/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/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:37:18,471 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:37:18,522 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 19:37:18,529 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:37:18,529 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:37:18,549 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:37:18,550 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:37:18,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:37:18,550 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:37:18,550 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:37:18,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:37:18,550 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:37:18,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:37:18,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:37:18,552 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:37:18,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:37:18,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:37:18,552 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:37:18,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:37:18,552 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:37:18,553 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:37:18,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:18,553 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:18,554 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:37:18,554 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:37:18,554 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 19:37:18,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:37:18,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:37:18,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:37:18,788 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:37:18,788 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:37:18,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2025-04-13 19:37:20,123 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c18943d5/db0c28f6089d42488ed23049026fcd5b/FLAG9d13794b8 [2025-04-13 19:37:20,348 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:37:20,348 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2025-04-13 19:37:20,360 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c18943d5/db0c28f6089d42488ed23049026fcd5b/FLAG9d13794b8 [2025-04-13 19:37:21,174 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c18943d5/db0c28f6089d42488ed23049026fcd5b [2025-04-13 19:37:21,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:37:21,177 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:37:21,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:37:21,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:37:21,182 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:37:21,183 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,183 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48270e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21, skipping insertion in model container [2025-04-13 19:37:21,184 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,214 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:37:21,379 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2025-04-13 19:37:21,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:37:21,511 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:37:21,524 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2025-04-13 19:37:21,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:37:21,579 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:37:21,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21 WrapperNode [2025-04-13 19:37:21,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:37:21,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:37:21,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:37:21,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:37:21,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,610 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2025-04-13 19:37:21,610 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:37:21,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:37:21,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:37:21,612 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:37:21,617 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,622 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,634 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-13 19:37:21,634 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,637 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,638 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,639 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,640 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,642 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:37:21,643 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:37:21,643 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:37:21,643 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:37:21,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (1/1) ... [2025-04-13 19:37:21,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:37:21,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:37:21,669 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 19:37:21,672 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 19:37:21,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 19:37:21,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:37:21,688 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-04-13 19:37:21,688 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-04-13 19:37:21,688 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-04-13 19:37:21,688 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-04-13 19:37:21,688 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2025-04-13 19:37:21,688 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2025-04-13 19:37:21,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:37:21,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 19:37:21,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:37:21,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:37:21,689 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 19:37:21,775 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:37:21,776 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:37:21,897 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:37:21,897 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:37:21,898 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:37:22,005 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 19:37:22,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:37:22 BoogieIcfgContainer [2025-04-13 19:37:22,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:37:22,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:37:22,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:37:22,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:37:22,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:37:21" (1/3) ... [2025-04-13 19:37:22,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea2b53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:37:22, skipping insertion in model container [2025-04-13 19:37:22,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:37:21" (2/3) ... [2025-04-13 19:37:22,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea2b53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:37:22, skipping insertion in model container [2025-04-13 19:37:22,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:37:22" (3/3) ... [2025-04-13 19:37:22,014 INFO L128 eAbstractionObserver]: Analyzing ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2025-04-13 19:37:22,023 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:37:22,024 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe025_pso.oepc_pso.opt_tso.oepc_tso.opt.i that has 4 procedures, 36 locations, 32 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-13 19:37:22,024 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:37:22,050 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:37:22,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 35 transitions, 82 flow [2025-04-13 19:37:22,099 INFO L116 PetriNetUnfolderBase]: 0/32 cut-off events. [2025-04-13 19:37:22,100 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:37:22,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 32 events. 0/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2025-04-13 19:37:22,102 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 35 transitions, 82 flow [2025-04-13 19:37:22,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2025-04-13 19:37:22,109 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:37:22,116 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;@1bcdd573, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:37:22,116 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 19:37:22,123 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:37:22,123 INFO L116 PetriNetUnfolderBase]: 0/29 cut-off events. [2025-04-13 19:37:22,123 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:37:22,123 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:22,124 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:37:22,124 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 19:37:22,127 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1021190667, now seen corresponding path program 1 times [2025-04-13 19:37:22,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:22,135 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430468117] [2025-04-13 19:37:22,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:22,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:22,192 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 19:37:22,222 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 19:37:22,222 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:22,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:22,465 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 19:37:22,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:22,465 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430468117] [2025-04-13 19:37:22,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430468117] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:22,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:22,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:37:22,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899740055] [2025-04-13 19:37:22,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:22,471 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 19:37:22,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:22,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 19:37:22,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 19:37:22,503 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2025-04-13 19:37:22,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:22,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:22,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2025-04-13 19:37:22,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:22,651 INFO L116 PetriNetUnfolderBase]: 291/540 cut-off events. [2025-04-13 19:37:22,651 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-13 19:37:22,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 540 events. 291/540 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2805 event pairs, 58 based on Foata normal form. 27/558 useless extension candidates. Maximal degree in co-relation 1035. Up to 236 conditions per place. [2025-04-13 19:37:22,662 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 25 selfloop transitions, 5 changer transitions 1/46 dead transitions. [2025-04-13 19:37:22,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 169 flow [2025-04-13 19:37:22,663 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 19:37:22,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 19:37:22,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2025-04-13 19:37:22,672 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.75 [2025-04-13 19:37:22,673 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 4 states and 105 transitions. [2025-04-13 19:37:22,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 169 flow [2025-04-13 19:37:22,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 46 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-13 19:37:22,678 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 102 flow [2025-04-13 19:37:22,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, 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=43, PETRI_TRANSITIONS=34} [2025-04-13 19:37:22,681 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2025-04-13 19:37:22,681 INFO L485 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 102 flow [2025-04-13 19:37:22,681 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:22,681 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:22,682 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:37:22,682 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:37:22,682 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 19:37:22,683 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:22,683 INFO L85 PathProgramCache]: Analyzing trace with hash 239455686, now seen corresponding path program 1 times [2025-04-13 19:37:22,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:22,683 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594400136] [2025-04-13 19:37:22,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:22,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:22,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-13 19:37:22,701 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 19:37:22,701 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:22,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:22,842 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 19:37:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:22,842 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594400136] [2025-04-13 19:37:22,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594400136] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:22,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:22,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 19:37:22,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079109356] [2025-04-13 19:37:22,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:22,843 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 19:37:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:22,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 19:37:22,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-13 19:37:22,854 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2025-04-13 19:37:22,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:22,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:22,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2025-04-13 19:37:22,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:22,990 INFO L116 PetriNetUnfolderBase]: 249/467 cut-off events. [2025-04-13 19:37:22,990 INFO L117 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2025-04-13 19:37:22,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 467 events. 249/467 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2172 event pairs, 15 based on Foata normal form. 26/485 useless extension candidates. Maximal degree in co-relation 1133. Up to 188 conditions per place. [2025-04-13 19:37:22,993 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 31 selfloop transitions, 8 changer transitions 1/55 dead transitions. [2025-04-13 19:37:22,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 245 flow [2025-04-13 19:37:22,993 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 19:37:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 19:37:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2025-04-13 19:37:22,994 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7542857142857143 [2025-04-13 19:37:22,994 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 102 flow. Second operand 5 states and 132 transitions. [2025-04-13 19:37:22,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 245 flow [2025-04-13 19:37:22,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 235 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 19:37:22,996 INFO L231 Difference]: Finished difference. Result has 47 places, 37 transitions, 142 flow [2025-04-13 19:37:22,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=37} [2025-04-13 19:37:22,997 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2025-04-13 19:37:22,997 INFO L485 AbstractCegarLoop]: Abstraction has has 47 places, 37 transitions, 142 flow [2025-04-13 19:37:22,997 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:22,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:22,997 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 19:37:22,997 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:37:22,997 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 19:37:22,998 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:22,998 INFO L85 PathProgramCache]: Analyzing trace with hash -578570545, now seen corresponding path program 1 times [2025-04-13 19:37:22,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:22,999 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310139784] [2025-04-13 19:37:23,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:23,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:23,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-13 19:37:23,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-13 19:37:23,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:23,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:23,134 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 19:37:23,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:23,134 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310139784] [2025-04-13 19:37:23,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310139784] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:23,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:23,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 19:37:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321309364] [2025-04-13 19:37:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:23,135 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 19:37:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:23,135 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 19:37:23,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-04-13 19:37:23,140 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 35 [2025-04-13 19:37:23,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 37 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:23,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:23,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 35 [2025-04-13 19:37:23,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:23,248 INFO L116 PetriNetUnfolderBase]: 174/326 cut-off events. [2025-04-13 19:37:23,248 INFO L117 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2025-04-13 19:37:23,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 326 events. 174/326 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1195 event pairs, 6 based on Foata normal form. 20/338 useless extension candidates. Maximal degree in co-relation 911. Up to 108 conditions per place. [2025-04-13 19:37:23,251 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 29 selfloop transitions, 11 changer transitions 1/56 dead transitions. [2025-04-13 19:37:23,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 272 flow [2025-04-13 19:37:23,251 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 19:37:23,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 19:37:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2025-04-13 19:37:23,252 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.719047619047619 [2025-04-13 19:37:23,252 INFO L175 Difference]: Start difference. First operand has 47 places, 37 transitions, 142 flow. Second operand 6 states and 151 transitions. [2025-04-13 19:37:23,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 272 flow [2025-04-13 19:37:23,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 247 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-04-13 19:37:23,255 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 156 flow [2025-04-13 19:37:23,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2025-04-13 19:37:23,255 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2025-04-13 19:37:23,255 INFO L485 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 156 flow [2025-04-13 19:37:23,255 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:23,255 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:23,255 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, 1, 1] [2025-04-13 19:37:23,256 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:37:23,256 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 19:37:23,256 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash -340658482, now seen corresponding path program 1 times [2025-04-13 19:37:23,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:23,256 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173111963] [2025-04-13 19:37:23,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:37:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:23,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-04-13 19:37:23,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 19:37:23,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:37:23,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:23,370 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 19:37:23,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:23,373 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173111963] [2025-04-13 19:37:23,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173111963] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:23,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:23,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 19:37:23,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234487928] [2025-04-13 19:37:23,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:23,374 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 19:37:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:23,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 19:37:23,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 19:37:23,378 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 35 [2025-04-13 19:37:23,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:23,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:23,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 35 [2025-04-13 19:37:23,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:23,460 INFO L116 PetriNetUnfolderBase]: 196/432 cut-off events. [2025-04-13 19:37:23,460 INFO L117 PetriNetUnfolderBase]: For 298/306 co-relation queries the response was YES. [2025-04-13 19:37:23,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 432 events. 196/432 cut-off events. For 298/306 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2046 event pairs, 70 based on Foata normal form. 8/392 useless extension candidates. Maximal degree in co-relation 1051. Up to 175 conditions per place. [2025-04-13 19:37:23,462 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 1 changer transitions 14/54 dead transitions. [2025-04-13 19:37:23,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 266 flow [2025-04-13 19:37:23,463 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-13 19:37:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-13 19:37:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2025-04-13 19:37:23,463 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7314285714285714 [2025-04-13 19:37:23,463 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 156 flow. Second operand 5 states and 128 transitions. [2025-04-13 19:37:23,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 266 flow [2025-04-13 19:37:23,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 202 flow, removed 14 selfloop flow, removed 8 redundant places. [2025-04-13 19:37:23,465 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 109 flow [2025-04-13 19:37:23,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=109, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2025-04-13 19:37:23,466 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2025-04-13 19:37:23,466 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 109 flow [2025-04-13 19:37:23,466 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:23,466 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:23,466 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, 1, 1] [2025-04-13 19:37:23,466 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 19:37:23,467 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 19:37:23,467 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:23,467 INFO L85 PathProgramCache]: Analyzing trace with hash -716607270, now seen corresponding path program 2 times [2025-04-13 19:37:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:23,467 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185487612] [2025-04-13 19:37:23,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 19:37:23,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:23,472 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 1 equivalence classes. [2025-04-13 19:37:23,477 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 19:37:23,477 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 19:37:23,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:23,580 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 19:37:23,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:23,581 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185487612] [2025-04-13 19:37:23,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185487612] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:23,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:23,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 19:37:23,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750932214] [2025-04-13 19:37:23,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:23,581 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 19:37:23,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:23,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 19:37:23,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-04-13 19:37:23,597 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-13 19:37:23,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:23,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:23,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-13 19:37:23,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:23,725 INFO L116 PetriNetUnfolderBase]: 476/977 cut-off events. [2025-04-13 19:37:23,725 INFO L117 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-04-13 19:37:23,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1955 conditions, 977 events. 476/977 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5910 event pairs, 132 based on Foata normal form. 16/925 useless extension candidates. Maximal degree in co-relation 1942. Up to 292 conditions per place. [2025-04-13 19:37:23,728 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 20 selfloop transitions, 5 changer transitions 23/67 dead transitions. [2025-04-13 19:37:23,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 275 flow [2025-04-13 19:37:23,728 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 19:37:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 19:37:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2025-04-13 19:37:23,729 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2025-04-13 19:37:23,729 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 109 flow. Second operand 7 states and 162 transitions. [2025-04-13 19:37:23,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 275 flow [2025-04-13 19:37:23,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 266 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-04-13 19:37:23,731 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 126 flow [2025-04-13 19:37:23,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2025-04-13 19:37:23,731 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2025-04-13 19:37:23,731 INFO L485 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 126 flow [2025-04-13 19:37:23,731 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:23,731 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:37:23,731 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, 1, 1] [2025-04-13 19:37:23,732 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 19:37:23,732 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 19:37:23,732 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:37:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2061260106, now seen corresponding path program 3 times [2025-04-13 19:37:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:37:23,732 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030882793] [2025-04-13 19:37:23,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 19:37:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:37:23,738 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 1 equivalence classes. [2025-04-13 19:37:23,742 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-04-13 19:37:23,742 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 19:37:23,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:37:23,843 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 19:37:23,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:37:23,844 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030882793] [2025-04-13 19:37:23,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030882793] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:37:23,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:37:23,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-13 19:37:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615581138] [2025-04-13 19:37:23,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:37:23,844 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 19:37:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:37:23,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 19:37:23,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-04-13 19:37:23,850 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-13 19:37:23,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:23,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:37:23,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-13 19:37:23,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:37:23,920 INFO L116 PetriNetUnfolderBase]: 102/260 cut-off events. [2025-04-13 19:37:23,920 INFO L117 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2025-04-13 19:37:23,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 260 events. 102/260 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1064 event pairs, 4 based on Foata normal form. 8/260 useless extension candidates. Maximal degree in co-relation 554. Up to 103 conditions per place. [2025-04-13 19:37:23,921 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2025-04-13 19:37:23,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 47 transitions, 200 flow [2025-04-13 19:37:23,922 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 19:37:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 19:37:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2025-04-13 19:37:23,922 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5755102040816327 [2025-04-13 19:37:23,922 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 126 flow. Second operand 7 states and 141 transitions. [2025-04-13 19:37:23,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 47 transitions, 200 flow [2025-04-13 19:37:23,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 188 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-04-13 19:37:23,923 INFO L231 Difference]: Finished difference. Result has 53 places, 0 transitions, 0 flow [2025-04-13 19:37:23,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=53, PETRI_TRANSITIONS=0} [2025-04-13 19:37:23,924 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2025-04-13 19:37:23,924 INFO L485 AbstractCegarLoop]: Abstraction has has 53 places, 0 transitions, 0 flow [2025-04-13 19:37:23,924 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 19:37:23,927 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-13 19:37:23,928 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-13 19:37:23,928 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-13 19:37:23,928 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-04-13 19:37:23,928 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 19:37:23,928 INFO L422 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2025-04-13 19:37:23,930 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 19:37:23,930 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 19:37:23,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 07:37:23 BasicIcfg [2025-04-13 19:37:23,935 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 19:37:23,937 INFO L158 Benchmark]: Toolchain (without parser) took 2759.67ms. Allocated memory is still 155.2MB. Free memory was 107.8MB in the beginning and 101.6MB in the end (delta: 6.2MB). Peak memory consumption was 5.0MB. Max. memory is 8.0GB. [2025-04-13 19:37:23,937 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 159.4MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:37:23,938 INFO L158 Benchmark]: CACSL2BoogieTranslator took 401.74ms. Allocated memory is still 155.2MB. Free memory was 107.8MB in the beginning and 84.7MB in the end (delta: 23.1MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-13 19:37:23,938 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.02ms. Allocated memory is still 155.2MB. Free memory was 84.7MB in the beginning and 82.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:37:23,938 INFO L158 Benchmark]: Boogie Preprocessor took 30.52ms. Allocated memory is still 155.2MB. Free memory was 82.7MB in the beginning and 80.5MB in the end (delta: 2.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 19:37:23,938 INFO L158 Benchmark]: RCFGBuilder took 363.13ms. Allocated memory is still 155.2MB. Free memory was 80.5MB in the beginning and 58.6MB in the end (delta: 21.9MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2025-04-13 19:37:23,938 INFO L158 Benchmark]: TraceAbstraction took 1928.13ms. Allocated memory is still 155.2MB. Free memory was 57.7MB in the beginning and 101.6MB in the end (delta: -43.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 19:37:23,939 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 159.4MB. Free memory is still 85.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 401.74ms. Allocated memory is still 155.2MB. Free memory was 107.8MB in the beginning and 84.7MB in the end (delta: 23.1MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 30.02ms. Allocated memory is still 155.2MB. Free memory was 84.7MB in the beginning and 82.7MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 30.52ms. Allocated memory is still 155.2MB. Free memory was 82.7MB in the beginning and 80.5MB in the end (delta: 2.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * RCFGBuilder took 363.13ms. Allocated memory is still 155.2MB. Free memory was 80.5MB in the beginning and 58.6MB in the end (delta: 21.9MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1928.13ms. Allocated memory is still 155.2MB. Free memory was 57.7MB in the beginning and 101.6MB in the end (delta: -43.9MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 61 locations, 57 edges, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.9s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 189 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 181 mSDsluCounter, 33 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 382 IncrementalHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 9 mSDtfsCounter, 382 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=3, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 573 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-13 19:37:23,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...