 50.40ms. Allocated memory is still 155.2MB. Free memory was 93.2MB in the beginning and 89.9MB in the end (delta: 3.4MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 59.00ms. Allocated memory is still 155.2MB. Free memory was 89.9MB in the beginning and 85.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 996.26ms. Allocated memory is still 155.2MB. Free memory was 85.7MB in the beginning and 77.2MB in the end (delta: 8.5MB). Peak memory consumption was 70.8MB. Max. memory is 8.0GB. * TraceAbstraction took 289682.58ms. Allocated memory was 155.2MB in the beginning and 629.1MB in the end (delta: 474.0MB). Free memory was 77.2MB in the beginning and 336.5MB in the end (delta: -259.3MB). Peak memory consumption was 354.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...